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Giga-tronics 2502B Operation Manual

2500b series, microwave signal generators
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Giga-tronics 2500B Series Microwave Signal Generators
2500B Series Microwave Signal Generators
Operation Manual
Operation Manual, Part Number 34737, Rev C, June 30, 2011

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  • Page 1 Giga-tronics 2500B Series Microwave Signal Generators 2500B Series Microwave Signal Generators Operation Manual Operation Manual, Part Number 34737, Rev C, June 30, 2011...

  • Page 2: Contact Information

    This warranty DOES NOT cover damage resulting from improper use, nor workmanship other than Giga-tronics service. There is no implied warranty of fitness for a particular purpose, nor is Giga-tronics liable for any consequential damages. Specification and price change privileges are reserved by Giga-tronics.
  • Page 3 Microwave Signal Generator 2500B Series Model Numbers: 2502B, 2508B, 2520B, 2526B, 2540B, 2550B Declaration of Conformity on file. Contact Giga-tronics at the following; Giga-tronics, Incorporated 4650 Norris Canyon Road San Ramon, California 94583 Telephone: 800.726.4442 (only within the United States) 925.328.4650...
  • Page 4 Giga-tronics 2500B Series Microwave Signal Generators Record of changes to this Manual Use the table below to maintain a permanent record of changes to this document. Replacement pages are issued as a TPCI (Technical Publication Change Instruction), and must be inserted at the front of the manual’s binder. Remove the corresponding old pages, insert the new pages, and record the changes here.

  • Page 5: Table Of Contents

    ..............................3 HAPTER NTRODUCTION 2.1 Overview ..................................3 2.2 Giga-tronics 2500B Microwave Signal Generator Summary ..................3 2.3 Configuration Information ............................4 2.3.1 Special Configurations ............................4 2.4 Receiving and Inspection .............................. 5 2.5 Prepare the 2500B for Use ............................6 2.5.1 Cooling Considerations ............................
  • Page 6 Giga-tronics 2500B Series Microwave Signal Generators 5.3 Generate an Externally Modulated AM Signal ......................41 5.4 FM Menu Description ..............................44 5.5 Generate an Internally Modulated FM Signal ......................50 5.6 Generate an Externally Modulated FM Signal ......................52 5.7 Generate an Externally Phase Modulated Signal ......................54 5.8 Pulse Modulation (PM) Menu Description .........................
  • Page 7 Table 5: Reset the 2500B to Default Values..........................8 Table 6: Replace the 2500B Line Fuse ............................. 9 Table 7: Contacting Giga-tronics Customer Service ......................10 Table 8: 2500B Front Panel ..............................12 Table 9: 2500B Display Description ............................14 Table 10: Modify a Menu Parameter ............................
  • Page 8 Giga-tronics 2500B Series Microwave Signal Generators Table 44: Maximum Leveled Output Power in dBm - Option 20 ..................92 Table 45: Minimum Leveled RF Output Power In dBm ......................93 Table 46: RF Power level Accuracy in dB ..........................93 Table 48: SSB Phase Noise - Option 28A ..........................
  • Page 9 Giga-tronics Series 2500B Microwave Signal Generators List of Figures Figure 1: 2500B Start Up ................................. 7 Figure 2: 2500B Fuse Holder ..............................9 Figure 3: 2520B Front Panel ..............................11 Figure 4: Functional Areas of the 2500B Display ........................14 Figure 5: Structure of the 2500B Menus ..........................
  • Page 10 Giga-tronics 2500B Series Microwave Signal Generators Figure 43: Ref Tune Input Circuit ............................80 Figure 44: Language Menu 1 ..............................82 Figure 45: Language Menu 2 ..............................84 Figure 46: Language Menu 3 ..............................85 Figure 47: 2500B Mechanical Specifications ......................... 87 Figure 48: Setup;...

  • Page 11: Chapter 1 Safety And Manual Conventions

    A liquid or foreign substance falls into the instrument The instrument generates an abnormal sound, smell, smoke, or sparking light. If any of the above conditions occurs, contact Giga-tronics to get the instrument repaired. WARNING Continuing to operate the instrument with any of the above conditions could cause death or serious damage to the instrument and any equipment connected to it.

  • Page 12: Graphic Symbols For Front Panel Buttons

    Safety and Manual Conventions Giga-tronics 2500B Series Microwave Signal Generators 1.6 Graphic Symbols for Front Panel Buttons (Refer to Figure 3 on page 11) Softkeys are adjacent to menu items that appear in the right-side area of the display. Pressing a softkey selects a menu item, which makes the menu item modifiable, or opens a submenu.

  • Page 13: Chapter 2 Introduction

    2.2 Giga-tronics 2500B Microwave Signal Generator Summary The Giga-tronics 2500B series of microwave generators are high-performance, flexible instruments ideal for research and development (R & D) and manufacturing environments. Among the characteristics that make the 2500B series an excellent choice for a wide variety of applications are:...

  • Page 14: Configuration Information

    Introduction Giga-tronics 2500B Series Microwave Signal Generators 2.3 Configuration Information Specific information regarding each 2500B is included on the serial number label on the rear of the instrument. The information on this label is described below. Table 1: 2500B Serial Number Label...

  • Page 15: Receiving And Inspection

    NOTE: for complete information about Automation Xpress, refer to the 2500B Programming Manual, Part Number 34783. If any of the contents are damaged or missing, contact Giga-tronics immediately. Refer to the Contact Information on page ii of this manual. End of procedure...

  • Page 16: Prepare The 2500B For Use

    Introduction Giga-tronics 2500B Series Microwave Signal Generators 2.5 Prepare the 2500B for Use 2.5.1 Cooling Considerations The 2500B has an internal cooling fan. The air intake is located on the rear panel of the instrument. When placing or installing the instrument for use, ensure there are no obstructions to the flow of air into the instrument, nor obstruction for exhaust air flow at either side of the instrument.

  • Page 17: Start-Up The 2500B

    Giga-tronics 2500B Series Microwave Signal Generators Introduction 2.5.3 Start-up the 2500B Table 4 below describes how to start-up the 2500B. Table 4: Start-Up the 2500B Start-Up the 2500B Step Action Place the 2500B in the location where it will be used, observing the recommendations in section 2.5 on page 6.

  • Page 18: Reset The 2500B To Factory-Default Values

    Introduction Giga-tronics 2500B Series Microwave Signal Generators 2.5.4 Reset the 2500B to Factory-Default Values The 2500B uses non-volatile memory (NVRAM), which is preserved with a battery for storing the instrument’s current state, saved setups, and lists. If you want to return these saved settings in NVRAM to the default values they were set to at the factory, perform the procedure below.

  • Page 19: Replace The Ac Line Fuse

    If the AC line fuse in the 2500B continues to blow, it’s usually an indication of internal problems. If this occurs, contact Giga-tronics for help (see Table 7 on page 10). Table 6 below describes how to replace the fuse in the 2500B.

  • Page 20: Shipping, Repair, And Calibration

    FRAGILE — DELICATE INSTRUMENT 2.6.2 Repairs The Giga-tronics 2500B microwave signal generator is a robust instrument that has been designed and built for years of trouble-free service. However, if you experience problems with the instrument, do the following: 1. Contact your local Giga-tronics sales office, or the factory, and be prepared to provide the model, serial number, and any included options of your instrument, and a description of the problem.

  • Page 21: 2500B Front Panel

    Giga-tronics 2500B Series Microwave Signal Generators Introduction 2.7 2500B Front Panel Figure 3, below, describes the main features of the front panel of the 2500B. Refer to the tables on the following pages for detailed descriptions of the parts of the front panel.

  • Page 22: Table 8: 2500B Front Panel

    Introduction Giga-tronics 2500B Series Microwave Signal Generators Table 8: 2500B Front Panel 2500B Front Panel Name Description POWER button Puts the 2500B into one of two states: STANDBY; power is applied to the internal timebase oscillator. This is to maintain timebase stability when the 2500B is not in use.
  • Page 23 Giga-tronics 2500B Series Microwave Signal Generators Introduction 2500B Front Panel Name Description RF On/Off Indicator This indicator has two states: BLUE indicates the 2500B RF output is active. NOT illuminated indicates the RF output is not active. RF Output The connector type of the RF Output is determined by the upper frequency limit of...

  • Page 24: Menus

    Introduction Giga-tronics 2500B Series Microwave Signal Generators 2.7.1 Menus Menus appear on the front panel display of the 2500B. The figure below shows the CW menu to illustrate the common areas of all menus. Figure 4: Functional Areas of the 2500B Display...
  • Page 25 Giga-tronics 2500B Series Microwave Signal Generators Introduction 2500B Display Description Area of Display Description Mode This area may contain one of the following codes: OFS appears if a power offset greater than 0 dB is set in the CW menu.

  • Page 26: Menu Structure

    Introduction Giga-tronics 2500B Series Microwave Signal Generators 2.7.2 Menu Structure Figure 5 below shows the structure of the menus of the 2500B. To access the menus, you must first press one of the blue Menu buttons (see Figure 3 on page 11).

  • Page 27: Access The Menus

    Giga-tronics 2500B Series Microwave Signal Generators Introduction 2.7.3 Access the Menus In local operation, the 2500B menus are accessed via the Menu buttons or Local button on the front panel (see Figure 3 on page 11). Pressing a Menu button causes the menu for that button to appear on the display. The Menu...

  • Page 28: Modify The Step Size

    Introduction Giga-tronics 2500B Series Microwave Signal Generators 2.7.6 Modify the Step Size The step size for a parameter can be modified as described below. Table 11: Change the Step Size of a Parameter Change the Step Size of a Parameter...

  • Page 29: 2500B Rear Panel

    Giga-tronics 2500B Series Microwave Signal Generators Introduction 2.8 2500B Rear Panel Figure 6 below shows the locations of the components on the 2500B rear panel. Descriptions of the rear panel components are on the following pages. Figure 6: 2500B Rear Panel...

  • Page 30: Table 12: 2500B Rear Panel

    Introduction Giga-tronics 2500B Series Microwave Signal Generators Table 12: 2500B Rear Panel 2500B Rear Panel Name Description EXT ALC In external leveling, the RF output of the 2500B is detected by either a positive or negative crystal detector, or power meter with an analog output. The signals from...
  • Page 31 Giga-tronics 2500B Series Microwave Signal Generators Introduction 2500B Rear Panel Name Description NETWORK ANALYZER BLANKING A +5 Volt output signal occurring at band crossings, filter switches, and retraces for the duration of those events. RAMP OUT A 0 to 10 Volt ramp output scaled to the frequency sweep.

  • Page 32: Chapter 3 Cw Operation

    CW Operation Giga-tronics 2500B Series Microwave Signal Generators Chapter 3 CW Operation This section describes the CW Menu of the 2500B, and includes an example procedure for generating a CW signal. The CW specifications of the 2500B start on page 86.

  • Page 33: Table 13: Cw Menu

    Giga-tronics 2500B Series Microwave Signal Generators CW Operation Table 13: CW Menu CW Menu Parameter Description Frequency The instrument’s center frequency. The range of the center frequency is dependent on the model number and options of the instrument. Power The output power level of the selected frequency. The range of the output power level also depends on the Power Offset and Power Slope settings in the CW menu, as well as other settings of the instrument.

  • Page 34: Generate A Cw Signal

    CW Operation Giga-tronics 2500B Series Microwave Signal Generators 3.2 Generate a CW Signal This procedure describes how to setup the 2500B to generate a CW signal with the following characteristics: Frequency: 1.250 GHz Power: 1 dBm Power offset: adjust as necessary to compensate for losses in test setup...
  • Page 35 Giga-tronics 2500B Series Microwave Signal Generators CW Operation Generate a CW Signal Step Action The step attenuator, if installed, can be set to one of two modes: Auto Mode: In this mode, the step attenuator automatically switches attenuation state as the instrument’s output power level setting is varied.
  • Page 36 CW Operation Giga-tronics 2500B Series Microwave Signal Generators Generate a CW Signal Step Action To compensate for a loss that varies linearly with frequency; Softkey 1. Select Power Slope. 2. Enter the desired correction factor using the numeric keypad, keys, or .

  • Page 37: Chapter 4 Ramp Operation

    Giga-tronics 2500B Series Microwave Signal Generators Ramp Operation Chapter 4 Ramp Operation This chapter describes in detail the menus and parameters in the Ramp Menus. This chapter includes example procedures for using the 2500B front panel controls to setup ramps.

  • Page 38: Table 15: Ramp Menus

    Ramp Operation Giga-tronics 2500B Series Microwave Signal Generators Table 15: Ramp Menus Ramp Menus Submenu Parameter Figure 10: Ramp Freq Start/Stop Sweep Menu Ramp Freq Start Frequency This is the starting frequency of the frequency sweep. The start Start/Stop Sweep frequency must be less than the stop frequency.

  • Page 39: Figure 11: Ramp Freq Center/Span Sweep Menu

    Giga-tronics 2500B Series Microwave Signal Generators Ramp Operation Ramp Menus Submenu Parameter Figure 11: Ramp Freq Center/Span Sweep Menu Ramp Freq Center Freq The center frequency of the frequency span that is swept. Center/Span Span This menu item displays and allows you to modify the frequency range of the ramp (sweep).

  • Page 40: Figure 12: Ramp Power Sweep Menu

    Ramp Operation Giga-tronics 2500B Series Microwave Signal Generators Ramp Menus Submenu Parameter Figure 12: Ramp Power Sweep Menu Ramp Power This function sweeps the RF output power level linearly from a start power level to a Sweep Menu stop power level in a set duration, then repeats the sweep. The power level can sweep from a lower to a higher power level, or in the reverse direction.

  • Page 41: Figure 13: Step Freq Sweep Menu

    Giga-tronics 2500B Series Microwave Signal Generators Ramp Operation Ramp Menus Submenu Parameter Figure 13: Step Freq Sweep Menu Step Freq Sweep This menu allows you to view and modify settings for the frequency sweep feature. Menu Note the following: (see Figure 13)

  • Page 42: Figure 14: Intensity Marker Menu

    Ramp Operation Giga-tronics 2500B Series Microwave Signal Generators Ramp Menus Submenu Parameter Figure 14: Intensity Marker Menu Intensity Marker The Intensity Marker Menu allows you to view and modify settings related to the Menu instrument’s Intensity Markers used in conjunction with the frequency sweep. Five (see Figure 14) intensity markers can be set.

  • Page 43: Figure 15: Amplitude Marker Menu

    Giga-tronics 2500B Series Microwave Signal Generators Ramp Operation Ramp Menus Submenu Parameter Figure 15: Amplitude Marker Menu Amplitude Markers The Amplitude Marker Menu allows you to view and modify settings related to the Menu instrument’s Amplitude Markers used in conjunction with the frequency sweep. Five (see Figure 15) amplitude markers can be set.

  • Page 44: Generate A Frequency-Swept Signal

    Ramp Operation Giga-tronics 2500B Series Microwave Signal Generators 4.2 Generate a Frequency-Swept Signal This procedure describes how to set up a signal at a constant power level that sweeps linearly from a start frequency to a stop frequency over a set duration, then repeats the sweep. The signal will be set up with the following characteristics: Start frequency: 1.00 GHz...

  • Page 45: Generate A Power-Swept Signal

    Giga-tronics 2500B Series Microwave Signal Generators Ramp Operation 4.3 Generate a Power-Swept Signal This procedure describes how to set up the 2500B to generate a signal at a constant frequency that sweeps linearly from a set start power level to a set stop power level over a set amount of time, and repeats the sweep. The signal will be setup with the following characteristics: Start power: 0.00 dBm...

  • Page 46: Chapter 5 Modulation Operation

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators Chapter 5 Modulation Operation This section describes the modulation menus in the 2500B, and includes example procedures for setting up modulated test signals. NOTE: This section only applies to instruments with Option 17A or Option 17B installed.

  • Page 47: Table 18: Am Menus

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Table 18: AM Menus AM Menus Submenu Parameter Figure 17: AM External Menu AM Ext Menu The AM External Menu allows you to view and modify settings for external amplitude modulation mode. In this mode, the RF output signal is modulated (see Figure 17) according to the signal that is applied to the rear panel AM IN connector.

  • Page 48: Figure 18: Am Internal Waveform

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators AM Menus Submenu Parameter Figure 18: AM Internal Waveform AM Int Menu The AM Internal Waveform menu allows you to view and modify settings in which the modulating signal is an internally-generated sine, triangle, ramp, or square (see Figure 18) waveform (the signal at the AM IN connector is not used).

  • Page 49: Figure 19: Am - Internal Noise Menu

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation AM Menus Submenu Parameter Figure 19: AM - Internal Noise Menu AM Int Noise Menu The AM - Internal Noise menu allows you to view and modify settings related to an (see Figure 19) internal amplitude modulation mode in which the modulating signal is an internally- generated Gaussian noise source (the signal at the AM IN connector is not used).

  • Page 50: Generate An Internally Modulated Am Signal

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators 5.2 Generate an Internally Modulated AM Signal The procedure below describes how to generate an AM signal with the following characteristics: Carrier frequency = 1.00 GHz Carrier power = 1.00 dBm Depth of AM modulation = 20 %...

  • Page 51: Generate An Externally Modulated Am Signal

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Generate an Internally Modulated AM Signal Step Action In the AM — Internal Waveform submenu, set the following parameters: Soft Button 1. Turn on AM modulation; press Soft Button 2. Set the depth of AM modulation; press Depth.

  • Page 52: Table 20: Generate An Externally Modulated Am Signal

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators Table 20: Generate an Externally Modulated AM Signal Generate an Externally Modulated AM Signal Step Action Verify that the RF output is NOT energized by checking the RF on/off indicator on the front of the RF ON 2500B (see Figure 3 on page 11).
  • Page 53 Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Generate an Externally Modulated AM Signal Step Action Energize the output of the external AM modulation source. Energize the RF output of the 2500B. End of Procedure Operation Manual, Part Number 34737, Rev C, June 30, 2011...

  • Page 54: Fm Menu Description

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators 5.4 FM Menu Description Pressing the FM menu button displays the FM Main Menu. From here, you can choose from among five submenus for modifying parameters for frequency and phase modulation. See Figure 20.

  • Page 55: Table 21: Fm Menus

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Table 21: FM Menus FM Menus Submenu Parameter Figure 21: FM External Menu FM Ext Menu The FM External menu allows you to view and modify settings for external frequency modulation mode, which is used when the modulating signal is provided (see Figure 21) externally.

  • Page 56: Figure 22: Dc Fm Menu

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators FM Menus Submenu Parameter Figure 22: DC FM Menu DC FM Menu In DC FM mode, the RF output signal is modulated by an external signal that is applied to the rear panel FM/φM IN connector. Note the following: (see Figure 22) DC FM is available on all models including models with option 17A.

  • Page 57: Figure 23: Fm Internal Menu

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation FM Menus Submenu Parameter Figure 23: FM Internal Menu FM Int Menu Allows you to view and modify settings related to an internal frequency modulation (see Figure 23) mode in which the modulating signal is an internally-generated sine, triangle, ramp, or square waveform (the signal at the FM/φM IN connector is not used).

  • Page 58: Figure 24: Φm External Menu

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators FM Menus Submenu Parameter Figure 24: ΦM External Menu ΦM Ext Menu The ΦM External menu allows you to view and modify settings for external phase modulation mode, which is used when the modulating signal is provided externally.

  • Page 59: Figure 25: Φm Internal Menu

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation FM Menus Submenu Parameter Figure 25: ΦM Internal Menu ΦM Int Menu The ΦM -Internal menu allows you to view and modify settings related to an (see Figure 25) internal phase modulation mode in which the modulating signal is an internally-generated sine, triangle, ramp, or square wave-form (the signal at the FM/φM IN connector is not used).

  • Page 60: Generate An Internally Modulated Fm Signal

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators 5.5 Generate an Internally Modulated FM Signal The procedure below describes how to generate an internally-modulated FM signal with the following characteristics: Carrier frequency = 1.00 GHz Carrier power = 1.00 dBm...
  • Page 61 Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Generate an Internally Modulated FM Signal Step Action Soft Button Press Deviation. Set the FM deviation to 200 Hz: 1. On the numeric keypad on the front panel of the 2500B, enter 200.

  • Page 62: Generate An Externally Modulated Fm Signal

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators 5.6 Generate an Externally Modulated FM Signal The procedure below describes how to generate an FM signal that uses an external FM modulation source connected to the 2500B. An FM signal is created with the following characteristics: Carrier frequency = 1.00 GHz...
  • Page 63 Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Generate an Externally Modulated FM Signal Step Action Press the Menu button. The FM Main Menu opens in the display. Soft Button In the FM Main Menu, press FM Ext Menu. The FM — External Waveform menu opens (see Figure 21 on page 45).

  • Page 64: Generate An Externally Phase Modulated Signal

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators 5.7 Generate an Externally Phase Modulated Signal The procedure in this section describes how to generate a phase-modulated (ΦM) signal from the 2500B using an external phase modulation source connected to the 2500B. The ΦM signal is set up to have the following characteristics: Carrier frequency = 4.00 GHz...
  • Page 65 Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Generate an Externally Phase Modulated Signal Step Action Soft Button In the FM Main Menu, press ΦM Ext Menu. The ΦM — External Waveform menu opens (see Figure 21 on page 45).

  • Page 66: Pulse Modulation (Pm) Menu Description

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators 5.8 Pulse Modulation (PM) Menu Description Pressing the PM menu button provides access to the internal and external pulse modulation features of the instrument. Figure 26 illustrates the PM Main menu and five submenus.

  • Page 67: Table 25: Pm Menus

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation Table 25: PM Menus PM Menus Submenu Parameter Figure 27: PM External Menu PM Ext Menu The PM External menu allows you to view and modify settings for external pulse (see Figure 27) modulation mode, which is used when the modulating signal is provided externally.

  • Page 68: Figure 28: Pm Internal Continuous Menu

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators PM Menus Submenu Parameter Figure 28: PM Internal Continuous Menu PM Int Cont Menu The PM Internal Continuous menu produces a continuous pulse-modulated RF output (see Figure 28) with pulse characteristics determined by an internally-generated pulse signal (any signal at the PULSE IN/PM TRIG IN connector is ignored).

  • Page 69: Figure 29: Pm Internal Gated Menu

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation PM Menus Submenu Parameter Figure 29: PM Internal Gated Menu PM Int Gated Menu The PM Internal Gated menu allows you to view and modify the internal gated pulse (see Figure 29) modulation mode.
  • Page 70 Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators PM Menus Submenu Parameter PM Int Gated Menu, Synch Out Delay Determines the amount of delay that occurs between the leading continued edge of the pulse video and the leading edge of the sync pulse at the PM SYNC OUT (see Figure 29) connector.

  • Page 71: Figure 30: Pm Internal Triggered Menu

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation PM Menus Submenu Parameter Figure 30: PM Internal Triggered Menu PM Int Trig Menu The PM Internal Triggered menu allows you to view and modify settings for internal (see Figure 30) triggered pulse modulation mode. In this mode, the instrument produces a single RF pulse at the RF output connector whenever it receives a valid trigger signal at the rear- panel PULSE IN/PM TRIG IN connector.
  • Page 72 Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators PM Menus Submenu Parameter PM Int Trig Menu, Width This menu item allows you to view and modify the width of the pulse that Continued appears at the RF out-put connector when an appropriate triggering signal is applied (see Figure 30) to the rear-panel PULSE IN/PM TRIG IN connector.

  • Page 73: Figure 31: Pm Burst Mode Menu

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation PM Menus Submenu Parameter Figure 31: PM Burst Mode Menu PM Burst Menu PM This menu item turns pulse modulation on and off. Pressing the adjacent softkey or the Step Up or Step Down buttons toggles the PM state. The PM indicator appears in (see Figure 31) the upper right-hand corner of the display when pulse modulation is turned on.

  • Page 74: Figure 32: Pm Burst Mode Menu 2

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators PM Menus Submenu Parameter Figure 32: PM Burst Mode Menu 2 PM Burst Menu 2 Trigger Type You can choose from three different trigger types by using the softkey, or the Step Up or Step Down keys. The three trigger types are:...

  • Page 75: Generate An External Pulse-Modulated Signal

    Giga-tronics 2500B Series Microwave Signal Generators Modulation Operation 5.9 Generate an External Pulse-Modulated Signal This procedure describes how to set up the 2500B to generate a signal that is pulse modulated by an external source. When this type of pulse modulation is used, the RF output signal is pulsed according to the signal that is applied to the rear-panel PULSE IN/PM TRIG IN connector.

  • Page 76: Table 26: Generate An Externally Pulse Modulated Signal

    Modulation Operation Giga-tronics 2500B Series Microwave Signal Generators Table 26: Generate an Externally Pulse Modulated Signal Generate an Externally Pulse-Modulated Signal Step Action Perform steps 1 through 10 of the procedure Generate a CW Signal on page 24 to set the frequency and power level of the carrier.

  • Page 77: Chapter 6 Special Modes

    Giga-tronics 2500B Series Microwave Signal Generators Special Modes Chapter 6 Special Modes The 2500B has special modes that accommodate a wide variety of test configurations. These modes are: Cable Correction; Creates a power level correction-versus-frequency table to change the power output of the 2500B.

  • Page 78: Use Cable Correction

    Model 2500B series Microwave Signal Generator with firmware version 4.09 or higher Giga-tronics 8650A or 8650B series Universal Power Meter Giga-tronics 803XXA series CW Power Sensor, or other sensor appropriate to the frequency range and signal type to be calibrated (with power sensor cable)

  • Page 79: Table 27: Use Cable Correction

    Giga-tronics 2500B Series Microwave Signal Generators Special Modes Table 27: Use Cable Correction Use Cable Correction Step Action Configure the 8650A/B series Universal Power Meter On the front of the 8650A/B series Power Meter, select the following: Softkey Meter Setup...

  • Page 80: Figure 35: Cable Connection Setup

    System On the front of the 2500B, press Softkey Select Cable Cal Menu. Softkey Select Device Name, and select the Giga-tronics 8650A/B series Power Meter using Softkey Select Interface. Softkey Press Cable Cal to begin the swept frequency characterization. After the frequency sweep is completed, a cable correction table will be generated and automatically applied to the output of the 2500B.

  • Page 81: Use External Alc

    Giga-tronics 2500B Series Microwave Signal Generators Special Modes 6.2 Use External ALC One application of this procedure would be a test setup where cables and fixtures connecting to the DUT incur significant losses, and you want to deliver a precise, known power level to the DUT under dynamic conditions.

  • Page 82: Table 28: External Alc Using A Crystal (Diode) Detector

    Special Modes Giga-tronics 2500B Series Microwave Signal Generators Table 28: External ALC Using a Crystal (Diode) Detector External ALC Using a Crystal (Diode) Detector Step Action Connect the RF output of the 2500B to a power splitter or directional coupler that is placed as close to the DUT as possible.

  • Page 83: Table 29: External Alc Using A Power Meter

    Giga-tronics 2500B Series Microwave Signal Generators Special Modes Table 29: External ALC Using a Power Meter External ALC Using a Power Meter Step Action Connect the sensor of the power meter to the appropriate port of the power splitter or directional coupler.

  • Page 84: Use The External Reference Input

    Special Modes Giga-tronics 2500B Series Microwave Signal Generators 6.3 Use the External Reference Input Internally, the 2500B generates a 100 MHz reference signal for the instrument. This reference signal is normally phase- locked to a high-stability internal 10 MHz signal.

  • Page 85: Chapter 7 System Menus

    Giga-tronics 2500B Series Microwave Signal Generators System Menus Chapter 7 System Menus 7.1 System Menus Description The System menus gives you access to system-level settings, such as memory storage locations, GPIB address configuration, display contrast, and system volume control. System information, including the model number, serial number, firmware version, etc., can also be displayed.
  • Page 86 System Menus Giga-tronics 2500B Series Microwave Signal Generators Table 31: System Menus System Menus Submenu Action or Parameter Figure 38: System Menu System Menu Attenuation Provides control of the step attenuator if it is installed in the instrument. (see Figure 38) The step attenuator option can insert up to 90 dB of attenuation (110 dB with option 27) into the RF output path of the instrument.

  • Page 87: Table 32: System Menu - Connectivity

    Giga-tronics 2500B Series Microwave Signal Generators System Menus Table 32: System Menu - Connectivity System Menu - Connectivity Submenu Action or Parameter Figure 39: Connectivity Menu Connectivity GPIB Address Allows you to set the instrument’s General-Purpose Interface Bus (GPIB) Menu address.

  • Page 88: Table 31: System Menus

    System Menus Giga-tronics 2500B Series Microwave Signal Generators Table 33: System Menu – Service Submenu System Menu – Service Submenu Submenu Action or Parameter Figure 40: Service Menu Service Menu Save Allows you to save the current state of the instrument to non-volatile memory, so that the saved state can subsequently be restored.

  • Page 89: Table 34: System Menu -Ethernet Submenu

    Giga-tronics 2500B Series Microwave Signal Generators System Menus System Menu – Service Submenu Submenu Action or Parameter Service Menu, Contrast This menu item allows you to set the contrast of the instrument’s front panel display. The Continued contrast range is 1 to 15, where 1 represents most contrast and results in the darkest display, and 15 represents least contrast and results in the lightest display.

  • Page 90: Use The Ref Tune Function

    System Menus Giga-tronics 2500B Series Microwave Signal Generators 7.2 Use the Ref Tune Function Why use this procedure: Use this function when you want to phase-lock the output frequency of the 2500B with a stable, external frequency source. See Figure 42 below.

  • Page 91: Table 35: Use The Ref Tune Feature

    Giga-tronics 2500B Series Microwave Signal Generators System Menus Table 35: Use the Ref Tune Feature Use the Ref Tune Feature Step Action Connect a cable with a BNC connector between the REF TUNE connector on the rear panel of the 2500B and the controlling source.

  • Page 92: Chapter 8 Language Menus

    Language Menus Giga-tronics 2500B Series Microwave Signal Generators Chapter 8 Language Menus There are three Language menus that allow you to choose the language to be used by the instrument during remote operation. NOTE: Complete information for remotely programming the 2500B via a host computer is available in the 2500B Programming Manual, Part Number 34783.

  • Page 93: Table 36: Language Menus

    SCPI is one of the standard remote language choices that are available. To choose SCPI as the remote language, select this menu item. GT12000 This menu item allows you to select the Giga-tronics Series 12000A native command set as the language to be used by the instrument during remote operations.

  • Page 94: Figure 45: Language Menu 2

    Language Menus Giga-tronics 2500B Series Microwave Signal Generators Language Menus Menu Parameter Figure 45: Language Menu 2 Press softkey HP8340 This menu item allows you to select HP 8340 command emulation as the Language 2/3 to language to be used by the instrument during remote operations.

  • Page 95: Figure 46: Language Menu 3

    Giga-tronics 2500B Series Microwave Signal Generators Language Menus Language Menus Menu Parameter Figure 46: Language Menu 3 Press softkey Language Menu 3 allows you to view and choose the language to be used by the Language 3/3 to instrument during remote operation. The remote language that will be used by...

  • Page 96: Chapter 9 Performance Verification

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Chapter 9 Performance Verification This section is comprised of two sub-sections: Specifications; contains the operating specifications of the 2500B Verification; contains the procedures for verifying that the 2500B is operating within its design specifications 9.1 Specifications...

  • Page 97: Figure 47: 2500B Mechanical Specifications

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Figure 47: 2500B Mechanical Specifications NOTE: These drawings show the 2500B with the rack-mounting hardware installed. Operation Manual, Part Number 34737, Rev C, June 30, 2011 Page 87...

  • Page 98: Table 38: 2500B Series Model Frequency Ranges

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 38: 2500B Series Model Frequency Ranges 2500B Series Model Frequency Ranges Model Number Frequency Range RF Output Connector 2502B 100 kHz to 2.5 GHz Type-N (F) 2508B* 2 GHz to 8 GHz...

  • Page 99: Table 40: Frequency Bands

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 40: Frequency Bands Frequency Bands Band Frequency N (Band index) 0.1 to ≤ 10 MHz > 10 to ≤ 15.625 MHz > 15.625 to 31 ≤ MHz > 31 to 63 MHz >...
  • Page 100 Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 41: Spectral Purity Spectral Purity Maximum leveled output power or +10 dBm, whichever is lower. Specifications for harmonics above instrument frequency range are nominal. 100 kHz to 10 MHz -30 dBc Harmonics >...

  • Page 101: Table 42: General Power Specifications

    Specification applies over 0 °C to 35 °C range and degrades < 2 dB from 35 °C to 55 °C Specification for the 2502B applies to its maximum frequency of 2.5 GHz 2540B and 2550B maximum leveled output power is specified down to 1 MHz only.

  • Page 102: Table 44: Maximum Leveled Output Power In Dbm - Option 20

    Specification applies over 0 °C to 35 °C range and degrades < 2 dB from 35 °C to 55 °C Specification for the 2502B applies to its maximum frequency of 2.5 GHz 2540B and 2550B maximum leveled output power is specified down to 1 MHz only.

  • Page 103: Table 45: Minimum Leveled Rf Output Power In Dbm

    Specification applies over 0 °C to 35 °C range and degrades < 2 dB from 35 °C to 55 °C Specification for 2502B applies to its maximum frequency of 2.5 GHz For the 2550B, frequency crossing is at 39.6 GHz instead of 40 GHz...

  • Page 104: Table 48: Ssb Phase Noise - Option 28A

    Ramp Power Sweep 0 to 25 dB Power Slope (CW Mode, List Mode) 0 to 0.5 dB/GHz 0 to 10 V and 0.5 V/GHz (2502B, 2508B and 2520B) or Ramp Output 0.25 V/GHz (2526B, 2540B and 2550B) Z-Axis Blanking +5 V (positive only) Sweep Time (Rate must be <...
  • Page 105 Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 51: Amplitude Modulation Amplitude Modulation (Specifications apply to frequencies above 10 MHz) Parameter Specification Depth 0 to 90 % (Level = 0 dBm) Rate (3 dB Bandwidth at carrier level of 0 dBm)

  • Page 106: Table 53: Phase Modulation

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 53: Phase Modulation Phase Modulation (Specifications apply to frequencies above 10 MHz) Parameter Specification Rate (3 dB Bandwidth) 100 Hz to 100 kHz Peak Deviation 10 rad-pk/N Accuracy ± 5 % at 1 kHz rate with 1 V peak input, 3.83 rad/Vpk sensitivity...

  • Page 107: Table 55: List Mode

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 55: List Mode List Mode Parameter Specification Number of List Points 4000 Standard 2 ms to 1 s Step Time Option 29 150 s to 1 s Trigger Modes EXT, GPIB GET, Software...

  • Page 108: Table 57: Internal Modulation Generator

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 57: Internal Modulation Generator Internal Modulation Generator Parameter Specification AM Modulation Source Waveforms Sine, Square, Triangle, Ramp, Gaussian Noise Rate 0.01 Hz to 100 kHz for all waveforms Resolution 0.01 Hz...

  • Page 109: Table 58: Remote Programming

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 58: Remote Programming Remote Programming Hardware Interface GPIB (IEEE 488.2) RS-232 USB 2.0 (full speed, not high speed) Ethernet Software Interface SCPI (Standard) GT12000 series GT9000 series GT900 series GT7000 series...

  • Page 110: Performance Verification Procedures

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2 Performance Verification Procedures This section contains procedures and information for verifying that the 2500B is operating within its specifications. The specifications for the 2500B start on page 86. Compare the results of the performance verification tests to the appropriate sections in the Specifications chapter to verify that the 2500B is operating within specifications.

  • Page 111: Datasheets

    The Power Meter must have a video bandwidth capability > 100 kHz. Power Sensors, CW and Peak Power Giga-tronics 803XXA series CW Power Sensor and Peak Power Sensor or Equivalents, as appropriate for the frequency range of the 2500B under test.

  • Page 112: Frequency Range, Resolution, And Accuracy

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.4 Frequency Range, Resolution, and Accuracy In this test, the RF output of the 2500B is connected to the input of a spectrum analyzer, and the 2500B’s output frequency is tested at various points within its frequency range. The internal timebase of the spectrum analyzer is used as a reference for the 2500B to eliminate timebase errors.

  • Page 113: Spectral Purity

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 62: Datasheet 1: Frequency Range, Resolution, and Accuracy Datasheet 1: Frequency Range, Resolution, and Accuracy Test Frequency Measured Frequency 100 MHz 200 MHz 400 MHz 750 MHz 1.5 GHz 3 GHz...

  • Page 114: Figure 49: Spectral Purity Test Setup

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Figure 49: Spectral Purity Test Setup Table 63: Spectral Purity Spectral Purity Step Action Connect the equipment as shown in Figure 49; Connect the timebase output from the spectrum analyzer to the EXT REF IN connector on the rear of the 2500B.

  • Page 115: Table 63: Spectral Purity

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Spectral Purity Step Action Compare the test results with the specifications shown in Table 41 on page 90. End of Procedure 1 Reference spectrum analyzer phase noise performance specification to ensure that noise floor of analyzer does not limit analyzer range.

  • Page 116: Maximum Leveled Power

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.6 Maximum Leveled Power This test measures the maximum power levels at different frequencies where the 2500B maintains power leveling. NOTE: When measuring the flatness and accuracy of the 2500B, consideration must be given to the various measurement uncertainties in the test system.

  • Page 117: Table 66: Datasheet 3: Maximum Leveled Power

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification NOTE: In the datasheet below, test the 2500B only at the frequencies within the range of your specific model of 2500B. For frequencies not within your instrument’s range, enter “N/A” in the test results column(s) of the datasheet.

  • Page 118: Level Accuracy

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.7 Level Accuracy This test measures the accuracy of the power output of the 2500B at different frequencies. NOTE: When measuring the flatness and accuracy of the 2500B, consider the various measurement uncertainties in the test system.

  • Page 119: Table 68: Datasheet 4: Level Accuracy

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification NOTE: In the datasheet below, test the 2500B only at the frequencies within the range of your specific model of 2500B. For frequencies not within your instrument’s range, enter “N/A” in the test results column(s) of the datasheet.

  • Page 120: Step Attenuator Level Accuracy

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.8 Step Attenuator Level Accuracy This procedure tests the accuracy of the RF power output of the 2500B when the step attenuator option is included. NOTE: When measuring the flatness and accuracy of the 2500B, consider the various measurement uncertainties in the test system.
  • Page 121 Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 69: Step Attenuator Level Accuracy Step Attenuator Level Accuracy Step Action Connect the equipment as shown in Figure 51 on page 110. Allow the equipment to warm up for at least 30 minutes.

  • Page 122: Table 70: Datasheet 5: Step Attenuator Level Accuracy Test

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators NOTE: In the datasheet below, test the 2500B only at the frequencies within the range of your specific model of 2500B. For frequencies not within your instrument’s range, enter “N/A” in the test results column(s) of the datasheet.

  • Page 123: Amplitude Modulation Accuracy

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification 9.2.9 Amplitude Modulation Accuracy The following procedure tests the amplitude modulation accuracy at frequencies within each band. 9.2.9.1 Equipment and Materials Microwave spectrum analyzer Function generator Oscilloscope Digital voltmeter Cables and adapters for connecting the test setup...
  • Page 124 Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 71: Amplitude Modulation Accuracy Amplitude Modulation Accuracy Step Action Connect the equipment as shown in Figure 52 on page 113. Connect the function generator output to the EXT AM IN connector on the rear of the 2500B.

  • Page 125: Table 71: Amplitude Modulation Accuracy

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Amplitude Modulation Accuracy Step Action Set the AM Sensitivity of the UUT to 50 % and repeat steps 8 through 9 for each of the test frequen- cies in Datasheet 6, recording the AM depth for each measurement in the appropriate column.

  • Page 126: Amplitude Modulation Bandwidth

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.10 Amplitude Modulation Bandwidth This procedure tests the amplitude modulation bandwidth at frequencies within each band. 9.2.10.1 Equipment and Materials Microwave spectrum analyzer Oscilloscope Function generator Digital voltmeter Cables and adapters for connecting the test setup...

  • Page 127: Table 74: Datasheet 7: Amplitude Modulation Bandwidth

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Amplitude Modulation Bandwidth Step Action Vary the rate of the function generator within the specified rate range for the AM specification (see Table 51 on page 95). Identify the lowest sideband amplitude. Record the value in the second column of the datasheet.

  • Page 128: Frequency Modulation Accuracy - Low Rate

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.11 Frequency Modulation Accuracy - Low Rate This procedure tests the frequency modulation accuracy of the 2500B in low rate. 9.2.11.1 Equipment and Materials Microwave spectrum analyzer Function generator Digital voltmeter Cables and adapters for connecting the test setup...
  • Page 129 Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 75: Frequency Modulation Accuracy - Low Rate Frequency Modulation Accuracy - Low Rate Step Action Allow the equipment to warm up for at least 30 minutes. Connect the equipment as shown in Figure 53 on page 118.

  • Page 130: Table 76: Datasheet 8: Fm Accuracy - Low Rate

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 76: Datasheet 8: FM Accuracy - Low Rate Datasheet 8: FM Accuracy - Low Rate Test Results Frequency Rate Deviation Error Pass/Fail +/- 5 % (GHz) 10.0 Model type of 2500B series (for example, 2540B):...

  • Page 131: Frequency Modulation Accuracy - High Rate

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification 9.2.12 Frequency Modulation Accuracy - High Rate This procedure tests the frequency modulation accuracy of the 2500B in wide mode. 9.2.12.1 Equipment and Materials Microwave spectrum analyzer Function generator Cables and adapters for connecting the test setup...

  • Page 132: Table 78: Datasheet 9: Fm Accuracy - High Rate

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 78: Datasheet 9: FM Accuracy - High Rate Datasheet 9: FM Accuracy - High Rate Test Results Frequency Rate Deviation Error Pass/Fail +/- 5% (GHz) 10.0 Model type of 2500B series (for example, 2540B):...

  • Page 133: Pulse Modulation: Rise And Fall Time

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification 9.2.13 Pulse Modulation: Rise and Fall Time This test measures the rise and fall times of pulse modulation. 9.2.13.1 Equipment and Materials Oscilloscope, > 500 MHz bandwidth recommended Pulse generator Crystal (diode) detector, < 10 ns rise time, ≤ 3 pF output capacitance , frequency range equal or greater than the...
  • Page 134 Performance Verification Giga-tronics 2500B Series Microwave Signal Generators Table 79: Pulse Modulation: Rise and Fall Time Pulse Modulation: Rise and Fall Time Step Action Allow the equipment to warm up for at least 30 minutes. Connect the equipment as shown in Figure 54 on page 123.

  • Page 135: Table 80: Datasheet 10: Pulse Modulation Rise And Fall Time Test

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification NOTE: In the datasheet below, test the 2500B only at the frequencies within the range of your specific model of 2500B. For frequencies not within your instrument’s range, enter “N/A” in the test results column(s) of the datasheet.

  • Page 136: Pulse Modulation: Pulse Power Level Accuracy

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.14 Pulse Modulation: Pulse Power Level Accuracy 9.2.14.1 Equipment and Materials Pulse generator Universal power meter Peak power sensor, video bandwidth > 100 kHz Cables and adapters for connecting the test setup...

  • Page 137: Table 81: Pulse Modulation: Pulse Level Accuracy

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 81: Pulse Modulation: Pulse Level Accuracy Pulse Modulation: Pulse Level Accuracy Step Action Allow the equipment to warm up for at least 30 minutes. Connect the equipment as shown in Figure 55 on page 126.

  • Page 138: Pulse Modulation: Pulse On/Off Ratio

    Performance Verification Giga-tronics 2500B Series Microwave Signal Generators 9.2.15 Pulse Modulation: Pulse On/Off Ratio 9.2.15.1 Equipment and Materials Pulse generator Microwave spectrum analyzer Cables and adapters for connecting the test setup Datasheet 10 (Table 80 on page 125) Figure 56: Pulse Modulation On/Off Ratio Test Setup...

  • Page 139: Table 82: Pulse Modulation: On/Off Ratio

    Giga-tronics 2500B Series Microwave Signal Generators Performance Verification Table 82: Pulse Modulation: On/Off Ratio Pulse Modulation: On/Off Ratio Step Action Allow the equipment to warm up for at least 30 minutes. Connect the equipment as shown in Figure 56 on page 128.

  • Page 140: Appendixa Accessories And Options

    A 2500B without any options can generate a CW signal only, without any modulation. A.1 2500B Accessory & Option List The table below lists the currently available options and add-ons for the 2500B. Please check the Giga-tronics website (www.gigatronics.com) for the latest add-ons and options available.
  • Page 141 Giga-tronics 2500B Series Microwave Signal Generators Accessories and Options 2500B Add-on Accessories and Options Accessory/ Description Option Number Add minimum pulse width > 100 ns pulse Replace standard front panel with blank front panel (requires option #22) Add Rack Slide Kit...

  • Page 142: Appendixb Error Messages

    This appendix lists error and other messages that might be encountered during operation of the instrument. In some cases, encountered errors can be remedied by the user, while in other cases, you might need to contact Giga-tronics support. This appendix consists of the following sections: “Start-Up Error Messages”...

  • Page 143: Table 84: Start-Up Error Messages

    Giga-tronics 2500B Series Microwave Signal Generators Error Messages Table 84: Start-up Error Messages Start-up Error Messages Error Number Error Description TIMEBASE_SET_ERROR NVRAM_BATT_FAIL CPU_FPGA_LOAD_FAIL SYN_FPGA_LOAD_FAIL ALC_SP_FPGA_LOAD_FAIL ALC_PM_FPGA_LOAD_FAIL RTOS_UTIL_ERROR SYN_DSP_BOOT_LOAD_FAIL ALC_DSP_BOOT_LOAD_FAIL SYN_DSP_LOAD_FAIL ALC_DSP_LOAD_FAIL ALC_ZERO_FAIL ALC_COMM_ERR ALC_MEM_TEST_FAIL ALC_ANALOG_TEST_FAIL YIG_CAL_ERR SYN_CAL_ERR FPGA_CHECK_ERR A1A2_CAL_ERR Bit position not currently used...

  • Page 144: Nv Ram Messages

    Error Messages Giga-tronics 2500B Series Microwave Signal Generators B.2 NV RAM Messages The instrument uses non-volatile memory (NVRAM) to store user settings and configurations. In certain instances, user messages might be displayed that are related to NVRAM. The following paragraphs explain these instances.

  • Page 145: Remote Error Messages

    Giga-tronics 2500B Series Microwave Signal Generators Error Messages When a checksum error occurs, you can take either of the following actions: Choose the interactive softkey that is adjacent to “Reset Memory.” In this case, NVRAM is reset. Choose the interactive softkey that is adjacent to “Ignore.” In this case, NVRAM is not reset, but the checksum is recalculated.
  • Page 146 Error Messages Giga-tronics 2500B Series Microwave Signal Generators 2500B Remote Error Messages Error Number Error Message System out of list memory. Invalid list point parameter. List does not exist. Invalid list trigger repeat type. Single Step, Single Sweep, and Continuous are supported.
  • Page 147 Giga-tronics 2500B Series Microwave Signal Generators Error Messages 2500B Remote Error Messages Error Number Error Message Invalid AM source. INTernal or EXTernal is supported. Invalid AM scan mode. 0 - Deactivate AM, 1 - Activate external scan modulation, 2 - Activate...
  • Page 148 Error Messages Giga-tronics 2500B Series Microwave Signal Generators 2500B Remote Error Messages Error Number Error Message Incorrect password for setting minimum list step time. Unable to update parameter block data. List step time is out of range. FM deviation is out of range.

This manual is also suitable for:

2550b2508b2520b2526b2540b

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