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Avtech AVR-E3A-B, Instructions Manual, Page: 21 / 40

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Avtech AVR-E3A-B Instructions Manual Download Page 21

GATING MODES

 

 

Triggering can be suppressed by a TTL-level signal on the rear-panel GATE connector.
The instrument can be set to stop triggering when this input high or low, using the front-
panel gate menu or the appropriate programming commands. This input can also be 
set to act synchronously or asynchronously. When set to asynchronous mode, the 
GATE will disable the output immediately. Output pulses may be truncated. When set to
synchronous mode, the output will complete the full pulse width if the output is high, 
and then stop triggering. No pulses are truncated in this mode.

21

Summary of Contents for AVR-E3A-B

Page 1: ...ND RS 232 CONTROL SERIAL NUMBER 14114 A V T E C H E L E C T R O S Y S T E M S L T D N A N O S E C O N D W A V E F O R M E L E C T R O N I C S S I N C E 1 9 7 5 info avtechpulse com http www avtechpuls...

Page 2: ...ace said defective item This warranty does not apply to units which have been dissembled modified or subjected to conditions exceeding the applicable specifications or ratings This warranty is the ext...

Page 3: ...ATION 10 VISUAL CHECK 10 POWER RATINGS 10 CONNECTION TO THE POWER SUPPLY 10 PROTECTION FROM ELECTRIC SHOCK 11 ENVIRONMENTAL CONDITIONS 12 LABVIEW DRIVERS 12 FUSES 13 AC FUSE REPLACEMENT 13 DC FUSE REP...

Page 4: ...INTERFERENCE 31 MAINTENANCE 32 REGULAR MAINTENANCE 32 CLEANING 32 TRIGGER DAMAGE 32 WIRING DIAGRAMS 33 WIRING OF AC POWER 33 PCB 158R5 LOW VOLTAGE POWER SUPPLY 34 PCB 235C HIGH VOLTAGE DC POWER SUPPL...

Page 5: ...0 load The AVR E3A B is a highly flexible instrument Aside from the internal trigger source it can also be triggered or gated by external TTL level signals A front panel pushbutton or a computer comma...

Page 6: ...pically 3 of setting 5 ns Pulse width Typically 3 of setting 2 ns at maximum amplitude As the amplitude is reduced the pulse width may shift 5 ns For high accuracy applications requiring traceable cal...

Page 7: ...g Also check that your load is adequately shielded It may be necessary to enclose the load in a metal enclosure If any of the connectors on the instrument are unused they should be covered with shield...

Page 8: ...tion of conformity is issued under the sole responsibility of Avtech Electrosystems Ltd Specifically products manufactured do not contain the substances listed in the table below in concentrations gre...

Page 9: ...9 have been made Requirements for WEEE compliance may include registration of products with local governments reporting of recycling activities to local governments and financing of recycling activiti...

Page 10: ...mal single phase supply CONNECTION TO THE POWER SUPPLY An IEC 320 three pronged recessed male socket is provided on the back panel for AC power connection to the instrument One end of the detachable p...

Page 11: ...erators are prevented access and or are insulated from every connection point In some cases connections must be exposed to potential human contact Operators must be trained to protect themselves from...

Page 12: ...C decreasing linearly to 50 relative humidity at 40 C 5 Mains supply voltage fluctuations up to 10 of the nominal voltage 6 no pollution or only dry non conductive pollution LABVIEW DRIVERS A LabVIEW...

Page 13: ...the fuses on the rear panel are shown in the figure below AC FUSE REPLACEMENT To physically access the AC fuses the power cord must be detached from the rear panel of the instrument The fuse drawer ma...

Page 14: ...Nominal Mains Voltage Rating Case Size Recommended Replacement Part Littelfuse Part Number Digi Key Stock Number 1 2 AC 100 240V 0 5A 250V Time Delay 5 20 mm 0218 500HXP F2416 ND 3 DC N A 1 6A 250V Ti...

Page 15: ...ed for about 5 seconds after which the instrument will attempt to re enable the output i e light green for about 1 second If the overload condition persists the output will be disabled again i e light...

Page 16: ...is decreases the setting by a factor of ten If one of the adjustable numeric parameters is displayed and this parameter can be both positive or negative this changes the sign of the parameter EXTRA FI...

Page 17: ...f the instrument This input can be either active high or active low depending on the front panel settings or programming commands The instrument triggers normally when this input is unconnected When s...

Page 18: ...ntrol internally See the Programming Manual for B Instruments for more details on RS 232 control 8 Network Connector This Ethernet connector allows the instrument to be remotely controlled using the V...

Page 19: ...set to a positive value the SYNC pulse precedes the OUT pulse When the delay is set to a negative value the SYNC pulse follows the OUT pulse These pulses are illustrated below assuming internal trigg...

Page 20: ...ment controls the trigger frequency and generates the clock internally External Trigger the instrument is triggered by an external TTL level clock on the back panel TRIG connector Manual Trigger the i...

Page 21: ...nel gate menu or the appropriate programming commands This input can also be set to act synchronously or asynchronously When set to asynchronous mode the GATE will disable the output immediately Outpu...

Page 22: ...pplied to this connector which is connected to the output centre conductor through a high quality RF inductor Do not exceed 50V 250 mA DC OFFSET OT OPTION This option adds a bias tee circuit on the ou...

Page 23: ...ned off when the instrument is not in use In the case of failure the switching elements are easily replaced following the procedure described in a following section DO NOT EXCEED 200 kHz The output st...

Page 24: ...roper operation The output stage may be damaged if the output is not terminated into a 50 load The AVR E3A B output may be observed using either a high speed sampling oscilloscope or a slower real tim...

Page 25: ...some sampling oscilloscopes a 20 dB attenuator should be placed at the input to the scope trigger channel d The bandwidth capability of components and instruments used to display the pulse generator o...

Page 26: ...ow pointer should be pointing at the Normal choice If it is not press MOVE until it is d Press CHANGE to return to the main menu 5 To set the pulse width to 100 ns a Press the MOVE button until the ar...

Page 27: ...ting to a value more compatible with your sampling oscilloscope Repeat step 4 if required You may also need to adjust the sampling scope controls d Rotate the ADJUST knob The amplitude as seen on the...

Page 28: ...turns on the output For triggering a single event this sequence would be more appropriate rst resets the instrument trigger source hold turns off all triggering pulse width 50 ns sets the pulse width...

Page 29: ...ed numeric value SOURce PULSe PERiod numeric value WIDTh numeric value DCYCle numeric value HOLD WIDTh DCYCle DELay numeric value GATE TYPE ASYNC SYNC LEVel HIgh LOw SOURce VOLTage LEVel IMMediate AMP...

Page 30: ...nly VERSion query only TRIGger SOURce INTernal EXTernal MANual HOLD IMMediate CLS no query form ESE numeric value ESR query only IDN query only OPC SAV 0 1 2 3 no query form RCL 0 1 2 3 no query form...

Page 31: ...factory for repair Service is to be performed solely by qualified service personnel Caution High voltages are present inside the instrument during normal operation Do not operate the instrument with t...

Page 32: ...s recommended TRIGGER DAMAGE The rear panel TRIG input used in the external trigger mode is protected by a diode clamping circuit However the protection circuit is not foolproof and it is possible for...

Page 33: ...WIRING DIAGRAMS WIRING OF AC POWER...

Page 34: ...PCB 158R5 LOW VOLTAGE POWER SUPPLY...

Page 35: ...PCB 235C HIGH VOLTAGE DC POWER SUPPLY...

Page 36: ...PCB 231A DC OFFSET SOURCE...

Page 37: ...PCB 217B RELAY DRIVER...

Page 38: ...PCB 104G KEYPAD DISPLAY BOARD...

Page 39: ...1 OFFSET 0 10V 2 PW 0 10V 3 SPARE 0 10V 4 O POL 5 O ZOUT PWRNG 6 O LOGIC 7 O SQU 8 O TRI 9 O SINE 10 O EA 11 O A LIVE 12 AMPLRNG4 13 AMPLRNG3 14 AMPLRNG2 15 AMPLRNG1 16 AMPLRNG0 17 XRLY 5 18 XRLY 4 E...

Page 40: ...PERFORMANCE CHECKSHEET 40...

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