Page 1 Tel: +852 2405 5500, FAX: +852 2416 4335 http://www.racalinstruments.com PUBLICATION DATE: July 25,2000 Copyright 2000 by Racal Instruments, Inc. Printed in the United States of America. All rights reserved. This book or parts thereof may not be reproduced in any form without written permission of the publisher.
Page 2 Authorization is required from Racal Instruments before you send us your product for service or calibration. Call your nearest Racal Instruments support facility. A list is located on the last page of this manual. If you are unsure where to call, contact Racal Instruments, Inc. Customer Support Department in Irvine, California, USA at...
Page 3 FOR YOUR SAFETY Before undertaking any troubleshooting, maintenance or exploratory procedure, read carefully the WARNINGS and CAUTION notices. This equipment contains voltage hazardous to human life and safety, and is capable of inflicting personal injury. If this instrument is to be powered from the AC line (mains) through an autotransformer, ensure the common connector is connected to the neutral (earth pole) of the power supply.
Page 4: Table Of Contents
Programming The Model 3152 ........
Page 5 Using The Instrument Overview ............Output Termination .
Page 6 SCPI Command Reference What’s In This Chapter ..........Introduction To SCPI Language .
Page 7 Trig, Gate and Burst Characteristics ....... . PLL Characteristics ..........5-10 Adjustments .
Page 8 Amplitude and Offset Ranges ....... . . VXIbus Model 3152 SCPI Commands List Summary ....
Page 9: Front Panel
O U T P U T S Y N C O U T T T L T R IG /PLL IN 30 V M A X C LO C K IN E C L P M IN 30 V M A X 3152 Front Panel...
Page 10: What's In This Chapter
3152 Waveform Synthesizer and an overall functional description Chapter of the instrument. It lists and describes various options available for this model. It also describes the Model 3152 front panel connectors and indicators. This manual provides a complete description of all features and options available with the Model 3152;...
Page 11: Options
The Model 3152 is fully programmable using SCPI commands and syntax. There are two ways to program the Model 3152, the first being low level programming of each individual parameter. The second alternative is to use the VXIplug&play soft front panel for high level programming.
Page 12: Manual Changes
Synthesizer, w/512K RAM, 100PPM The 64K RAM option designates the memory size supplied with the Model 3152. The standard memory size is 64K (65536 words). With the standard memory size, 64536 point waveforms can be programmed because 1K is allocated for standard waveforms.
Page 13: Specifications
The description is divided into logical groups: input and Description output connectors, operating modes, output type, output state, synchronization, filters and front panel indicators. The Model 3152 has 5 BNC connectors on its front panel: main Input and Output output, SYNC output, phase modulation input, reference clock Connectors output and the trigger input.
Page 14: Trigger Input
In gated mode, the trigger input is level sensitive, i.e., the Model 3152 is gated when the level is high and idle when the level is low. Level sensitivity may be programmed for the trigger input.
Page 15: Gated Mode
Loading data to arbitrary waveform memory can be a time-consuming task, especially if the complete 512K is loaded in one shot. The Model 3152 utilizes the VXIbus shared memory concept that speeds data transfer from and to the host computer.
Page 16: Segment 2 - Sine Waveform
Figure 1-1 Segment 1 - Sin(x)/x Waveform Figure 1-2 Segment 2 - Sine Waveform Getting Started 1-7...
Page 17: Output State
BNC connector by a mechanical switch under program control (relay). This feature is useful for connecting the Model 3152 main output, along with other instruments, to an analog bus. For safety reasons, after power on, the main output is always off.
Page 18: Backplane Synchronization
500 Hz to 10 MHz. External frequency query returns four digits with a decimal point and suffix multiplier. When the Model 3152 is placed in PLL mode, there are two ways to Phase Modulation control the phase offset. The first option is to modify the phase offset setting using SCPI commands.
Page 19: Programming The Model 3152
Model 3152 stops communication. The ACCESS LED (Amber) illuminates each time a command has been received by the Model 3152. This light remains on during shared memory data transfer. The PLL ON LED is off during normal operation. In PLL mode, the PLL ON illuminates when a valid signal is available at the trigger input and lock frequency is available at the main output connector.
Page 20: Installation Overview
Configuring The Instrument This chapter contains information and instructions necessary to Installation prepare the Model 3152 for operation. Details are provided for initial Overview inspection, grounding safety requirements, repacking instructions for storage or shipment, logical address selection and installation information.
Page 21: Performance Checks
Do not make an attempt to float the output from ground as it WARNING may damage the Model 3152 and your equipment. Long Term Storage or If the instrument is to be stored for a long period of time or shipped immediately, proceed as directed below.
Page 22: Preparation For Use
(switch S1). Figure 2-1 shows the location of the logical address switch. The switches are marked with numbers 1 to 8. The Model 3152 uses binary values (2 to 2 ) to set the logical address using the active low address switch. A switch is active when its arm is placed in the ON position.
Page 23: Set The Logical Address
O FF (LO G IC 0 ) M S B (LO G IC 1 ) L S B S ID E V IE W O F S W ITC H S 1 Figure 2-1 Set The Logical Address Configuring The Instrument 2-4...
Page 24: Installation
Installation The instrument can be installed in any slot except slot 0 in a VXIbus mainframe. When inserting the instrument into the mainframe, it should be gently rocked back and forth to seat the connectors into the backplane receptacle. The ejectors will be at right angles to the front panel when the instrument is properly seated into the backplane.
Page 25 This page was intentionally left blank Configuring The Instrument 2-6...
Page 26: Output Termination
Appendix A to determine the level of protection associated with each input or output connector. Power On/Reset At Power On or as a result of a software reset, the Model 3152 defaults to the conditions shown in Table 3-1. A complete list of all Defaults parameters and their default values is given in Chapter 4.
Page 27: Default Conditions After Power On, Reset Or *Rst
The following example programs the Model 3152 to turn on the main output, generate a square waveform, program the frequency to 2 MHz, program the amplitude to 5 V and offset to 2.5 V. /* Reset the Model 3152 to its default condition as listed in Table 3- 1.*/ :RESet;...
Page 28: Amplitude And Offset Ranges
Table 3-2 Amplitude and Offset Ranges Amplitude Window Maximum Offset $1.6 V ±8 V 0 to ±7.19 V $160 mV ±800 mV 0 to 719 mV $10 mV ±80 mV 0 to 75 mV To calculate the maximum offset available for a particular amplitude setting, use the following inequality: + * V * # 8 V * 800 mV * 80 mV...
Page 29 Alternatively, if just the first parameters need to be changed, omit the commas. The other parameters will be set to the power-up default values: APPL:SQU 4e6,2 Queries can also be made on all parameters associated with a standard function using the APPL: <function_shape>? query. For example, if the synthesizer was programmed using the above APPLy:SQU command, query the square wave parameters using the following query:...
Page 30 The command: APPLy:RAMP {<frequency>,<amplitude>,<offset>, <delay>, <rise_time>,<fall_time>} programs the synthesizer to output a ramp waveform with frequency, amplitude, offset, delay, rise time, and fall time parameters. The default settings for these functions are: 1 MHz, 5 Vp-p, 0 V, 0%, 10% and 10%. The command: APPLy:SINC {<frequency>,<amplitude>,<offset>, <number_cycles>}...
Page 31: Output Configuration Commands
2 MHz, programs amplitude to 5 V and offset to 2.5 V. It also changes the square wave duty cycle parameter to 25%. /* Reset the Model 3152 to its default condition as listed in Table 3- 1.*/ :RESet;...
Page 32: Selecting An Output Function Type
Selecting an Output Use the following command to select the output function type: Function Type FUNCtion:MODE {FIXed | USER | SEQuence} When "FIXed" is selected, the synthesizer outputs the standard waveform currently selected by the FUNC:SHAP command. When "USER" is selected, the synthesizer outputs the arbitrary waveform currently selected by the TRAC:SEL command.
Page 33: Selecting The Sample Clock Source
ECLTRG0 selects a sample clock that is available on the backplane. Note that ECLTRG0 is always the active sample clock source when the Model 3152 is set to operate in phase synchronization mode. The query: FREQuency:RASTer:SOURce? queries the sample clock source setting and returns EXT, INT or ECLT.
Page 34: Selecting The Filter Type
The command: VOLTage:OFFSet <offset> sets the offset for the currently active function. The default offset is 0 V. The query: VOLTage:OFFSet? queries the output offset for the currently selected function and returns a value in volts. Selecting the Filter Before selecting the filter type, use the following command to activate the filter: Type OUTPut:FILTer { OFF | ON}...
Page 35: Activating The Backplane Ecltrg And Ttltrg
Activating the The Model 3152 can transmit and receive signals on the VXIbus ECLTRG and TTLTRG lines. Backplane ECLTRG and TTLTRG Use the following command to activate one of two backplane ECLTRG lines: OUTPut:ECLTrg<n> { OFF | ON} <n> designates the activated trigger line; 0 and 1 are available. ON enables the selected trigger line.
Page 36: Assigning The Validating Source For Ttltrg
In the OFF position, the output connector is disconnected from the output amplifier by means of a mechanical relay. Ensure that voltage is not applied to the main output connector when the Model 3152 output state is programmed to ON. The query: OUTPut? queries the state of the main output and returns "0"...
Page 37: Enabling The Sync Output
Enabling the SYNC For safety reasons, the SYNC output default setting is OFF. Disable or enable the SYNC output using the following command: Output OUTPut:SYNC {OFF | ON} When the SYNC output state is programmed to ON, the SYNC output connector generates signals which are triggered by signals selected using the SYNC:SOUR command.
Page 38: Selecting The Sync Position
HCLock Generates a trigger signal at intervals equal to half of the period of the sample clock. This option useful synchronizing two-point waveforms on an oscilloscope (sine and square waveforms above 10 MHz). The query: OUTPut:SYNC:SOURce? queries the validating signal source for the SYNC output and returns BIT, LCOM, SSYN or HCL.
Page 39 For TRIangle and SINC: Freq # 200kHz Points = 500 Freq > 200kHz Points = 100MHz Freq The equations used for generating EXPonential, GAUSian and SINC functions are as follows: For Positive EXPonential: 7.7t F(m) ' & &1] Where A = Amplitude m = Current point (I..N) N = Total number of points t = Time constant set by user...
Page 40 The command: PULSe:DELay <value> sets the pulse delay in percent of the pulse period. For example, if the pulse period is 100 ms, 10% will delay the first transition of the pulse by 10 ms. Delay is measured from trigger to the first turning point.
Page 41: Selecting An Operating Mode
INITitiate:CONTinuous? queries the instrument operating mode parameter and returns "0" (OFF) or "1" (ON). The Model 3152 can be set to operate in Gated mode only after the Gated Mode INIT:CONT OFF command has been received. The output remains at a certain DC level as long as the TRIG IN signal from the front panel remains inactive.
Page 42: Gated Mode
A TTL signal is used to stimulate the TRIG input. The generator is sensitive to either the rising edge or the falling edge. Each time a transition at the trigger input occurs, the Model 3152 generates a number of output cycles that have been programmed in the burst count parameter.
Page 43: Burst Mode
TRIGger:SOURce:ADVance {EXTernal | INTernal | TTLTrg<n>} EXT is the default trigger source for the Model 3152. Select the TTLT<n> option with <n> ranging from 0 to 7 to use one of the TTLTRG lines available on the backplane. Select INT to use the internal trigger generator.
Page 44: Selecting The Trigger Slope
The trigger slope command selects the sensitive edge of the trigger Trigger Slope signal that is applied to the TRIG IN connector. The Model 3152 can be made sensitive to either positive or negative transitions. Use the following command to select the edge sensitivity for the trigger...
Page 45: Using The Soft Trigger
Using the Soft There are a number of commands that are available to trigger the Model 3152. The soft trigger command is one of them. To use the Trigger soft trigger command, place the instrument in the TRIG:SOUR EXT mode. Soft trigger is ignored in the internal or TTLTrg<n> modes.
Page 46: Memory Management Commands
Arbitrary memory can be divided into smaller segments; up to 4096 different arbitrary waveforms can be generated with the Model Commands 3152. The length of each segment is left totally to the user’s discretion. To partition the arbitrary waveform memory, use the following command: TRACe:DEFine <segment_number>,<length>...
Page 47 Next, make segment 8 the active segment. The active segment must be selected because as waveforms are loaded, the Model 3152 must be notified as to where to place the data it receives. Select the active segment using the following command: TRACe:SELect 8 The next step is to transfer data to the active segment.
Page 48: Definite Length Arbitrary Block Data Format
Figure 3-1 Definite Length Arbitrary Block Data Format 6-bits of data are sent to the Model 3152 although only 12 bits are required to generate the waveform. The order of bytes and bits and their values are shown in Figure 3-2.
Page 49: Reversing Byte Order
1002 points and generate an error message. Reversing Byte Order Binary data is sent to the Model 3152 in byte-high byte-low order. This order can be reversed using the following command: FORMat:BORDer {NORMal | SWAPped} The default is NORM.
Page 50 READ or WRITE. The command:. SMEMory:STATe {OFF | ON} places the Model 3152 in the shared memory state when ON is selected. After this, the instrument cannot accept normal commands. Data must be sent to the synthesizer using shared memory access.
Page 51: Sequence
Generating Sequenced Waveforms Sequenced waveforms are made of a number of arbitrary What Are Sequenced waveforms which can be linked and repeated in various manners. Waveforms? Sequenced waveforms are generated from waveforms stored in a library of memory segments. Before using a sequence of waveforms, load arbitrary memory with the required waveforms.
Page 52: Sine Waveform Loaded Into Segment
Figure 3-4 Sine Waveform Loaded Into Segment 2 Figure 3-5 Pulse Waveform Loaded Into Segment 3 Using The Instrument 3-27...
Page 53: Sequence Commands
It is possible to have only one step in a sequence but the output will look like a continuous waveform. If only one step is specified and the Model 3152 is placed in Triggered mode, the output will behave as it would in Burst mode where the repeat number replaces the burst count parameter.
Page 54: Triggered Sequence Advance
Triggered Sequence Advance is a special case sequenced mode. Triggered Sequence In Triggered Sequence Advance mode, the Model 3152 idles Advance between steps until a valid trigger signal is sensed. The trigger source can be selected from a number of options:...
Page 55: Triggered Sequence Advance Commands
Figure 3-7 Sequenced Waveforms - Triggered Advance Mode Triggered Sequence Placing the Model 3152 in Triggered Sequence Advance mode is done in Triggered mode only. First, prepare the sequence of Advance Commands waveforms using the commands that were explained before.
Page 56 Model 3152 modules as slaves (SLAVe) and program their phase offset in relation to the master. As an example, program the second and third Model 3152 with 120 and 240 degree offsets, respectively. Use the following commands on the second Model 3152:...
Page 57: Front-Panel Phase Synchronization
In query: PHASe[1]:SOUR? queries the phase lock source and returns MAST or SLAV. The Model 3152 can phase lock to an external reference which is Front-Panel Phase applied to the trigger input. The locking process is done Synchronization automatically by the generator.
Page 58: Pll Commands
0.01E and can be used in conjunction with the coarse phase offset adjustment at any phase offset setting point. In PLL mode, the Model 3152 can be used as a slave only. Use the PLL Commands following commands to program the Model 3152 to lock to an external reference.
Page 59: Using The Frequency Counter
PHASe2:LOCK ON If no valid reference signal is applied to the trigger input, the PLL ON LED remains off. If you feel that the 3152 should lock and it does not, do the following: 1. Check that trigger level is adjusted correctly. You may change trigger level settings using the TRIG:LEV command.
Page 60: Amplitude Modulation Commands
The PM IN is sensitive to voltage levels. Applying 1 V to this input generates a phase offset of 20E. Likewise, applying -1 V to this input generates a phase offset of -20E. You may apply 20 V to this input and generate a phase offset of 400E.
Page 61: System-Related Commands
The first field is the manufacturer's name, the second field is the model number, the third field is not used (always "0") and the fourth field is the firmware version number. The command returns "Racal Instruments,3152,0,1.0". The commands: RESet *RST reset the generator to its default state.
Page 62 The query: *OPT? queries the waveform memory length installed in the 3152. The response is “0” for 64K and “1" for 256K or 512K. Using The Instrument 3-37...
Page 63 This page was intentionally left blank Using The Instrument 3-38...
Page 64: Introduction To Scpi Language
(SCPI) convention rules and syntax are explained in detail. Table 4-1 lists all SCPI commands used for programming the Model 3152. The command summary for each SCPI model is also included in this chapter. This chapter teaches you how to use SCPI commands to control functions, modes, waveforms and other aspects of the instrument.
Page 65: Command Format
Part of the OUTPut subsystem is shown below to illustrate the tree system: OUTPut :FILTer [:LPASs] :FREQuency {20MHz|25MHz|50MHz} [:STATe] OFF|ON [:STATe] OFF|ON OUTPut is the root keyword of the command; FILTer and STATe are second level keywords. FREQuency and STATe are third level keywords.
Page 66: The Min And Max Parameters
A semicolon ( ; ) is used to separate commands within the same subsystem, and can also minimize typing. For example, sending the following command string: TRIG:SOUR:ADV INT;BURS ON;INT:RATE 5e-3 is the same as sending the following three commands: TRIG:SOUR:ADV INT TRIG:BURS ON TRIG:INT:RATE 5e-3 Use the colon and semicolon to link commands from different...
Page 67: Ieee-Std-488.2 Common Commands
IEEE-STD-488.2 The IEEE-STD-488.2 standard defines a set of common commands that perform functions like reset, trigger and status Common operations. Common commands begin with an asterisk ( * ), are Commands four to five characters in length, and may include one or more parameters.
Page 68: Arbitrary Block Parameters
Arbitrary block parameters are used for loading waveforms into the Arbitrary Block synthesizer's memory. Depending on which option is installed, the Parameters Model 3152 can accept binary blocks up to 1046576 bytes. The following command uses an arbitrary block parameter that is loaded as binary data: TRAC:DATA#564000<binary_block>...
Page 69: Vxibus Model 3152 Scpi Commands List Summary
Table 4-1 VXIbus Model 3152 SCPI Commands List Summary Keyword Parameter Form (Default in Bold) SCPI 1993.0 Notes :FORMat :BORDer NORMal | SWAPped Confirmed :OUTPut Confirmed [:STATe] OFF | ON Confirmed :FILTer Confirmed [:LPASs] Confirmed :FREQuency 20MHz | 25MHz | 50MHz...
Page 70 Keyword Parameter Form (Default in Bold) SCPI 1993.0 Notes :RAMP Not Confirmed :DELay (10;0;99.9) Not Confirmed :TRANsition Not Confirmed [:LEADing] (10;0;99.9) Not Confirmed :TRAiling (10;0;99.9) Not Confirmed :SINC Not Confirmed :NCYCle (10;4;100) Not Confirmed :GAUSsian Not Confirmed :EXPonent (10;1;200) Not Confirmed :EXPonential Not Confirmed :EXPonent...
Page 71: Output Configuration Command Summary
Common Commands Parameter Form (Default in Bold) IEEE-STD-488.2 :SMEMory Not Confirmed :MODE READ | WRITe Not Confirmed [:STATe] OFF | ON Not Confirmed :TEST Confirmed [:ALL]? Confirmed *CLS Confirmed *ESE (0;0;255) Confirmed *OPC Confirmed *RST Confirmed *SRE (0;0;255) Confirmed *TRG Confirmed *ESE? Confirmed...
Page 72 FREQuency:RASTer:SOURce? FREQuency:EXTernal? VOLTage {<amplitude>| MINimum | MAXimum} (10.0E-3,16.0,5.00) VOLTage? VOLTage:OFFSet <offset> (-7.19,7.19,0) VOLTage:OFFSet? OUTPut: FILTer:FREQuency {20MHz | 25MHz | 50MHz} 20MHz FILTer:FREQuency? FILTer {OFF | ON} FILTer? [STATe] {OFF | ON} [STATe] SOURce? SYNC:SOURce {BIT | LCOMplete | SSYNc | HCLock} 1256K SYNC:POSition <value>...
Page 73: Standard Waveform Command Summary
The Standard Waveform Commands control the various parameters Standard Waveform of the standard output functions. Optional modes are omitted from Command Summary these commands. Factory defaults after *RST are shown in bold typeface. Parameter low and high limits are given where applicable. The Standard Waveforms parameters could be used for the APPLy command.
Page 74: Arbitrary Waveform, Sequence, And Shared Memory Command Summary
Sequence commands control which Shared Memory segments are linked and the number of times each segment is repeated. The shared memory commands place the Model 3152 in Command Summary a special data transfer mode where the Model 3152's message- based interface is bypassed and data is loaded directly from the VXIbus.
Page 75: Trigger Command Summary
The Trigger commands control the trigger modes of the Model Trigger Command 3152. The Model 3152 can be placed in Triggered, Gated or Burst Summary mode. Trigger source is selectable from an external source, internal trigger generator, backplane TTLTrg 0-7, and software trigger.
Page 76: System-Related Command Summary
The relationship between these parameters is show in Appendix System-Related The system-related commands are not related directly to waveform generation but are an important part of operating the Model 3152. Command These commands can reset or test the instrument, or query the Summary instrument for system information.
Page 77 However, both the system bus and the controller handshake are in a temporary hold-off state while the controller is waiting to read the *OPC? query response. *OPT? - Returns the value “0” for Model 3152 with 64K memory. Returns “1” for Model 3152 with 256K memory or with 512K memory.
Page 78: Self-Test
*WAI - Wait for all pending operations to complete before executing any addditional commands over the interface. The SCPI Status The Model 3152 uses the Status Byte register group and the Standard Event register group to record various instrument Registers conditions.
Page 79 An Event Register defines which bits in the corresponding event register are logically ORed together to form a single summary bit. The user can read from and write to an Enable Register. Querying an Enable Register will not clear it. The *CLS command does not clear Enable Registers but it does clear bits in the event registers.
Page 80: Scpi Status Registers
Figure 4-1 SCPI Status Registers SCPI Command Reference 4-17...
Page 81: The Status Byte Register (Stb)
The Status Byte summary register contains conditions from the The Status Byte Register other registers. Query data waiting in the synthesizer's output buffer (STB) is immediately reported through the Message Available bit (bit 4). Bits in the summary register are not latched. Clearing an event register will clear the corresponding bits in the Status Byte summary register.
Page 82: Service Request Enable Register (Sre)
Bit 1 - Request Control. This bit operation is disabled on the Model 3152. Bit 2 - Query Error. This bit indicates that an attempt is being made to read data from the output queue when no output is either present or pending.
Page 83: Standard Event Status Enable Register (Ese)
Bit 3 - Device Dependent Error. This bit is set when an error in a device function occurs. For example, the following command will cause a DDE error: VOLTage 7.25;:VOLTage:OFFSet 4.1 Both of the above parameters are legal and within the specified limits, however, the synthesizer is unable to generate such an amplitude and offset combination.
Page 84: Error Messages
In general, whenever the Model 3152 receives an invalid SCPI Error Messages command, it automatically generates an error. Errors are stored in a special error queue and may be retrieved from this buffer one at a time. Errors are retrieved in first-in-first-out (FIFO) order. The first error returned is the first error that was stored.
Page 85: Device-Specific Commands
The output buffer is cleared when power is shut off or after a device clear has been executed. Device-Specific The Model 3152 conforms to the 1993.0 version of the SCPI standard. Some of the commands used are not included in the Commands 1993.0 version.
Page 86: Disassembly Instructions
What’s in This performance tests, and the information necessary to adjust and Chapter troubleshoot the Model 3152 Waveform Synthesizer. The procedures described in this section are for use only by qualified service personnel. Many of the steps covered in this...
Page 87: Special Handling Of Static Sensitive Devices
Once the device is installed on the PC board, the device is adequately protected and normal handling may resume. The Model 3152 should be cleaned as often as operating conditions Cleaning require. To clean the instrument, use the following procedure: Thoroughly clean the inside and outside of the instrument.
Page 88: Environmental Conditions
Most equipment is subject to a small amount of drift when it is first Warm-Up Period turned on. To ensure accuracy, turn on the power to the Model 3152 and allow it to warm-up for at least 30 minutes before beginning the performance test procedure.
Page 89: Recommended Test Equipment
20dB feedthrough attenuator 50S, 1% “T” BNC Connector 50S, 1% Use the following procedures to check the Model 3152 against the Performance specifications. A complete set of specifications is listed in Appendix Check Procedures A. The following paragraphs show how to set up the instrument for the test, what the specifications for the tested function are, and what acceptable limits for the test are.
Page 90: Amplitude Accuracy
3. Connect the Model 3152 output to the counter’s input. Change the frequency setting as required for the test and verify the reading on the counter display as follows: 3152 SETTING COUNTER READING 10.00000 Hz 9.999000 Hz - 10.00100 Hz 100.0000 Hz 99.99000 Hz - 100.0100 Hz...
Page 91: Squarewave Characteristics
2. Set the DMM to DCV measurements 3. Connect the Model 3152 output to the DMM input. Terminate the output with a 50S feedthrough termination. Set the Model 3152 offset and verify the DMM reading as follows: OFFS SETTING DMM READING ±5.000 V...
Page 92: Sine Characteristics
2. Connect the Model 3152 output to the oscilloscope input. Use the 20 dB attenuator and set the oscilloscope input impedance to 50S. 3. Set the oscilloscope and verify that the rise and fall times are less than 6 ns. Verify that overshoot and ringing are less than 5% of amplitude.
Page 93: Sine Flatness
Revised 7/25/00 corresponds to 0 dB. Connect the Model 3152 output to spectrum analyzer input through a 20dB feedthrough attenuator. Set the Model 3152 FREQ setting and verify the harmonic distortions levels as follows: FREQ SETTING HARMONICS LEVEL 5.000 MHz <50 dB...
Page 94 Gated - External signal at the TRIG IN connector enables the Model 3152 output. The last cycle of the output waveform is always completed. Burst - Each transition at the front panel TRIG IN connector stimulates the Model 3152 to generate a burst of pre-selected number of cycles.
Page 95: Pll Characteristics
Connect function generator output to the input of the 50S “T” Connector. b. Connect one end of the 50S “T” Connector to the 3152 TRIG IN and the other end to the counter Channel A input. c. Connect 3152 OUT to the counter Channel B input.
Page 96 100.0 KHz 100.0 KHz 0E ±5.72E 10.00 KHz 10.00 KHz 0E ±5E 5. Change the Model 3152 PHAS2:ADJ setting to 180E. Change 3152 and Pulse/Function generator frequency and verify counter phase readings as shown below. 3152 FREQ. PULSE GENERATOR SETTING FREQ.
Page 97: Adjustments
Warm-Up Period turned on. To ensure long term calibration accuracy, turn on the power to the Model 3152 and allow it to warm-up for at least 30 minutes before beginning the adjustment procedure. Recommended test equipment for calibration is listed at the...
Page 98: Pulse Response Adjustment
4. Set the oscilloscope vertical gain and time base, and adjust R36 and C19 for the best pulse response. 5. Change the Model 3152 frequency setting to 10.00 KHz. 6. Set the oscilloscope vertical gain and time base, and adjust R22 for best pulse flatness.
Page 99: Amplitude Adjustment
:OUTP ON :FREQ 1E3 :VOLT 16 2. Connect the Model 3152 output to the DMM input through the 50S feedthrough termination. Set the DMM to AC Volt measurements and 2 V range. 3. Adjust R44 until the DMM reading is 5.657 V ±20 mV.
Page 100: Vco Adjustment
Equipment: DMM VCO Adjustment 1. Configure the Model 3152 as follows: Function: Sinewave Output: Remote Commands: :RES 2. Connect the DMM “V” input to U515 pin 1 and the DMM “Common” input to case ground. Set the DMM to DCV measurements.
Page 101: Troubleshooting
Power-Up Tests Upon power-up, the Model 3152 performs a set of tests. If the instrument locks up after power on, proceed with the troubleshooting procedure given in the following paragraphs Self-Test An advanced feature of the Model 3152 is its self-test capability.
Page 102: Main Board Circuit Checkout
Service Technician to the area were the source of the trouble is located. Main Board The Model 3152 is made of two boards. The large board (Part Number 7100-2370) is the main board. There is a smaller board Circuit Checkout mounted on the main board with three connectors (Part Number 7100-2360).
Page 103: Output Amplifier And Amplitude Control Checkout
Negative going 60 µs width pulses Output Amplifier and Problems with the output amplifier and amplitude control circuits can be detected if the Model 3152 accepts word serial commands Amplitude Control and responds correctly to word serial queries, but fails to output the correct waveform with correct amplitude and offset levels.
Page 104 Change amplitude setting to 1.61V and offset setting to 7V U8, pin 1 Approximately -320 mV U8, pin 7 Approximately -2 V Maintenance and Performance Checks 5-19...
Page 105: Clock Synthesizer Checkout
If there is a problem with the clock synthesizer circuit, proceed with the checkout procedure given in Table 5-3. Before you start with the following procedure, reset the 3152 to the factory default using the *RST command and change frequency setting to 1 MHz.
Page 106: Sequence Generator Checkout
If there is a problem with the sequence generator circuits, proceed with the checkout procedure given in Table 5-4. Before starting the following procedure, reset the Model 3152 to the factory default using the *RST command. Configure the Model 3152 to sequenced output mode and load three different waveforms - 100 points long, to segments 1, 2, and 3, respectively.
Page 107: Pll Checkout
The next checkout is done on the Model 3152 configured to operate in burst mode with 5 bursts. Use the following command to configure the Model 3152: Remote Commands: :FUNC:MODE USER :TRAC:SEL 1 :INIT:CONT OFF :TRIG:BURS: ON :TRIG:COUN 5 :OUTP ON Connect an external trigger source to the front panel TRIG IN connector.
Page 108: Engine Board Circuit Checkout
Circuit Checkout before continuing with the following checks. The following circuit checks are performed on the engine board only. The “engine board” is the analog heart of the Mode 3152. It Engine Board contains the waveform memory circuit, high frequency clock drives, and circuitry that drives the D/A converter.
Page 109 Change the Model 3152 setting to triggered. Use an external pulse generator to apply a TTL level, 200 KHz signal to the TRIG IN connector. Proceed with the checks given in Table 5-7b. Table 5-7b Engine Board Checkout Procedure - #2...
Page 110: Specifications
Specifications VXIbus General Information Module Form Single slot VXIbus C-size module Connectors P1, P2 Protocol A16/A24/D16 Slave, Message-Based VXIbus Revision SCPI Revision 1993.0 Logical Address Settings 1 - 255, configured via DIP switches Interrupt Level Settings 1 - 7, configured dynamically (no DIP switch) Shared Memory A24, D16, 64K points.
Page 111 Triggering Characteristics Trigger Input Impedance 1 k6, ±5% Level ±10 V Resolution 10 mV Sensitivity 100 mV rms Accuracy ±(5% of level + 150 mV) Maximum Input Voltage 30 V rms Minimum Pulse Width 20 ns Slope Positive or negative going edges, programmable Modes Normal Continuous waveform is generated...
Page 112 Backplane Multi-Module Synchronization Multiple Model 3152 modules may be synchronized. A master Model 3152 module provides the necessary signals to slave Model 3152 modules to achieve synchronization. The signals required are sample clock (distributed on ECLTRG0) and another signal (distributed on ECLTRG1). Phase offset is settable (in degrees) for each slave module with respect to the master module output.
Page 113 VXIbus B.8.6.4, Rev 1.4 Conducted Emissions VXIbus B.8.7.3, Rev 1.4 Conducted Susceptibility VXIbus B.8.7.4, Rev 1.4 Mechanical Dimensions Per Racal Instruments VXIbus corporate package drawings Weight 3 lbs. 8 oz. (1.6 kg) Airflow (for 10 C rise) 3.7 I/S Specifications A-4...
Page 114 Pressure (for 10 C rise) 0.5 mm H 0 Environmental Operating Temperature 0 C - 55 C Storage Temperature -40 C - +70 C Humidity (non-condensing) 11 C - 30 C 95% +5% 31 C - 40 C 75% +5% 41 C - 50 C 45% +5% Altitude...
Page 115: Standard Waveforms
Range 0 to ±7.190 V within ±8 V window 0 to ±719.0 mV within ±800 mV window 0 to ±71.90 mV within ±80 mV window Resolution 4 digits Accuracy ±(1% +1% of amplitude +20 mV) ±8 V window ±(1% +1% of amplitude +2 mV) ±800 mV window ±(1% +1% of amplitude +200 µV) ±80mV window Filters 50 MHz 7-pole elliptic...
Page 116 Triangle Frequency Range 100 µHz to 1 MHz, usable to 10 MHz Adjustable Parameters Start Phase 0 to 360° Power 1 to 9 Square Frequency Range 100 µHz to 50 MHz Adjustable Parameters Duty Cycle 1% to 50% Pulse/Ramp Frequency Range 100 µHz to 1 MHz Adjustable Parameters Delay...
Page 117: Arbitrary Waveforms
Range 1% to 100% of amplitude Arbitrary Waveforms Waveform Memory 64k (256K or 512K) optional) points Memory Segmentation Number of Segments 1 to 4096 Min Segment Size 10 point Vertical Resolution 12 bits (4096 points) Sampling Clock Source Internal synthesizer, external clock, ECLTRG0 Range Internal 100 mHz to 100 MHz...
Page 118 Accuracy Same as frequency standard Stability Same as frequency standard PLL Characteristics Operation Automatically locks to external signal PLL Input Characteristics Same as TRIG IN External Lock Frequency Range Standard Waveforms 500 Hz to 200 kHz; frequency setting 500 Hz to 200 KHz;...
Page 119 Max. Lock Frequency 10MHz 500Hz Waveform Samples 200,000 Coarse Phase Offset Control Range ±180% Resolution Std. Waveforms 0.72%, frequency setting from 500 Hz to 200 kHz; 360% x frequency (in MHz) / 100, frequency setting from 200 KHz to 10 MHz Arbitrary Waveforms 360% / waveform samples Accuracy...
Page 120 PM Input Bandwidth 10KHz 1KHz 100MHz _______ Ext. Freq. 100Hz 1000 10,000 100,000 PM Input Impedance 100 K6, ±5% Sensitivity 20%/V, typical Accuracy ±30% Specifications A-11...
Page 121 This page was intentionally left blank Specifications A-12...
Page 122 Racal Instruments REPAIR AND CALIBRATION REQUEST FORM To allow us to better understand your repair requests, we suggest you use the following outline when calling and include a copy with your instrument to be sent to the Racal Repair Facility.
Page 123 Support Offices Racal Instruments, Inc. 4 Goodyear Street Irvine, CA 92718-2002 Phone: 1-714-859-8999 1-800-RACAL-ATE 1-800-722-2528 FAX: 1-714-849-2505 Racal Instruments Ltd 480 Bath Road Slough, Berkshire SL1 6BE, England Phone: +44 (0) 1628 604455 FAX: +44 (0) 1628 662017 Racal Systems Electronique s.a.

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