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Boonton 4541 Instruction Manual

4540 series. rf power meter
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INSTRUCTION MANUAL
RF POWER METER
This manual covers instrument
serial #s: 11001 and higher
Wireless Telecom Group
25 EASTMANS ROAD, PARSIPPANY, NJ 07054
Telephone: 973-386-9696
Fax: 973-386-9191
Email: boonton@boonton.com
Web:
www.wtcom.com
4540 SERIES
REV DATE 7/20/2009
MANUAL P/N 98406100A
CD P/N 98406199A

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  • Page 1 4540 SERIES RF POWER METER This manual covers instrument REV DATE 7/20/2009 serial #s: 11001 and higher MANUAL P/N 98406100A CD P/N 98406199A Wireless Telecom Group 25 EASTMANS ROAD, PARSIPPANY, NJ 07054 Telephone: 973-386-9696 Fax: 973-386-9191 Email: boonton@boonton.com Web: www.wtcom.com...
  • Page 2 P/N 98406100A This manual covers instrument serial numbers: 11001 and higher. The 4540 Application software used in this product is licensed by Boonton Electronics, a subsidiary of the Wireless Telecom Group, Inc. K-Connector® is a registered trademark of Anritsu Corporation.

  • Page 3: Safety Summary

    Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Boonton Electronics assumes no liability for the customer’s failure to comply with these requirements.

  • Page 4: Safety Symbols

    Boonton 4540 Series RF Power Meter SAFETY SYMBOLS This safety requirement symbol (located on the rear panel) has been adopted by the International Electro-technical Commission, Document 66 (Central Office) 3, Paragraph 5.3, which directs that an instrument be so labeled if, for the correct use of the instrument, it is necessary to refer to the instruction manual.

  • Page 5: Table Of Contents

    Boonton 4540 Series RF Power Meter General Information ....................1-1 1.1 Organization ......................1-1 1.2 Description ......................1-2 1.3 Features ......................... 1-3 1.4 Accessories ......................1-5 Standard ....................... 1-5 Optional........................ 1-5 Sensors ......................... 1-5 1.5 Models, Options and Configurations ..............1-5 1.6 Specifications ......................
  • Page 6 Boonton 4540 Series RF Power Meter Operation ........................ 4-1 4.1 Manual Operation ....................4-1 4.2 Control Menus ...................... 4-1 4.3 Numerical Data Entry ................... 4-2 4.4 Sensor Calibration ....................4-3 4.5 Menu Reference ....................4-4 4.5.1 Main Menu - Pulse and Modulated Modes - Pg 1 (Top Level) ..... 4-4 4.5.2 Main Menu - Pulse and Modulated Modes - Pg 2 (Top Level) .....
  • Page 7 Boonton 4540 Series RF Power Meter 4.5.39 System > I/O Config > Multi IO Menu ............ 4-63 4.5.40 System > I/O Config > Multi IO > IO Mode Status Out Menu ....4-64 4.5.41 System > I/O Config > Multi IO > IO Mode Rec Out Menu ....4-65 4.5.42 System >...
  • Page 8 Boonton 4540 Series RF Power Meter *SRE ........................5-8 *STB? ........................5-9 *TRG........................5-9 *TST? ........................5-9 *WAI........................5-10 5.6.2 CALCulate Subsystem ................. 5-11 CALCulate:LIMit:CLEar[:IMMediate] ............. 5-11 CALCulate:LIMit:FAIL? ................... 5-11 CALCulate:LIMit:LOWer[:POWer] ..............5-11 CALCulate:LIMit:UPPer[:POWer] ..............5-12 CALCulate:LIMit:LOWer:STATe ..............5-12 CALCulate:LIMit:UPPer:STATe ..............5-12 CALCulate:LIMit[:BOTH]:STATe ..............
  • Page 9 Boonton 4540 Series RF Power Meter 5.6.5 FETCh Queries .................... 5-23 FETCh:ARRay:AMEAsure:POWer? ..............5-23 FETCh:ARRay:AMEAsure:STATistical? ............5-23 FETCh:ARRay:AMEAsure:TIMe? ..............5-24 FETCh:ARRay:CW:POWer? ................5-24 FETCh:ARRay:MARKer:POWer?..............5-25 FETCh:ARRay:TEMPerature:AVERage? ............5-25 FETCh:ARRay:TEMPerature:CURRent? ............5-25 FETCh:CW:POWer? ..................5-25 FETCh:INTERval:AVERage? ................5-26 FETCh:INTERval:MAXFilt? ................5-26 FETCh:INTERval:MINFilt? ................
  • Page 10 Boonton 4540 Series RF Power Meter MEMory:SNSR:LFLIN? ................... 5-36 MEMory:SNSR:MESSage? ................5-36 MEMory:SNSR:TEMPCOMP? ................. 5-36 MEMory:SYS:LOAD ..................5-37 MEMory:SYS:STORe ..................5-37 5.6.10 OUTPut Subsystem ..................5-38 OUTPut:EXTernal:LEVel[:POWer] ..............5-38 OUTPut:EXTernal:POLArity ................5-38 OUTPut:EXTernal:PRESent? ................5-39 OUTPut:EXTernal:PULSe:CTRL ..............5-39 OUTPut:EXTernal:PULSe:DCYCle ..............5-39 OUTPut:EXTernal:PULse:PERiod..............
  • Page 11 Boonton 4540 Series RF Power Meter READ:MARKer:CURsor:POWer? ..............5-50 READ:MARKer:RATio? .................. 5-50 READ:MARKer:RDELTa? ................5-51 READ:MARKer:RRATio? ................5-51 5.6.12 SENSe Subsystem ..................5-52 SENSe:AVERage ....................5-52 SENSe:BANDwidth ..................5-52 SENSe:ARRay:CALTemp? ................5-53 SENSe:CALTemp? .................... 5-53 SENSe:CORRection:CALFactor ............... 5-53 SENSe:CORRection:DCYCle ................5-53 SENSe:CORRection:FREQuency ..............
  • Page 12 Boonton 4540 Series RF Power Meter 5.6.14 SYSTem Subsystem................... 5-66 SYSTem:AUTOSET..................5-66 SYSTem:BEEP[:ENABle] ................5-66 SYSTem:BEEP:IMMediate ................5-66 SYSTem:COMMunicate:GPIB:ADDRess ............5-66 SYSTem:COMMunicate:LAN:ADDRess ............5-67 SYSTem:COMMunicate:LAN:DGATeway............5-67 SYSTem:COMMunicate:LAN:SMASk ............5-67 SYSTem:COMMunicate:LAN:DHCP[:STATe] ..........5-67 SYSTem:COMMunicate:LAN:MAC? .............. 5-68 SYSTem:COMMunicate:LAN:CURRent:ADDRess? ........5-68 SYSTem:COMMunicate:LAN:CURRent:DGATeway? ........5-68 SYSTem:DATE:DAY ..................
  • Page 13 Boonton 4540 Series RF Power Meter 6.2.1 Standard IEEE Pulse ..................6-5 6.3 Automatic Measurements ..................6-6 6.3.1 Automatic Measurement Criteria ..............6-6 6.3.2 Automatic Measurement Terms ..............6-7 6.3.3 Automatic Measurement Sequence..............6-8 6.3.4 Average Power Over an Interval ..............6-11 6.4 Statistical Mode Automatic Measurements ............
  • Page 14 Boonton 4540 Series RF Power Meter Limited Warranty ....................... 11-1 Contents...

  • Page 15: General Information

    This instruction manual provides you with the information you need to install, operate and maintain the Boonton 4540 Series RF Power Meter. Section 1 is an introduction to the manual and the instrument. Throughout this manual, the designation ― 4540‖ will be used to mean the 4540 Series RF Power Meter, which includes both the single-channel Model 4541 and the dual-channel Model 4542.

  • Page 16: Description

    The 4540 is really several instruments in one, and can function as a CW Power Meter, a Peak Power Meter, a Statistical Power Analyzer, and an RF Voltmeter. It accepts the full series of Boonton RF power and voltage sensors, which includes coaxial dual-diode sensors and thermal sensors.

  • Page 17: Features

    Boonton 4540 Series RF Power Meter 1.3 Features Software. A 32-bit control computer running a real-time operating system provides display, I/O and system memory functions for the instrument. The instrument also contains a dedicated floating-point DSP, FPGA and memories to perform the measurement functions. Software updates are easily made using the rear-panel Ethernet port.
  • Page 18 RF signals simultaneously or one pulsed signal and one CW signal. Each channel is calibrated and all channel parameters are channel-independent. Balanced Diode Sensors. The balanced diode sensor configuration of most Boonton peak and CW power sensors provides high sensitivity and even-order harmonic suppression. Low VSWR minimizes mismatch errors.

  • Page 19: Accessories

    For sensor selection, refer to the BOONTON Sensor Manual. 1.5 Models, Options and Configurations Model 4541. One measurement channel; sensor and calibrator connectors located on the front panel. Model 4542. Two measurement channels; sensor and calibrator connectors located on the front panel.

  • Page 20: Specifications

    Boonton 4540 Series RF Power Meter 1.6 Specifications Performance specifications for the 4540 Series are listed in Table 1-2. Performance specifications for all Boonton power sensors are found in the Boonton Sensor Manual, which may be ordered as Boonton p/n 98501900J. Table 1-2...

  • Page 21: Trigger

    Boonton 4540 Series RF Power Meter Table 1-2 4540 Series Performance Specifications (continued) (Specifications are subject to change without notice) TRIGGER Trigger Mode: Normal, Auto, Auto Pk-to-Pk, Free Run Trigger Source: Channel 1 (internal) Channel 2 (internal) External Trigger Internal Trigger Level Range:...

  • Page 22: Pulse Mode Operation

    Boonton 4540 Series RF Power Meter Table 1-2 4540 Series Performance Specifications (continued) (Specifications are subject to change without notice) PULSE MODE OPERATION Acquisition Mode: Discontinuous triggered sample acquisition Trace Display: Power versus time swept trace (rolled trace for slow timebases)

  • Page 23: Calibration Source

    Boonton 4540 Series RF Power Meter Table 1-2 4540 Series Performance Specifications (continued) (Specifications are subject to change without notice) CALIBRATION SOURCE Internal Calibrator Operating Modes: Off, On CW Frequency: 50.025 MHz ± 0.1% Level Range: -60 to +20 dBm Resolution: 0.1 dB...

  • Page 24: Physical And Environmental Characteristics

    Boonton 4540 Series RF Power Meter Table 1-2 4540 Series Performance Specifications (continued) (Specifications are subject to change without notice) PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS Case Dimensions: 8.4W x 3.5H x 13.5D inches (21.3 x 8.9 x 34.3 cm), Half-rack width, 2U height Weight: 7.7 lbs (3.5kg)

  • Page 25: Installation

    Save the packing material and container to ship the instrument, if necessary. If the original materials (or Note suitable substitute) are not available, contact Boonton Electronics to purchase replacements. Store materials in a dry environment. Refer to the Physical and Environmental Specifications in Table 1-2 for further information.

  • Page 26: Power Requirements

    Boonton 4540 Series RF Power Meter Table 2-1 4540 Series Packing List INSTRUMENT (See also Table 1-1) 4540 Series RF Power Meter Line Cord Fuse Kit Boonton Instruction Manual CD SENSOR(S) (packaged separately) Sensor(s) Sensor Cable(s) Type N to SMA Adapter (if required) BOONTON Sensor Manual CD For bench-top use, choose a clear, uncluttered area.

  • Page 27: Preliminary Check

    Boonton 4540 Series RF Power Meter Most triggered applications can use the RF signal applied to the sensors for triggering. For measurements Trigger requiring external triggering, connect the external trigger signal to the EXT TRIGGER BNC connector on the rear panel.
  • Page 28 Verify that the instrument serial number and model number shown are correct, and the correct number of channels (single or dual) appears. If the channels are configured for non-standard length input cables, the expected sensor cable length expected may also be appended. If any of this information appears incorrect, contact Boonton Electronics for technical support.

  • Page 29: Getting Started

    Boonton 4540 Series RF Power Meter 3. Getting Started This chapter will introduce the user to the 4540 Series. The chapter will identify objects on the front and rear panels, identify display organization, list the initial configuration of the instrument after reset, demonstrate how to calibrate the sensors, and provide practice exercises for front panel operation.
  • Page 30 Boonton Peak or CW power sensors and Boonton voltage probes. Do not attempt to connect anything other than a Caution Boonton power sensor, voltage probe or sensor adapter to the Sensor inputs! The sensor inputs are not measurement terminals and cannot be used for other than the intended purpose.
  • Page 31 Boonton 4540 Series RF Power Meter Table 3-1 Operating Controls, Indicators and Connections (continued) Reference # Front Rear Nomenclature Function ◄ and ► Keys Used to assist navigating between levels of the menu structure while in Menu Mode or Zero/Cal Mode and to select individual editing numeric parameters.
  • Page 32 Boonton 4540 Series RF Power Meter Table 3-1 Operating Controls, Indicators and Connections (continued) Reference # Front Rear Nomenclature Function Cal/Zero Key Displays the Sensor Calibration menu to select and initiate automatic sensor offset and gain adjustments using the 4540’s built-in 50MHz calibrator or an external calibrator.
  • Page 33 Boonton 4540 Series RF Power Meter Table 3-1 Operating Controls, Indicators and Connections (continued) Reference # Front Rear Nomenclature Function Cooling Fan Cooling air intake AC Line Input A multi-function power input module is used to house the AC line input, main power switch, and safety fuse.

  • Page 34: Lcd Monitor Display

    Boonton 4540 Series RF Power Meter 3.3 LCD Monitor Display This subsection includes a picture (Figure 3-3) and a table (Table 3-2) of descriptions of the display layout of the 4540 Series. Figure 3-3a shows the graphics (trace) display mode of the instrument. Figure 3-3b shows the pulse mode text (automeasure) display mode of the instrument.
  • Page 35 Boonton 4540 Series RF Power Meter Table 3-2 LCD Monitor Display Fields (continued) Ref. No. Field Name Mode Description Timebase For pulse and modulated mode, indicates the timebase per division selected for the waveform display. In statistical mode this field is replaced with a label indicating the half span dB level for the horizontal axis.
  • Page 36 Boonton 4540 Series RF Power Meter Table 3-2 LCD Monitor Display Fields (continued) GPIB/Remote Status The GPIB/Remote status indicator is located at the lower right corner of the 4540 display. Blank - Remote control is not active and in Local state.
  • Page 37 Boonton 4540 Series RF Power Meter Table 3-2 LCD Monitor Display Fields (continued) Ref. No. Field Name Mode Description Main Measurement Modulated (Text) Displays the main measurement for the channel. This menu selectable field can be channel average power or one of several math functions.

  • Page 38: Initialize

    In general, when any sensor error message occurs, disconnect and reconnect the sensor and press ESC. If the message persists, refer the problem to Boonton Electronics for technical support. Initializing the instrument does not affect parameters selected for the GPIB Bus, Ethernet configuration, or Note screen saver settings.
  • Page 39 Boonton 4540 Series RF Power Meter Table 3-3. Initialized Parameters Parameter Applies to: Default Graph/Text Mode Select Graph Parameters Related to the Channel > Chan # > Menus Channel Vertical Scale Log Power 10 dB/Div Linear Power 1 mW/Div Log Volts...
  • Page 40 Boonton 4540 Series RF Power Meter Table 3-3. Initialized Parameters (continued) Parameter Applies to: Default Parameters Related to the Time > Menu Timebase Pulse Mode 100 µs/Div Timebase Modulated Mode 200 ms/Div Position Pulse Mode Position Control Pulse Mode Vernier...
  • Page 41 Boonton 4540 Series RF Power Meter Table 3-3. Initialized Parameters (continued) Parameter Applies to: Default Parameters Related to the Stat Mode > Menu Horizontal Scale Statistical Mode 2 dB/Div Horizontal Offset Statistical Mode 0.00 dB Term Options (Menu) Term Action...

  • Page 42: Calibration

    STEP PROCEDURE Connect a Boonton Peak Power sensor to the instrument’s CHANNEL_ input using the supplied cable. The cable will have a silver multipin connector on each end. To connect the cable, align the red dots between the connector and sensor and insert. Once the connector clicks into place, the cable will not pull out without sliding the barrel of the connector away from the connection point.
  • Page 43 Boonton 4540 Series RF Power Meter STEP PROCEDURE Select the Calibration menu soft key. Initiate autocalibration by selecting AutoCal > Start. The AutoCal routine will calibrate the entire dynamic range of the sensor in approximately 1.5 minutes while reporting status via a dialog box.
  • Page 44 Boonton 4540 Series RF Power Meter Figure 3-5. Menus for Sensor Calibration Procedure 3-16 Getting Started...

  • Page 45: Making Measurements

    Boonton 4540 Series RF Power Meter 3.6 Making Measurements What you need to know To perform accurate measurements, the following is a minimum list of things you should know about the signal that you wish to measure. Signal frequency - The center frequency of the carrier must be known to allow sensor frequency response compensation.

  • Page 46: Pulse Mode

    Boonton 4540 Series RF Power Meter 3.6.2 Pulse Mode For periodic or pulsed signals, it is often necessary to analyze the power for a portion of the waveform, or a certain region of a pulse or pulse burst. For these applications, the 4540 Series has a triggered Pulse Mode. Operation in this mode is similar to a digital storage oscilloscope - power samples are stored in a circular memory buffer until a trigger signal is received.

  • Page 47: Statistical Mode

    Boonton 4540 Series RF Power Meter 3.6.3 Statistical Mode Certain signals are completely random and provide no event that can serve as a trigger for measurements. CDMA or OFDM are common examples. The 4540 Series Statistical Mode was designed to provide measurements for these type of signals.
  • Page 48 Boonton 4540 Series RF Power Meter Note that this analysis does not depend upon any particular test signal, or upon synchronization with the modulating signal. In fact, the analysis can be done using actual communication system signals. Normal operation is not disturbed by the need to inject special test signals.

  • Page 49: Operation

    2 pages. The 4540 Series includes the single channel Model 4541 and the dual channel Model 4542. In the 4542 there are two instances of the Channel menu, designated Channel 1 and Channel 2. For ease of use Channel 1 displayed menus have yellow characters and Channel 2 displayed menus have blue characters.

  • Page 50: Numerical Data Entry

    Boonton 4540 Series RF Power Meter 4.3 Numerical Data Entry Many 4540 Series parameters can be entered directly from the numeric keypad. In some cases, such as the frequency of the measured signal, keypad entry is necessary. In this example, the following menu path is used.

  • Page 51: Sensor Calibration

    Boonton 4540 Series RF Power Meter 4.4 Sensor Calibration The Model 4540 Series features a built-in AutoCal process that automatically calibrates the Peak Power sensors for all measurement modes, and also calibrates most CW Power sensors for the modulated measurement mode. An internal programmable 50 MHz calibrator outputs discrete incremental power levels covering the dynamic range of the sensor.

  • Page 52: Menu Reference

    Boonton 4540 Series RF Power Meter 4.5 Menu Reference 4.5.1 Main Menu - Pulse and Modulated Modes - Pg 1 (Top Level) The Main Menu is the topmost menu level from which all other menus originate. Main > Channel Description: Opens the Channel Menu for functions specific to CH1 and CH2.

  • Page 53: Main Menu - Pulse And Modulated Modes - Pg 2 (Top Level)

    Boonton 4540 Series RF Power Meter 4.5.2 Main Menu - Pulse and Modulated Modes - Pg 2 (Top Level) The Main Menu is the topmost menu level from which all other menus originate. Main > Markers Description: Opens the Marker Menu for functions specific to the operation of vertical cursors Marker 1 and Marker 2.

  • Page 54: Main Menu - Statistical Mode - Pg 1 (Top Level)

    Boonton 4540 Series RF Power Meter 4.5.3 Main Menu - Statistical Mode - Pg 1 (Top Level) The Main Menu is the topmost menu level from which all other menus originate. Main > Channel Description: Opens the Channel Menu for functions specific to CH1, CH2, REF1 and REF2.

  • Page 55: Main Menu - Statistical Mode - Pg 2 (Top Level)

    Boonton 4540 Series RF Power Meter 4.5.4 Main Menu - Statistical Mode - Pg 2 (Top Level) The Main Menu is the topmost menu level from which all other menus originate. Main > Cursors Description: Opens the Cursors Menu for functions specific to the operation of the statistical mode cursors.

  • Page 56: Measure Menu

    Boonton 4540 Series RF Power Meter 4.5.5 Measure Menu The Measure menu contains items for controlling measurement acquisition and mode. Main > Measure > Measurement Description: Set or return the state of the data acquisition mode for single or free-run measurements. If Measurement is set...
  • Page 57 Boonton 4540 Series RF Power Meter Main > Measure > Clear Description: Clear display traces and all data buffers for CH1 and CH2. Clears averaging filters to empty. Menu Type: Action. SCPI Command: DISPlay:CLEar Main > Measure > Single Sweep ( Pulse Mode only ) Description: Starts a single measurement cycle in Pulse mode.

  • Page 58: Channel Menu

    Boonton 4540 Series RF Power Meter 4.5.6 Channel Menu Select the specific menu for the desired measurement or reference channel if available. Main > Channel > Channel 1 Description: Select the Channel 1 Menu. Menu Type: Menu Selection. SCPI Command: None Main >...

  • Page 59: Channel 1 | 2 Menu

    The Model 4541 single channel power meter has only a Channel 1 menu, while the dual-channel Model 4542 has separate color-coded menus for Channel 1 and Channel 2.
  • Page 60 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Calibration Description: Select the calibration menu for the specified channel. Menu Type: Menu Selection. Main > Channel > Channel 1 | 2 > Extensions Description: Select the extensions menu for the specified channel.

  • Page 61: Channel > Calibration Menu

    Boonton 4540 Series RF Power Meter 4.5.8 Channel > Calibration Menu The calibration menu contains menu items to initiate multi-step autocalibration, fixed calibration, and sensor offset zeroing. Additionally, menus are provided to allow selection of the calibration source and a shortcut menu to the selected calibrator control menu.
  • Page 62 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Calibration > Sel Calibrator Description: Selects the internal 50 MHz calibrator or the optional 1 GHz external calibrator for autocal and zero. The selection made will apply globally to all selection points in the menu system.

  • Page 63: Channel > Extensions Pg 1 Menu (Modulated Mode)

    Boonton 4540 Series RF Power Meter 4.5.9 Channel > Extensions Pg 1 Menu (Modulated Mode) The extensions menu provides access to more advanced channel options such as trace filtering and channel units. Additionally access to menu page two is provided. This menu is for sensors in Modulated Mode.
  • Page 64 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 1 > Filter Time Description: Set the current length of the integration filter on the selected channel. Menu Type: Numeric value. Range: 0.010 s to 15.000 s SCPI Command: SENSe[1|2]:FILTer:TIMe <numeric_value>...

  • Page 65: Channel > Extensions Pg 1 > Corrections Menu (Modulated Mode)

    Boonton 4540 Series RF Power Meter 4.5.10 Channel > Extensions Pg 1 > Corrections Menu (Modulated Mode) The corrections menu contains items for adjusting correction factors for sensors. This menu consists of an offset adjustment, and a frequency cal factor control.
  • Page 66 Boonton 4540 Series RF Power Meter Fig. 4-11 Corrections Fig. 4-12 Corrections Fig. 4-13 Corrections Menu (Modulated) Menu (Modulated) Peak Menu (Modulated) Voltage Probe Power Sensor - No TC CW Power Sensor 4-18 Operation...

  • Page 67: Channel > Extensions Pg 2 Menu (Modulated Mode)

    Boonton 4540 Series RF Power Meter 4.5.11 Channel > Extensions Pg 2 Menu (Modulated Mode) This menu is page two of the channel extensions menu. This menu provides items to set video bandwidth, sensor correction frequency, and peak hold. You can also access the alarms menu.
  • Page 68 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Frequency Description: Set the RF frequency for the current measurement. The appropriate frequency calfactor from the sensor’s EEPROM table will be interpolated and applied automatically.

  • Page 69: Channel > Extensions Pg 2 > Alarms Menu (Modulated Mode)

    Boonton 4540 Series RF Power Meter 4.5.12 Channel > Extensions Pg 2 > Alarms Menu (Modulated Mode) The Alarms menu provides controls for enabling alarms and adjusting alarm limits (trip points). Controls the power limit alarm operation. When alarm operation is enabled, the ― primary measurement‖(average power in CW or Modulated modes, average power between markers in Pulse mode) is monitored, and compared to preset upper and lower power limits.
  • Page 70 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Alarms > Low Limit Description: Set the lower limit power level for the selected channel. When the measured average power is below the lower limit, a down arrow ▼...

  • Page 71: Channel > Extensions Pg 1 Menu (Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.13 Channel > Extensions Pg 1 Menu (Pulse Mode) The extensions menu provides access to more advanced channel options such as trace averaging and channel units. Additionally access to the corrections, define pulse, and extensions menu page two are provided. This menu is for Peak Power Sensors in Pulse Mode.
  • Page 72 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 1 > Define Pulse Description: Selects the define pulse menu for the selected channel. Menu Type: Menu Select. Main > Channel > Channel 1 | 2 > Extensions Pg 1 > More Description: Opens page 2 of the Channel Extensions Menu.

  • Page 73: Channel > Extensions Pg 1 > Corrections Menu (Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.14 Channel > Extensions Pg 1 > Corrections Menu (Pulse Mode) The corrections menu contains items for adjusting correction factors for sensors. This menu consists of an offset adjustment, frequency cal factor control, and a control for enabling or disabling temperature compensation for peak power sensors.
  • Page 74 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 1 > Corrections > Duty Cycle Description: Sets the duty cycle in percent for calculated CW pulse power measurements. Valid only for thermal sensors and CW sensors in the square-law region and subject to the accuracy of the duty cycle value.

  • Page 75: Channel > Extensions Pg 1 > Define Pulse Menu (Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.15 Channel > Extensions Pg 1 > Define Pulse Menu (Pulse Mode) The define pulse menu contains items for adjusting how automatic pulse measurements are calculated. Measurements such as rise time, fall time, and pulse width are affected by these adjustments. For more information on pulse calculation definitions, see section 6.2 Pulse Definitions.
  • Page 76 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 1 > Define Pulse > Pulse Units Description: Set the units for entering the pulse distal, mesial, and proximal levels. If Volts are selected, the pulse transition levels will be defined as the specified percentage in voltage.

  • Page 77: Channel > Extensions Pg 1 > Define Pulse > Pulse Gate Menu

    Boonton 4540 Series RF Power Meter 4.5.16 Channel > Extensions Pg 1 > Define Pulse > Pulse Gate Menu Main Channel > Channel 1 | 2 > Extensions Pg 1 > Pulse Gate > Start Gate Description: Sets the beginning of the pulse measurement region as a percentage of pulse width.

  • Page 78: Channel > Extensions Pg 2 Menu (Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.17 Channel > Extensions Pg 2 Menu (Pulse Mode) This menu is page two of the channel extensions menu. This menu provides items to set video bandwidth, sensor correction frequency, and peak hold. You can also access the alarms menu.
  • Page 79 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Frequency Description: Set the RF frequency for the current measurement. The appropriate frequency calfactor from the sensor’s EEPROM table will be interpolated and applied automatically.

  • Page 80: Channel > Extensions Pg 2 > Alarms Menu (Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.18 Channel > Extensions Pg 2 > Alarms Menu (Pulse Mode) The Alarms menu provides controls for enabling alarms and adjusting alarm limits (trip points). Controls the power limit alarm operation. When alarm operation is enabled, the ― primary measurement‖(average power in CW or Modulated modes, average power between markers in Pulse mode) is monitored, and compared to preset upper and lower power limits.
  • Page 81 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Alarms > Low Limit Description: Set the lower limit power level for the selected channel. When the measured average power is below the lower limit, a down arrow ▼...

  • Page 82: Channel > Extensions Pg 1 Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.19 Channel > Extensions Pg 1 Menu (Statistical Mode) The extensions menu provides access to more advanced channel options such as corrections and channel units. Additionally access to menu page two is provided. This menu is for peak sensors in Statistical Mode.

  • Page 83: Channel > Extensions Pg 1 > Corrections Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.20 Channel > Extensions Pg 1 > Corrections Menu (Statistical Mode) The corrections menu contains items for adjusting correction factors for sensors. This menu consists of an offset adjustment, frequency cal factor control, and a control for enabling or disabling temperature compensation for peak power sensors.
  • Page 84 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 1 > Corrections > Duty Cycle Description: Sets the duty cycle in percent for calculated CW pulse power measurements. Valid only for thermal sensors and CW sensors in the square-law region and subject to the accuracy of the duty cycle value.

  • Page 85: Channel > Extensions Pg 2 Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.21 Channel > Extensions Pg 2 Menu (Statistical Mode) This menu is page two of the channel extensions menu. This menu provides items to set video bandwidth, sensor correction frequency, and peak hold. You can also access the alarms menu.
  • Page 86 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg 2 > Frequency Description: Set the RF frequency for the current measurement. The appropriate frequency calfactor from the sensor’s EEPROM table will be interpolated and applied automatically.

  • Page 87: Channel > Extensions Pg 2 > Alarms Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.22 Channel > Extensions Pg 2 > Alarms Menu (Statistical Mode) The Alarms menu provides controls for enabling alarms and adjusting alarm limits (trip points). Controls the power limit alarm operation. When alarm operation is enabled, the ― primary measurement‖(average power in CW or Modulated modes, average power between markers in Pulse mode) is monitored, and compared to preset upper and lower power limits.
  • Page 88 Boonton 4540 Series RF Power Meter Main > Channel > Channel 1 | 2 > Extensions Pg2 > Alarms > Low Limit Description: Set the lower limit power level for the selected channel. When the measured average power is below the lower limit, a down arrow ▼...

  • Page 89: Channel > Ref 1 | 2 Menu

    Boonton 4540 Series RF Power Meter 4.5.23 Channel > Ref 1 | 2 Menu The Reference Menu is used to manually or automatically set a power or voltage reference level or to make the current power or voltage level the reference level. With the reference mode enabled, power or voltage values will be expressed relative to the reference rather than absolute.
  • Page 90 Boonton 4540 Series RF Power Meter Main > Channel > Ref 1 | 2 > Set Ref Description: Manually set the ratiometric mode reference level for the selected channel. When the reference level is set, the power specified by the argument will become the current reference level, and all power readings will be in dBr, relative to this level.

  • Page 91: Trigger Menu (Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.24 Trigger Menu (Pulse Mode) The Trigger menu is used to configure trigger settings for pulse measurements. The provided settings control selection of hardware trigger source, trigger polarity, setting the trigger level, and configuring holdoff timing. This menu is only available in Pulse mode.
  • Page 92 Boonton 4540 Series RF Power Meter Main > Trigger > Trig Slope Description: Set the trigger slope or polarity. When set to +, trigger events will be generated when a signal’s rising edge crosses the trigger level threshold. When – is selected, trigger events are generated on the falling edge of the pulse.

  • Page 93: Time Menu (Modulated And Pulse Mode)

    Boonton 4540 Series RF Power Meter 4.5.25 Time Menu (Modulated and Pulse Mode) The time menu provides for controlling the timebase setting, trigger position, and trigger delay. Main > Time > Timebase Description: Set the timebase in seconds/division. The 4540 has fixed timebase settings in a 1-2-5 sequence, and if the argument does not match one of these settings, it will be forced to the next highest entry.
  • Page 94 Boonton 4540 Series RF Power Meter Main > Time > Trig Delay Description: Set the trigger delay time in seconds with respect to the trigger. Positive values cause the actual trigger to occur after the trigger condition is met. This places the trigger event to the left of the trigger point on the display, and is useful for viewing events during a pulse, some fixed delay time after the rising edge trigger.

  • Page 95: Stat Mode Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.26 Stat Mode Menu (Statistical Mode) The statistical mode menu provides for controlling the horizontal axis scale of the CCDF display, the length of time or maximum sample count of the CCDF and the action to be taken when the terminal condition is met.

  • Page 96: Term Options Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.27 Term Options Menu (Statistical Mode) The statistical mode menu provides for controlling the horizontal axis parameters of the CCDF display, the length of time or maximum sample count of the CCDF and the action to be taken when the terminal condition is met.

  • Page 97: Cursors Menu (Statistical Mode)

    Boonton 4540 Series RF Power Meter 4.5.28 Cursors Menu (Statistical Mode) The statistical cursors menu controls the mode and the vertical or horizontal position of the CCDF graphical measurement cursor. This cursor can operate with either the value of the normalized CCDF (percent probability) or the power setting as the indepenedent variable.

  • Page 98: Markers Menu (Modulated And Pulse Modes)

    Boonton 4540 Series RF Power Meter 4.5.29 Markers Menu (Modulated and Pulse Modes) The Markers menu is used to configure measurement markers at specific points on the processed measurement waveform. Automatic measurements may then be used to retrieve measurements at the two markers and in the interval between them.

  • Page 99: Display Menu

    Boonton 4540 Series RF Power Meter 4.5.30 Display Menu The Display menu is the entry point for accessing and editing display configuration parameters. Main Pg 2 > Display > Key Beep Description: Set the audible key beep on or off.

  • Page 100: Display > Graph Header Menu

    Boonton 4540 Series RF Power Meter 4.5.31 Display > Graph Header Menu The Graph header menu is used to customize the text fields above the graph in graphical display mode. There is a different group of settings for each measurement mode.
  • Page 101 Boonton 4540 Series RF Power Meter Main Pg 2 > Display > Graph Header > Defaults Description: Loads the default parameters for the Graph header for the current measurement mode. Menu Type: Toggle. Choices: Ch 1, Ch 2 4-53 Operation...

  • Page 102: Display > Text Mode Menu

    Boonton 4540 Series RF Power Meter 4.5.32 Display > Text Mode Menu The Text Mode menu can be used to configure the Modulated text display. The main measurement sources for channel 1 and channel 2 can be set from this menu. There are also menu items that provide access to configurations form the secondary measurement fields.

  • Page 103: Display > Text Mode > Ch1|2 Options Menu

    Boonton 4540 Series RF Power Meter 4.5.33 Display > Text Mode > Ch1|2 Options Menu The Ch1|2 Options menu provides methods for selecting the secondary measurement/setting fields for the Modulated mode text display. Main Pg 2 > Display > Text Mode > Ch1|2 Options > Sec. Field 1...
  • Page 104 Boonton 4540 Series RF Power Meter Main Pg 2 > Display > Text Mode > Ch1|2 Options > Field 2 Chan Description: Select channel associated with the parameter selected by the Sec Field 2 menu. Menu Type: Toggle. Choices: CH 1, CH 2 Main Pg 2 >...

  • Page 105: Display > Backlight Menu

    Boonton 4540 Series RF Power Meter 4.5.34 Display > Backlight Menu The Backlight menu provides methods for adjusting backlight and screen saver settings. Main Pg 2 > Display > Backlight > Disp Brt Description: Set the backlight brightness for the LCD display in percent.

  • Page 106: System Menu

    Boonton 4540 Series RF Power Meter 4.5.35 System Menu The System menu provides access to system configuration, information, and control functions. Main Pg 2 > System > I/O Config Description: Access the I/O and Configuration menu. Menu Type: Menu Select.

  • Page 107: System > I/O Config Menu

    Boonton 4540 Series RF Power Meter 4.5.36 System > I/O Config Menu The I/O Config menu provides access to set GPIB address and configure Ethernet, and Multi IO port. Main Pg 2 > System > GPIB Address Description: Set the GPIB Address. Press the menu key to obtain the number entry popup.

  • Page 108: System > I/O Config > Ethernet Menu

    Boonton 4540 Series RF Power Meter 4.5.37 System > I/O Config > Ethernet Menu The Ethernet menu provides access to configuration and control functions for the Ethernet interface. Main Pg 2 > System > I/O Config > Ethernet > DHCP/AutoIP...

  • Page 109: System > I/O Config > Ethernet > Extensions Menu

    Boonton 4540 Series RF Power Meter 4.5.38 System > I/O Config > Ethernet > Extensions Menu The Ethernet Extensions menu contains menu items for displaying and editing the IP address, subnet mask, default gateway. There is also a read-only menu for the MAC address.
  • Page 110 Boonton 4540 Series RF Power Meter Main Pg 2 > System > I/O Config > Ethernet > Extensions > MAC Address Description: Displays the MAC Address for the Ethernet adapter. Menu Type: Numeric Value, Read Only. Format: Ethernet MAC address in nn:nn:nn:nn:nn:nn format, where ― nn‖ is a two-digit hexadecimal number.

  • Page 111: System > I/O Config > Multi Io Menu

    Boonton 4540 Series RF Power Meter 4.5.39 System > I/O Config > Multi IO Menu This menu selects the signal to be sent to the Multi-I/O BNC connector on the rear panel. Main Pg 2 > System > I/O Config > Multi IO > IO Mode (Off) Description: Alternately opens and closes the IO Mode Popup Menu.

  • Page 112: System > I/O Config > Multi Io > Io Mode Status Out Menu

    Boonton 4540 Series RF Power Meter 4.5.40 System > I/O Config > Multi IO > IO Mode Status Out Menu This menu selects a TTL compatible status signal to the Multi-I/O BNC connector on the rear panel. Main Pg 2 >...

  • Page 113: System > I/O Config > Multi Io > Io Mode Rec Out Menu

    Boonton 4540 Series RF Power Meter 4.5.41 System > I/O Config > Multi IO > IO Mode Rec Out Menu This menu selects an analog recorder ouput signal to the Multi-I/O BNC connector on the rear panel. Main Pg 2 >...

  • Page 114: System > I/O Config > Multi Io > Rec Out > Rec Limits Menu

    Boonton 4540 Series RF Power Meter Main Pg 2 > System > I/O Config > Multi IO > Scaling (Rec Out) Description: Selects the scaling of the recorder signal. Menu type: Multiple Choice Choices: Manual, Auto SCPI Command: OUTPut:[MIO:]RECOrder:SCALing < character data >...

  • Page 115: System > I/O Config > Multi Io > Io Mode Trig Out Menu

    Boonton 4540 Series RF Power Meter 4.5.43 System > I/O Config > Multi IO > IO Mode Trig Out Menu This menu selects trigger related signals to the Multi-I/O BNC connector on the rear panel. Main Pg 2 > System > I/O Config > Multi IO > IO Mode Trig Out Description: Alternately opens and closes the IO Mode Popup Menu.

  • Page 116: System > I/O Config > Multi Io > Io Mode Volt Out Menu

    Boonton 4540 Series RF Power Meter 4.5.44 System > I/O Config > Multi IO > IO Mode Volt Out Menu This menu selects a voltage level to the Multi-I/O BNC connector on the rear panel. Main Pg 2 > System > I/O Config > Multi IO > IO Mode (Voltage Out) Description: Alternately opens and closes the IO Mode Popup Menu.

  • Page 117: System > Calibrator Menu (Internal 50 Mhz)

    Boonton 4540 Series RF Power Meter 4.5.45 System > Calibrator Menu (Internal 50 MHz) The Calibrator Menu is used to select and control the internal 50 MHz RF calibrator. It can also select the optional, external 1 GHz accessory calibrator (Model 2530). Note that this menu does not contain any items related to sensor calibration - it is only for controlling the calibrator for use as a signal source.

  • Page 118: System > Calibrator Menu (External 1 Ghz - Optional)

    Boonton 4540 Series RF Power Meter 4.5.46 System > Calibrator Menu (External 1 GHz - optional) The Calibrator Menu is used to seclect and control the external 1 GHz RF Calibrator (Model 2530). It can also select the 50 MHz internal calibrator. The external calibrator may be pulse modulated using either a built-in pulse generator, or via a rear- panel BNC pulse input.
  • Page 119 Boonton 4540 Series RF Power Meter Main Pg 2 > System > Calibrator > Status Description: This menu item is not implemented at this time. SCPI Command: None Main Pg 2 > System > Calibrator > Pulse Description: Selects the pulse menu for the external 1 GHz calibrator. This menu item is specific to the 1 GHz calibrator and does not appear when the internal calibrator is selected.

  • Page 120: System > Calibrator > Pulse - Preset Menu (Ext 1 Ghz - Opt.)

    Boonton 4540 Series RF Power Meter 4.5.47 System > Calibrator > Pulse - Preset Menu (Ext 1 GHz - opt.) The pulse menu is specific to the 1 GHz calibrator when it is connected. Control of the internal pulse generator is availble in 2 forms.

  • Page 121: System > Calibrator > Pulse - Variable Menu (Ext 1 Ghz - Opt.)

    Boonton 4540 Series RF Power Meter 4.5.48 System > Calibrator > Pulse - Variable Menu (Ext 1 GHz - opt.) The pulse menu is specific to the 1 GHz calibrator when it is connected. Control of the internal pulse generator is availble in 2 forms.
  • Page 122 Boonton 4540 Series RF Power Meter Fig. 4-62. 4-74 Operation...

  • Page 123: System > Reports Menu

    Boonton 4540 Series RF Power Meter 4.5.49 System > Reports Menu System Reports are text displays that provide additional information for the user. Main Pg 2 > System > Reports > Configuration The Configuration Report shows the hardware options that are licensed and the control software version that is currently loaded.
  • Page 124 The Hardware Info Report shows temperature, power supply voltage and data converter readings at critical points within the instrument. It also reports the CPLD program version. This information is useful for troubleshooting and Boonton Service personnel may ask you to report some or all of these readings in certain situations. Note that you may directly select the other reports without backing out to the previous menu level Fig.
  • Page 125 Boonton 4540 Series RF Power Meter Main Pg 2 > System > Reports > Remote Cmds The Remote Commands Report is a list of all 4540 SCPI remote programming commands along with a brief description of each. A more complete description can be found in Section 6 of this manual. The menu selections allow you to jump to the beginning or the end of the entire list or to scan up and down the list in pages.

  • Page 126: System > Servicing Menu

    Boonton 4540 Series RF Power Meter 4.5.50 System > Servicing Menu This menu accesses various service related functions. Main Pg 2 > System > Servicing > Svc Cal Mode Description: Selects the state of Service Cal Mode. This mode enables a group of service functions.

  • Page 127: System > Servicing > Security Menu

    Boonton 4540 Series RF Power Meter 4.5.51 System > Servicing > Security Menu This menu provides a means to erase sensitive stored information that is incidentally stored in the instrument's memories. The two levels of effectivity are documented on the associated displays.
  • Page 128 Boonton 4540 Series RF Power Meter Main Pg 2 > System > Servicing > Security > Full Sanitize Description: Select the Full Sanitize level which deletes all user data and all operating software. Consider carefully before executing this procedure as it will render the instrument inoperable until all software is re-installed.

  • Page 129: System > Sensor Data Menu

    Boonton 4540 Series RF Power Meter 4.5.52 System > Sensor Data Menu This menu provides information about the characteristics and conditions of the sensors plugged into Channel 1 and Channel 2 (in the Model 4542 only). Main Pg 2 > System > Sensor Data > Sensor 1 Info Description: See a typical peak sensor report below.
  • Page 130 Boonton 4540 Series RF Power Meter Main Pg 2 > System > Sensor Data > Sensor 2 Info Description: See a typical CW sensor report below. Menu Type: Action. SCPI Command: None Fig. 4-70 Sensor Data Report for Sensor 2 Main Pg 2 >...

  • Page 131: Setup Menu

    Boonton 4540 Series RF Power Meter 4.5.53 Setup Menu This menu provides for system preset with default parameters, pre-defined parameters or user defined parameters and automatic acquisition of triggerable signals. Main Pg 2 > Setup > Defaults Description: Load the default values for all parameters.

  • Page 132: Setup > Preset Menu

    Boonton 4540 Series RF Power Meter 4.5.54 Setup > Preset Menu This menu provides presets for widely used communications system signals. Main Pg 2 > Setup > Preset > Select Description: Opens the Select Popup Menu with a list of available presets.

  • Page 133: Setup > User Presets Menu

    Boonton 4540 Series RF Power Meter 4.5.55 Setup > User Presets Menu Main Pg 2 > Setup > User Preset > Preset Name Description: Opens the User Preset Popup Menu with a list of User Names that can be associated with a user defined preset.

  • Page 134: Cal/Zero Key Menu

    Boonton 4540 Series RF Power Meter Fig. 4-75 User Preset Names Popup Menu 4.6 Cal/Zero Key Menu Pressing thefront panel Cal/Zero key will alternately select the color coded Channel 1 and Channel 2 (if present) Calibration menus. For a complete description refer to Section 4.5.8 Channel > Calibration Menu.

  • Page 135: Remote Operation

    The 4540 USB interface is configured automatically by the host computer when the instrument is connected. There are no instrument configuration settings to perform. The instrument will identify itself using the Boonton Electronics USB vendor ID 0x1CB5, and a product ID of 0x4540.

  • Page 136: Scpi Language

    Boonton 4540 Series RF Power Meter 5.4 SCPI Language The 4540 Series instruments may be remotely controlled using commands that follow the industry-standard SCPI programming conventions. The default language is: SYSTem:LANGuage SCPI All of the functions of the 4540 Series are accessible remotely via SCPI commands.

  • Page 137: Command Arguments And Queries

    Boonton 4540 Series RF Power Meter 5.4.5 Command Arguments and Queries Many commands require arguments. In this case, the entire command string is sent, followed by the argument. A space is used to separate the command from the argument. For example, ― SENSe:CORRection:DCYCle 25.0‖ sets duty cycle correction to a value of 25.0.
  • Page 138 Boonton 4540 Series RF Power Meter :CALCulate:STATe? Query the state of measurement channel 1 (default chan #) :CALC:STAT? Query the state of channel 1 (short form, default chan #) :CALCulate1:STATe? Query the state of measurement channel 1 (specified chan #)

  • Page 139: Basic Measurement Information

    Boonton 4540 Series RF Power Meter 5.5 Basic Measurement Information The easiest way to obtain a reading is by use of the MEASure command. This command initiates one complete measurement sequence which includes a default configuration. Examples are: MEAS1:POWER? To return the average power of channel 1, or MEAS1:VOLTAGE? To return the average voltage of channel 1.

  • Page 140: Scpi Command Reference

    Boonton 4540 Series RF Power Meter 5.6 SCPI Command Reference This section contains a list of all SCPI remote commands accepted by the 4540 Series. The list is grouped by SCPI subsystem or IEEE488.2 function, and includes a detailed description of each command.

  • Page 141: Esr

    Boonton 4540 Series RF Power Meter *ESR? Description: Return the current value of the Standard Event Status Register, then clear the register. This register has bits assigned to a number of possible events or conditions of the instrument. When the event occurs, the corresponding bit is latched.

  • Page 142: Opt

    Boonton 4540 Series RF Power Meter *OPC? Description: This command examines the OPC (Operation Complete) status flag and returns a ―1 ‖ if all pending operations are complete. If pending operations are not yet complete, it does not return. Syntax:...

  • Page 143: Stb

    Boonton 4540 Series RF Power Meter *STB? Description: Return the current value of the Status Byte register. This register has bits assigned to a number of possible events or conditions of the instrument. The register value may be read using this command, or may be used to generate a service request (SRQ) over the GPIB when certain conditions exist.

  • Page 144: Wai

    Boonton 4540 Series RF Power Meter *WAI Description: Wait command. This command insures sequential, non-overlapped execution. The 4540 always operates in non-overlapped, sequential mode, therefore this command is accepted as valid, but takes no action. Syntax: *WAI Argument: None Valid Modes:...

  • Page 145: Calculate Subsystem

    (see the SENSe subsystem, Section 5.5.12 ). In a signal-flow block diagram, the CALCulate block operations will follow those of the SENSe block. Note that CALCulate2 commands will generate an error if used with a single channel Model 4541. CALCulate:LIMit:CLEar[:IMMediate] Description: Clear all latched alarms for the selected channel.

  • Page 146: Calculate:limit:upper[:Power]

    Boonton 4540 Series RF Power Meter CALCulate:LIMit:UPPer[:POWer] Description: Set or return the upper limit power level for the selected channel. This limit is used for level alarms. When the measured average power is above the upper limit, an up arrow ▲...

  • Page 147: Calculate:math

    Boonton 4540 Series RF Power Meter CALCulate:MATH Description: Set or return the signal source or sources combined in an arithmetic operation for the displayed reading on the selected channel. Ratiometric displays may be made between two sensors, or between a sensor and a stored reference (see CALCulate:REFerence commands), and sum or difference operations may be performed between two sensors, depending on sensor type.

  • Page 148: Calculate:reference:collect

    Boonton 4540 Series RF Power Meter CALCulate:REFerence:COLLect Description: For the selected channel, make the current power or voltage reading the reference level for ratiometric measurements, replacing the previous reference level. Syntax: CALCulate[1|2]:REFerence:COLLect Argument: None Valid Mode: Modulated CALCulate:REFerence:DATA Description: For the selected channel, set the power level specified by the argument as the reference level for ratiometric measurements, replacing the previous reference level.

  • Page 149: Calculate:state

    Boonton 4540 Series RF Power Meter CALCulate:STATe Description: Set or return the measurement state of the selected channel. When ON, the channel performs measurements; when OFF, the channel is disabled and no measurements are performed. Syntax: CALCulate[1|2]:STATe <Boolean> Argument: <Boolean> = { 0, 1, OFF, ON }...

  • Page 150: Calibration Subsystem

    CH1 and CH2 input channels, respectively. Note that CALibration2 commands will generate an error if used with a single channel Model 4541. Also note that although CALibration commands do not accept any arguments, all have a query form, which returns a status code upon completion of the zero or calibration process.

  • Page 151: Calibration[:Internal]:Autocal

    Boonton 4540 Series RF Power Meter CALibration[:INTernal]:AUTOcal Description: Performs a multi-point sensor gain calibration of the selected sensor with the internal 50 MHz calibrator. This procedure calibrates the sensor’s linearity at a number of points across its entire dynamic range. The calibration source defaults to the instrument’s internal calibrator if not specified.

  • Page 152: Display Subsystem

    Boonton 4540 Series RF Power Meter 5.6.4 DISPlay Subsystem The DISPlay group of commands is used to control the selection and presentation of textual, graphical and TRACe measurements. DISPlay:BACKlight:BRIGhtness Description: Set or return the backlight brightness for the LCD display in percent. Zero percent turns the backlight off.

  • Page 153: Display:modulated:timebase

    Boonton 4540 Series RF Power Meter DISPlay:MODUlated:TIMEBASE Description: Set or return the Modulated Mode timebase in seconds/division. The 4540 has fixed timebase settings, primarily in a 1-2-5 sequence. If the argument does not match one of these settings, it will be forced to the next highest entry. Optional units: minutes.

  • Page 154: Display:pulse:tspan

    Boonton 4540 Series RF Power Meter DISPlay:PULSe:TSPAN (Note: This command is supplied for compatibility with the Model 4530 Power Meter) Description: Set or return the horizontal time span of the display in pulse mode. Time span = 10* Time/Division. Optional units: minutes.

  • Page 155: Display:[Text:]Lin:resolution

    Boonton 4540 Series RF Power Meter DISPlay:[TEXt:]LIN:RESolution Description: Set or return the display resolution for linear power and voltage readings. The number of significant digits displayed is equal to the argument. This command also sets the resolution of measurements returned in remote mode.

  • Page 156: Display:trace:vcenter

    Boonton 4540 Series RF Power Meter DISPlay:TRACe:VCENTer Description: Set or return the power or voltage level of the horizontal centerline of the graph for the specified channel in channel units. If a change in the vertical scale causes the center maximum value to be exceeded, the center will be forced to the maximum value for the new range.

  • Page 157: Fetch Queries

    Boonton 4540 Series RF Power Meter 5.6.5 FETCh Queries The FETCh? group of queries is used to return specific measurement data from a measurement cycle that has been INITiated and is complete or free-running. FETCh? performs the data output portion of the measurement. FETCh? does not start a new measurement, so a series of FETCh? queries may be used to return more than one set of processed measurements from a complete set of acquired data.

  • Page 158: Fetch:array:ameasure:time

    Boonton 4540 Series RF Power Meter FETCh:ARRay:AMEAsure:TIMe? Description: Returns an array of the current automatic timing measurements performed on a periodic pulse waveform. Measurements performed are: the frequency, period, width, offtime and duty cycle of the pulse waveform, and the risetime and falltime of the edge transitions. For each of the measurements to be performed, the appropriate items to be measured must be visible on the display in GRAPH mode.

  • Page 159: Fetch:array:marker:power

    Boonton 4540 Series RF Power Meter FETCh:ARRay:MARKer:POWer? Description: Returns an array of the current marker measurements for the specified channel. The array consists of the average, maximum, and minimum power and peak-to-average ratio between the two markers, powers at both markers, and the ratio of the two markers. Note the peak-to-average ratio and marker ratio are returned in dB for log units, and percent for linear units.

  • Page 160: Fetch:interval:average

    Boonton 4540 Series RF Power Meter FETCh:INTERval:AVERage? Description: For the specified channel, return the average power or voltage in the time interval between marker 1 and marker 2. The units will be the same as the specified channel. Syntax: FETCh[1|2]:INTERval:AVERage?

  • Page 161: Fetch:interval:minimum

    Boonton 4540 Series RF Power Meter FETCh:INTERval:MINimum? Description: For the specified channel, return the minimum instantaneous power or voltage in the time interval between marker 1 and marker 2. The units will be the same as the specified channel. Syntax:...

  • Page 162: Fetch:marker:cursor:percent

    Boonton 4540 Series RF Power Meter FETCh:MARKer:CURsor:PERcent? Description: Return the CCDF cursor y-axis position in percent with respect to the value set by MARKer:POSItion:POWer (CCDF cursor mode is Power Ref). If CCDF cursor mode is Percent, returns user setting. See MARKer:POSItion:POWer and MARKer:POSItion:PERcent. See also Section 6.4 Statistical Mode Automatic Measurements for more information.

  • Page 163: Fetch:marker:minimum

    Boonton 4540 Series RF Power Meter FETCh:MARKer:MINimum? Description: For the specified channel and marker, return the minimum power or voltage at the marker. The units will be the same as the specified channel. Syntax: FETCh[1|2]:MARKer[1|2]:MINimum? Returns: CC, minimum power or voltage at marker Where CC is the measurement condition code.

  • Page 164: Fetch:temperature:average

    Boonton 4540 Series RF Power Meter FETCh:TEMPerature:AVERage? Description: Return the averaged internal temperature of the specified peak power sensor. Note: If a non- temperature compensated peak sensor is in use, the 4540 displays a warning message if the temperature has drifted more than 4C from the autocal temperature.

  • Page 165: Initiate And Abort Commands

    Boonton 4540 Series RF Power Meter 5.6.6 INITiate and ABORt Commands The purpose of the INITiate group of commands is to start and control the process of data acquisition once a measurement has been configured. Depending on settings, the 4540 RF Power Meter may be commanded to begin either a single measurement (INITiate:CONTinuous OFF) which stops when complete, or enter a ―f ree-run‖...

  • Page 166: Marker Subsystem

    Boonton 4540 Series RF Power Meter 5.6.7 MARKer Subsystem The MARKer group of commands is used to configure and locate measurement markers (cursors) at specific points on the processed measurement waveform. FETCH? or READ? queries may then be used to retrieve measurements at the two markers and in the interval between them.

  • Page 167: Marker:position:time

    Boonton 4540 Series RF Power Meter MARKer:POSItion:TIMe Description: Set or return the time (x-axis-position) of the selected marker relative to the trigger. Note that time markers must be positioned within the time limits of the trace window in the graph display. If a time outside of the display limits is entered, the marker will be placed at the first or last time position as appropriate.

  • Page 168: Measure Queries

    Boonton 4540 Series RF Power Meter 5.6.8 MEASure Queries The MEASure group of commands is used to acquire data using a set of high level instructions. They are structured to allow the user to trade off fine control of the measurement process for easy operability. MEASure? provides a complete capability where the power meter is configured, a measurement taken, and results returned in one operation.

  • Page 169: Memory Subsystem

    Boonton 4540 Series RF Power Meter 5.6.9 MEMory Subsystem The MEMory group of commands is used to save and recall instrument operating configurations, and to edit and review user- supplied frequency dependent offset (FDOF) tables for external devices in the signal path. Up to four configurations may be saved, and two frequency dependent offset tables.

  • Page 170: Memory:snsr:info

    Boonton 4540 Series RF Power Meter MEMory:SNSR:INFO? Description: Return the sensor ID and parameter data. Syntax: MEMory:SNSR[1|2]:INFO? Argument: None Valid Modes: MEMory:SNSR:LFLIN? Description: Return sensor smart shaping table. Syntax: MEMory:SNSR[1|2]:LFLIN? Argument: None Valid Modes: MEMory:SNSR:MESSage? Description: Return the sensor message data.

  • Page 171: Memory:sys:load

    Boonton 4540 Series RF Power Meter MEMory:SYS:LOAD Description: Recall a previously stored file image of an instrument setup. Syntax: MEMory:SYS:LOAD <filename> Argument: Alphanumeric filename, "USER1" thru "USER25" Valid Modes: MEMory:SYS:STORe Description: Save a file image of the current instrument setup.

  • Page 172: Output Subsystem

    The OUTPut group of commands is used to control various outputs of the 4540. These outputs include the internal 50 MHz calibrator, the multi IO port, and an external 1GHz RF calibration source (Boonton Model 2530). The internal 50 MHz calibrator is primarily used to for automatic calibration of power sensors.

  • Page 173: Output:external:present

    Boonton 4540 Series RF Power Meter OUTPut:EXTernal:PRESent? Description: Return true if the Model 2530 external 1 GHz calibrator is connected and powered up. Otherwise, return false. Syntax: OUTPut:EXTernal:PRESent? <Boolean> Returns: <Boolean> = { 0, 1 }, Accepts { 0, 1, ON, OFF }...

  • Page 174: Output:external:pulse:perwid

    Boonton 4540 Series RF Power Meter OUTPut:EXTernal:PULse:PERWID Description: Set or return the pulse period <arg1> and pulse width <arg2> in seconds in the Variable pulse control mode of the external 1 GHz calibrator. This parameter has no effect in the preset pulse control mode or the external pulse source mode.

  • Page 175: Output:internal:signal

    Boonton 4540 Series RF Power Meter OUTPut:INTernal:SIGNal Description: Set or return the on/off state of the internal 50 MHz output signal. Syntax: OUTPut:INTernal:SIGNal <Boolean> Argument: <Boolean> = { 0, 1, OFF, ON } Valid Modes: OUTPut:MIO:MODe Description: Set/return Multi IO mode. Below is a description of each mode:...

  • Page 176: Output:[Mio:]Recorodermin

    Boonton 4540 Series RF Power Meter OUTPut:[MIO:]RECOroderMIN Description: Set or return the Multi IO recorder output minimum, or downscale (-10.0V or 0.0V) power reference level. For voltage probes, this is the equivalent power at the current impedance setting. Syntax: OUTPut:RECOrder:MIN < numeric_value >...

  • Page 177: Output:mio:status:setting

    Argument: <character data> = { ALMACT, ALMLATCH, MEASRDY, CAL } Valid Modes: OUTPut:MIO:STATus:SOURce Description: Set/return Multi IO source for status out (alarm). Single channel units (Model 4541) only accept ―CH1 ‖ . Syntax: OUTPut:MIO:STATus:SOURce <character data> Argument: <character data> = { CH1, CH2, BOTH }...

  • Page 178: Output:mio:trigout:source

    Boonton 4540 Series RF Power Meter OUTPut:MIO:TRIGout:SOURce Description: Set/return Multi IO source for trigger out mode. Below is a description of each argument: Argument Description INT1, INT2: Multi IO output is active when selected internal trigger is active. EXT: Multi IO output is active when external trigger is active.

  • Page 179: Read Queries

    Boonton 4540 Series RF Power Meter 5.6.11 READ Queries The purpose of the READ? group of queries is to initiate a measurement cycle, acquire data, and return specific measurement data. READ? performs the initiation, data acquisition, postprocessing, and data output portions of the measurement. READ? is equivalent to ABORting any operation in progress, INITiating a new measurement, then FETChing the data when it is ready.

  • Page 180: Read:array:ameasure:time

    Boonton 4540 Series RF Power Meter READ:ARRay:AMEAsure:TIMe? Description: Returns an array of the current automatic timing measurements performed on a periodic pulse waveform. Measurements performed are: the frequency, period, width, offtime and duty cycle of the pulse waveform, and the risetime and falltime of the edge transitions. For each of the measurements to be performed, the appropriate items to be measured must be visible on the display in GRAPH mode.

  • Page 181: Read:array:marker:power

    Boonton 4540 Series RF Power Meter READ:ARRay:MARKer:POWer? Description: Returns an array of the current marker measurements for the specified channel. The array consists of the average, maximum, and minimum power and peak-to-average ratio between the two markers, powers at both markers, and the ratio of the two markers. Note the peak-to-average ratio and marker ratio are returned in dB for log units, and percent for linear units.

  • Page 182: Read:interval:minfilt

    Boonton 4540 Series RF Power Meter READ:INTERval:MINFilt? Description: For the specified channel, return the minimum filtered power or voltage in the time interval between marker 1 and marker 2. The units will be the same as the specified channel. Syntax:...

  • Page 183: Read:marker:average

    Boonton 4540 Series RF Power Meter READ:MARKer:AVERage? Description: For the specified channel and marker, return the average power or voltage at the marker. The units are the same as the specified channel. Syntax: READ[1|2]:MARKer[1|2]:AVERage? Returns: CC, average power or voltage at marker Where CC is the measurement condition code.

  • Page 184: Read:marker:cursor:percent

    Boonton 4540 Series RF Power Meter READ:MARKer:CURsor:PERcent? Description: Return the CCDF cursor y-axis position in percent with respect to the value set by MARKer:POSItion:POWer (CCDF cursor mode is set to Power Ref). If CCDF cursor mode is Percent, returns user setting. See MARKer:POSItion:POWer and MARKer:POSItion:PERcent.

  • Page 185: Read:marker:rdelta

    Boonton 4540 Series RF Power Meter READ:MARKer:RDELTa? Description: For the specified channel return the difference between MK2 and MK1. The units will be the same as marker units. Syntax: READ[1|2]:MARKer:RDELTa? Returns: CC, (MK2-MK1) Where CC is the measurement condition code.

  • Page 186: Sense Subsystem

    Boonton 4540 Series RF Power Meter 5.6.12 SENSe Subsystem The purpose of the SENSe command subsystem is to directly configure device specific settings used to make measurements, generally parameters related to the RF power sensor and signal processing. The SENSe commands are used to configure the power meter for acquiring data.

  • Page 187: Sense:array:caltemp

    Boonton 4540 Series RF Power Meter SENSe:ARRay:CALTemp? Description: Returns both channels’ sensor calibration temperatures. Syntax: SENSe:ARRay:CALTemp? Returns: CC1, Sensor1 cal temp in degrees C, CC2, Sensor2 cal temp in degrees C Where CCn is the measurement condition code. Valid Modes:...

  • Page 188: Sense:correction:frequency

    Boonton 4540 Series RF Power Meter SENSe:CORRection:FREQuency Description: Set or return the RF frequency for the current sensor, and apply the appropriate frequency calfactor from the sensor’s EEPROM table. Application of this calfactor cancels out the effect of variations in the flatness of the sensor’s frequency response. If an explicit calfactor has been set, either manually or via the SENSe:CORRection:CALFactor command, entering a new frequency will override this calfactor and use only the ―...

  • Page 189: Sense:filter:state

    Boonton 4540 Series RF Power Meter SENSe:FILTer:STATe Description: Set or return the current setting of the integration filter on the selected channel. OFF provides no filtering, and can be used at high signal levels when absolute minimum settling time is required.

  • Page 190: Sense:pulse:endgt

    Boonton 4540 Series RF Power Meter SENSe:PULSe:ENDGT Description: Set or return the point on a pulse, which is used to define the end of the pulse’s ― active‖ interval. This point is defined in percent of the total pulse duration, with 0% corresponding to the midpoint of the rising edge, and 100% corresponding to the midpoint of the falling edge, as defined by the mesial setting.

  • Page 191: Sense:pulse:startgt

    Boonton 4540 Series RF Power Meter SENSe:PULSe:STARTGT Description: Set or return the point on a pulse, which is used to define the beginning of the pulse’s ― active‖ interval. This point is defined in percent of the total pulse duration, with 0% corresponding to the midpoint of the rising edge, and 100% corresponding to the midpoint of the falling edge, as defined by the mesial setting.

  • Page 192: Status Commands

    Boonton 4540 Series RF Power Meter 5.6.13 STATus Commands The STATus command subsystem enables you to control the SCPI defined status reporting structures. The user may examine the status or control status reporting of the power meter by accessing the Device, Operation and Questionable status groups Note that GPIB commands may be used to monitor the instrument’s IEEE-488.2 registers (See GPIB - IEEE-488.2...

  • Page 193: Status:device:event

    Boonton 4540 Series RF Power Meter STATus:DEVice:EVENt? Description: Returns the current contents of the Device Event register then resets the register value to 0. The Device Event register contains the latched events from the Device Condition register as specified by the Device status group’s positive and negative transition filters.

  • Page 194: Status:operation:condition

    Boonton 4540 Series RF Power Meter STATus:OPERation:CONDition? Description: Return the current value of the Operation Condition register. The following table shows the bit assignments in the register. These bits are updated by the instrument in real time, and can change in response to changes in the instrument’s operating condition.

  • Page 195: Status:operation:ntransition

    Boonton 4540 Series RF Power Meter STATus:OPERation:NTRansition Description: Set or return the value of the negative transition filter bitmask for the Operation status group. Setting a bit in the positive transition filter causes a 1 to 0 (negative) transition in the corresponding bit of the Operation Condition register to cause a 1 to be written in the associated bit of the Operation Event register.

  • Page 196: Status:questionable:condition

    Boonton 4540 Series RF Power Meter STATus:QUEStionable:CONDition? Description: Return the current value of the Questionable Condition register. The following table shows the bit assignments in the register. These bits are updated by the instrument in real time, and can change in response to changes in the instrument’s operating condition.

  • Page 197: Status:questionable:event

    Boonton 4540 Series RF Power Meter STATus:QUEStionable:EVENt? Description: Returns the current contents of the Questionable Event register then resets the register value to 0. The Questionable Event register contains the latched events from the Questionable Condition register as specified by the Questionable status group’s positive and negative transition filters.

  • Page 198: Status:questionable:calibration:condition

    Boonton 4540 Series RF Power Meter STATus:QUEStionable:CALibration:CONDition? Description: Return the current value of the Questionable Calibration Condition register. This register is used to notify the user of questionable quality with respect to calibration. The following table shows the bit assignments in the register. These bits are updated by the instrument in real time, and can change in response to changes in the instrument’s operating condition.

  • Page 199: Status:questionable:calibration:ntransition

    Boonton 4540 Series RF Power Meter STATus:QUEStionable:CALibration:NTRansition Description: Set or return the value of the negative transition filter bit mask for the Questionable Calibration status group. Setting a bit in the positive transition filter causes a 1 to 0 (negative) transition in the corresponding bit of the Questionable Calibration Condition register to cause a 1 to be written in the associated bit of the Questionable Calibration Event register.

  • Page 200: System Subsystem

    Boonton 4540 Series RF Power Meter 5.6.14 SYSTem Subsystem The SYSTem group of commands is used to control system-level functions not directly related to instrument measurement performance. SYSTem commands are used to return error codes or messages from the power meter error queue, control hardware features (backlight and key beep), access the internal clock/calendar, and configure communication parameters for the GPIB and LAN interfaces.

  • Page 201: System:communicate:lan:address

    Boonton 4540 Series RF Power Meter SYSTem:COMMunicate:LAN:ADDRess Description: Set or return the IP address for the Ethernet port. Syntax: SYSTem:COMMunicate:LAN:ADDRess <character data> Argument: <character data> = instrument IP address in nnn.nnn.nnn.nnn (― dot decimal‖) format Valid Modes: Any for queries. DHCP/AutoIP must be disabled (OFF) to set the instrument IP address.

  • Page 202: System:communicate:lan:mac

    Boonton 4540 Series RF Power Meter SYSTem:COMMunicate:LAN:MAC? Description: Return the instrument’s Ethernet MAC address. Syntax: SYSTem:COMMunicate: LAN:MAC? Returns: <character data> = Ethernet MAC address in nn:nn:nn:nn:nn:nn format, where ―n n ‖ is a two-digit hexadecimal number. Valid Modes: Any. SYSTem:COMMunicate:LAN:CURRent:ADDRess? Description: Returns the current IP address for the Ethernet port.

  • Page 203: System:error[:Next]

    Boonton 4540 Series RF Power Meter SYSTem:DATE:MONTH Description: Set or return the month of the real time clock. Syntax: SYSTem:DATE:MONTH <numeric_value> Argument: <numeric_value> = 1 through 12 Valid Modes: SYSTem:DATE:WEEKday? Description: Return the current day of the week from the real time clock.

  • Page 204: System:error:code

    Boonton 4540 Series RF Power Meter SYSTem:ERRor:CODE? Description: Returns the next queued error code number. Note that errors are stored in a ― first-in-first-out‖ queue, so if more than one error has occurred, repeating this command will report the error codes in the sequence they happened.

  • Page 205: System:version

    Boonton 4540 Series RF Power Meter SYSTem:TIMe:MINUTE Description: Set or return the minute of the real time clock. On entry, resets seconds to :00. Syntax: SYSTem:TIMe:MINUTE <numeric_value> Argument: <numeric_value> = 0 though 59 Valid Modes: SYSTem:VERSion? Description: Return the SCPI version compliance claimed.

  • Page 206: Trace Data Array Commands

    Boonton 4540 Series RF Power Meter 5.6.14 TRACe Data Array Commands The TRACe group of commands is used to control the output of acquired measurement arrays, which appear as a display trace when the power meter is in Graph mode. The TRACe commands allow outputting a channel’s entire internal display trace (501 measurement points) as one large array, or selecting and returning the array in smaller portions.

  • Page 207: Trigger Subsystem

    Boonton 4540 Series RF Power Meter 5.6.15 TRIGger Subsystem The TRIGger group of commands is used to control synchronization of data acquisition with external events. TRIGger commands generally affect only Pulse Mode. TRIGger:CDF:COUNt Description: Set or return the terminal count (sample population size) in millions of samples for Statistical Mode acquisition.

  • Page 208: Trigger:delay

    Boonton 4540 Series RF Power Meter TRIGger:DELay Description: Set or return the trigger delay time in seconds with respect to the trigger for the trigger display location in the LEFT position. Positive values cause the actual trigger to occur after the trigger condition is met.
  • Page 209 Boonton 4540 Series RF Power Meter TRIGger:MODe Description: Set or return the trigger mode for synchronizing data acquisition with pulsed signals. NORM mode will cause a sweep to be triggered each time the power level crosses the preset trigger level in the direction specified by TRIGger:SLOPe.
  • Page 210 Boonton 4540 Series RF Power Meter TRIGger:SOURce Description: Set or return the trigger source used for synchronizing data acquisition. The CH1 and CH2 (Model 4542 only) settings use the signal from the associated sensor. EXT setting uses the signal applied to the rear panel TRIG IN connector.
  • Page 211 Boonton 4540 Series RF Power Meter 5.6.16 SCPI Command Summary Table 5-1. SCPI COMMAND SUMMARY *CLS Clear Status Command *ESE Set/get Standard Event Status Enable *ESR? Standard Event Status Register Query *IDN Identification Query *OPC? Operation Complete Query *OPC Operation Complete Command...
  • Page 212 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) CALCulate[1|2]:PKHLD Set/return state of the peak hold function. <Boolean> = OFF, AVG, INST CALCulate[1|2]:REFerence:COLLect Set the current reading to be the ratiometric measurement reference level. CALCilate[1|2]:REFerence:DATA Set or return the ratiometric measurement reference level in dBm.
  • Page 213 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) DISPlay:SCREensaver:STATe Set/return state of screensaver mode. <Boolean> = { 0, 1, OFF, ON } DISPlay:SCREensaver:TIMe Set/return time until display dims. <numeric_value> = 1 through DISPlay:[TEXt:]LIN:RESolution Set number of significant digits for linear displays and remote return values.
  • Page 214 Boonton 4540 Series RF Power Meter 5-1. SCPI COMMAND SUMMARY (continued) FETCh[1|2]:INTERval:PKAVG? Return peak to average power between MK1 and MK2. FETCh:KEY? Return code of last key depressed FETCh[1|2]:MARKer[1|2]:AVERage? Return current reading at the specified marker. FETCh[1|2]:MARKer:DELTa? Return difference between MK2 and MK1.
  • Page 215 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) MEMory[1|2]:SNSR:CFFAST? Return the sensor high bandwidth (FAST) frequency cal-factor table. MEMory[1|2]:SNSR:CFSLOW? Return the sensor low bandwidth (SLOW) frequency cal-factor table. MEMory[1|2]:SNSR:CWRG Return sensor AC cal data. MEMory[1|2]:SNSR:CWSH? Return sensor smart shaping table.
  • Page 216 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) OUTPut:EXTernal:SIGNal Set or return the on/off state of the external 1 GHz calibrator output signal. OUTPut:INTernal:LEVel[:POWer] Set or return the power level of the internal 50 MHz calibrator output signal.
  • Page 217 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) READ[1|2]:ARRay:AMEAsure:POWer? Return new Ppeak, Pavgcyc, Pavgpulse, Ptop, Pbot, Overshoot READ[1|2]:ARRay:AMEAsure:STATistical? Return new Pavg, Ppeak, Pmin, PkToAvgRatio, CursorPwr, CursorPct, Sample-Count READ[1|2]:ARRay:AMEAsure:TIMe? Return new Freq, Period, Width, Offtime, Dcyc, Risetime, Falltime...
  • Page 218 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) SENSe[1|2]:CORRection:CALFactor Set correction factor in dB. <numeric_value> = -3.00 to 3.00 SENSe[1|2]:CORRection:DCYCle Set/return duty cycle correction factor in percent. <numeric_value> = 0.01 to 100.0% SENSe[1|2]:CORRection:FREQuency Set channel frequency. <numeric_value> = 0.001e9 to 110.00e9 Hz...
  • Page 219 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) STATus:OPERation:CONDition? Return value of Operation Condition Register STATus:OPERation:ENABle Set/return value of Operation Enable Mask STATus:OPERation:EVENt? Return value of Operation Event Register STATus:OPERation:NTRansition Set/return the negative transition filter STATus:OPERation:PTRansition...
  • Page 220 Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) SYSTem:COMMunicate:LAN:MAC? Return the instrument’s Ethernet MAC address.<character data> = Ethernet MAC address in nn:nn:nn:nn:nn:nn format, where ―n n ‖ is a two-digit hexadecimal number. SYSTem:COMMunicate:LAN:CURRent:ADDRess? Returns the current IP address for the Ethernet port.

  • Page 221: Trigger:mode

    Boonton 4540 Series RF Power Meter Table 5-1. SCPI COMMAND SUMMARY (continued) TRIGger:DELay Set/return trigger delay with respect to the trigger. <numeric_value> = see Specifications Section 1-6. TRIGger:HOLDoff Set/return trigger holdoff time. <numeric_value> = 0 to 1 sec in 10...
  • Page 222 Boonton 4540 Series RF Power Meter This page intentionally left blank. 5-88 Remote Operation...

  • Page 223: Application Notes

    Boonton 4540 Series RF Power Meter 6. Application Notes This section provides supplementary material to enhance your knowledge of the 4540 Series' advanced features and measurement accuracy. Topics covered in this section include pulse measurement fundamentals, automatic measurement principles, and an analysis of measurement accuracy.
  • Page 224 Boonton 4540 Series RF Power Meter Figure 6-1. Pulsed RF Signal Figure 6-2. Distorted Pulse Signal Peak Power. The 4540 Series instruments make power measurements in a manner that overcomes the limitations of the pulse power method and provides both peak power and average power readings for all types of modulated carriers. The fast responding diode sensors detect the RF signal to produce a wideband video signal which is sampled with a narrow sampling gate The video sample levels are accurately converted to power on an individual basis at up to a 50 MSa/sec rate.

  • Page 225: Diode Detection

    Boonton 4540 Series RF Power Meter 6.1.2 Diode Detection Wideband diode detectors are the dominant power sensing device used to measure pulsed RF signals. However, several diode characteristics must be compensated to make meaningful measurements. These include the detector’s nonlinear amplitude response, temperature sensitivity, and frequency response characteristic.

  • Page 226: 4540 Series Features

    Boonton 4540 Series RF Power Meter Frequency Response. The carrier frequency response of a diode detector is determined mostly by the diode junction capacitance and the device lead inductances. Accordingly, the frequency response will vary from detector to detector and cannot be compensated readily.

  • Page 227: Pulse Definitions

    Note 2003. Many of the terms used below have been deprecated by the IEEE. However, these terms are widely used in the industry and familiar to users of Boonton power meter s. For this reason, they are retained. Application Notes...

  • Page 228: Automatic Measurements

    Boonton 4540 Series RF Power Meter Table 6-1. Pulse Terms TERM DEFINITION Base Line The two portions of a pulse waveform which represent the first nominal state from which a pulse departs and to which it ultimately returns. Top Line The portion of a pulse waveform which represents the second nominal state of a pulse.

  • Page 229: Automatic Measurement Terms

    Boonton 4540 Series RF Power Meter 6.3.2 Automatic Measurement Terms The following terms appear in the 4540 Series Text display in the Pulse mode. The Text column lists the abbreviated forms that appear on the display screen. Table 6-2. Automatic Measurement Terms...

  • Page 230: Automatic Measurement Sequence

    Boonton 4540 Series RF Power Meter 6.3.3 Automatic Measurement Sequence The automatic measurement process analyzes the captured signal data in the following sequence: Approximately 500 samples of the waveform (equivalent to one screen width) are scanned to determine the maximum and minimum sample amplitudes.
  • Page 231 Boonton 4540 Series RF Power Meter The process locates the bottom amplitude (baseline) using the IEEE histogram method. A histogram is generated for all samples in the lowest 12.8 dB range of sample values. The range is subdivided into 64 power levels of 0.2 dB each.
  • Page 232 Boonton 4540 Series RF Power Meter Item Mesial value 10.0 10.0 Sample n Sample n+1 11.0 12.6 The interpolated crossing time, x, is calculated from: where P is in watts and n is the number of the sampling interval, referenced to the trigger event. For this example 11.

  • Page 233: Average Power Over An Interval

    Boonton 4540 Series RF Power Meter 12. The processor calculates the output values according to the following definitions: a.) Pulse Width Interval between mesial points b.) Risetime See Step 11 c.) Falltime See Step 11 d.) Period Cycle time between mesial points...

  • Page 234: Statistical Mode Automatic Measurements

    Boonton 4540 Series RF Power Meter Figure 6-7 Sampling Intervals 14. The processor calculates the delay between the two measurement channels. The time reference for each channel is established by the first signal crossing (starting from the left edge of the screen) which passes through the mesial level(or 50% point in trigger view).
  • Page 235 Boonton 4540 Series RF Power Meter Fig. 6-9 Statistical Mode Text Display Page 1 Fig. 6-10. Statistical Mode Text Display Page 1 6-13 Application Notes...
  • Page 236 Boonton 4540 Series RF Power Meter Table 6-3. Statistical Automatic Measurements In the Statistical mode the following five automatic measurements are displayed in the 4540 Series Text display for enabled input channels. The Text column lists the abbreviated forms that appear on the display screen.
  • Page 237 Boonton 4540 Series RF Power Meter The following two global status values are displayed: TEXT DEFINITION Total Time: The total time in Hours:Minutes:Seconds that the data acquisition has been running. Points: The total number of data samples in MSa that has been acquired for each channel in the current run.

  • Page 238: Measurement Accuracy

    Boonton 4540 Series RF Power Meter 6.5 Measurement Accuracy The 4540 Series includes a precision, internal, 50 MHz RF reference calibrator that is traceable to the National Institute for Standards and Technology (NIST). When the instrument is maintained according to the factory recommended one year calibration cycle, the calibrator enables you to make highly precise measurements of CW and modulated signals.

  • Page 239: Discussion Of Uncertainty Terms

    Boonton 4540 Series RF Power Meter The worst case approach is a very conservative method in which the extreme conditions of each of the individual uncertainties are added together. If the individual uncertainties are all independent of one another, the probability of all being at their worst-case conditions simultaneously is extremely small.
  • Page 240 SNSR Boonton Electronics Power Sensor Manual. For most measurements, this is the single largest error term, and care should be used to ensure the best possible match between source and sensor.
  • Page 241 Zero Drift Error = ± Sensor Zero Drift (in watts) / Signal Power (in watts) × 100 % The zero drift rating of a particular power sensor may be found on the sensor datasheet, or the Boonton Electronics Power Sensor Manual. Zero drift error is usually insignificant when measuring at high levels (25dB or more above the sensor’s minimum power rating).

  • Page 242: Sample Uncertainty Calculations

    RSS uncertainties are provided for the frequency range covered by each sensor, and are listed on the sensor datasheet and in the Boonton Electronics Power Sensor Manual. If the measurement frequency is between sensor calfactor entries, the most conservative approach is to use the higher of the two corresponding uncertainty figures.
  • Page 243 = ±1.58% Step 9: The Sensor Calfactor Uncertainty is calculated from the uncertainty values in the Boonton Electronics Power Sensor Manual. There is no entry for 10.3GHz, so we’ll have to look at the two closest entries. At 10GHz, the calfactor uncertainty is 4.0%, and at 11GHz it is 4.3%.
  • Page 244 Boonton 4540 Series RF Power Meter Step 10: Now that each of the individual uncertainty terms has been determined, we can combine them to calculate the worst- case and RSS uncertainty values: U (±%) (U×K) instrument uncertainty 0.10 0.500 0.0025 calibrator level uncertainty 2.45...
  • Page 245 Boonton 4540 Series RF Power Meter Step 2: The Calibrator Level Uncertainty for the Model 2530 External 1GHz calibrator may be calculated from the calibrator’s specification. The 0dBm uncertainty is 0.065dB, or 1.51%. To this figure, we must add 0.03dB or 0.69% per 5dB step from 0dBm.
  • Page 246 Boonton 4540 Series RF Power Meter Step 9: The Sensor Calfactor Uncertainty needs to be interpolated from the uncertainty values in the Boonton Electronics Power Sensor Manual. At 1 GHz, the sensor’s calfactor uncertainty is 2.23%, and at 0.5GHz it is 1.99%. Note, however, that we are performing our AutoCal at a frequency of 1GHz, which is very close to the measurement frequency.

  • Page 247: Maintenance

    Correct any problems you discover and conduct a performance test to verify that the instrument is operational. (See section 7.5 Performance Verification). If the malfunction persists of the instrument fails the performance verification, contact Boonton Electronics for service. 7.4 Lithium Batteries The 4540 Series contains a socketed BR2325 coin cell Lithium battery to provide non-volatile storage of start-up information.

  • Page 248: Firmware Upgrade

    Operating firmware has been loaded into the 4540 Series instrument at the factory. This consists of the proprietary Operating System and the Boonton Electronics 4540 Series Application Firmware. The Application Firmware will be updated from time to time to correct errors and add new features.
  • Page 249 Boonton 4540 Series RF Power Meter How to Start Up in Boot Loader Mode From a powered-down state, press and hold the top and bottom blue soft keys simultaneously (located next to the display). Press the green power key. After a few seconds the instrument should display a text screen with the heading ―...
  • Page 250 Boonton 4540 Series RF Power Meter This page intentionally left blank. Appendix A...

  • Page 251: Appendix A Scpi Error Messages

    Boonton 4540 Series RF Power Meter 8. Appendix A SCPI Error Messages 8.1 SCPI Error Messages MESSAGE DESCRIPTION ― No Error‖ -100 "Command Error" -101 ― SubCmd not found‖ -102 "Syntax error" -103 ― Too many qry‖ -108 "Parameter not allowed"...
  • Page 252 Boonton 4540 Series RF Power Meter MESSAGE DESCRIPTION -245 "Sensor Disconnected." -246 ― Sensor voltage error‖ -247 "No Calibrator" The calibrator is not responding to instrument control. -248 "Keyboard error" -249 "FPGA download err" -250 ― Disk File error‖ -252 ―...
  • Page 253 Boonton 4540 Series RF Power Meter MESSAGE DESCRIPTION -342 "Temp comp pwr non-mono" -343 "Temp comp pwr out range" -344 "Temp comp temp non-mono" -345 "Temp comp temp out range" -346 "Temp comp table length" -347 "Err expand TC" -348 "Temp comp # pwr entries"...
  • Page 254 Boonton 4540 Series RF Power Meter This page intentionally left blank. Appendix A...

  • Page 255: Appendix B Model 2530 1Ghz Calibrator

    9.1 Description The Model 2530 operates as an accessory of the Boonton 4530 or 4540 Series RF Power Meters to provide calibration and test signals at an output frequency of 1.024 GHz. The Model 2530 is controlled by the power meter through its manual and remote programming systems.

  • Page 256: Specifications

    Type BNC, rear panel, TTL compatible Controller connector: RJ-11 Controller: Boonton 4530 or 4540 Series RF Power Meter Physical and Environmental Case Dimensions: 8.4W x 3.5H x 13.5D inches (21.3 x 8.9 x 34.3 cm), Half-rack width, 2U height Weight: 7.7 lbs (3.5kg)

  • Page 257: Connections

    9.5 Connections Plug the supplied RJ-11 cable into the rear panel jack of the 2530 and into the rear panel jack of a BOONTON 4530 or 4540 Series RF Peak Power Meter. Note that the 4540 connection requires use of the enclosed RJ11- to-HDB15 adapter (p/n 95125001A) to connect the calibrator cable via the EXT CAL/VGA OUT connector.
  • Page 258 Boonton 4540 Series RF Power Meter This page intentionally left blank. Appendix B...

  • Page 259: Appendix C Boonton Eula

    IMPORTANT-READ CAREFULLY: This End-User License Agreement ("EULA") is a legal agreement between you (either an individual or a single entity) and Boonton Electronics, a subsidiary of the Wireless Telecom Group, Inc., for the Boonton Electronics software product identified above, which includes instrument software and may include associated media, printed materials, "online"...
  • Page 260 10. ENTIRE AGREEMENT. This EULA (including any addendum or amendment to this EULA which is included with the Product) are the entire agreement between you and Boonton Electronics relating to the Product and the support services (if any) and they supersede all prior or contemporaneous oral or written communications, proposals and representations with respect to the Product or any other subject matter covered by this EULA.

  • Page 261: Appendix D Warranty & Repair

    The sensor must be returned in its original packing container. If the original container is not available, Boonton Electronics will ship a replacement container and you will be billed for the container cost and shipping charges. If a new sensor is ordered, note that it does not include a sensor cable - this item must be ordered separately.
  • Page 262 THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUD-ING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PAR-TICULAR PURPOSE. Boonton will not be liable for any incidental damages or for any consequential damages, as defined in Section 2-715 of the Uniform Commercial Code, in connection with products covered by the foregoing warranties.

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