Stanford Research Systems DG535 Operation And Service Manual Download Page 19 | Manualshive

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other. The pulling of one channel by the other is
typically less than 100 ps.

TIME DELAY vs REPETITION RATE

The time delay for any channel may change by
200 ps as the pulse repetition rate is changed
from single shot to the maximum rate of 1/(1 µs
+ longest delay). The burst mode of triggering
is, effectively, a rapid change of the pulse
repetition rate.

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Summary of Contents for DG535

Page 1: ...MODEL DG535 Digital Delay Pulse Generator 1290 D Reamwood Avenue Sunnyvale CA 94089 U S A Phone 408 744 9040 Fax 408 744 9049 Copyright 1994 1997 2000 All Rights Reserved Revision 2 5 11 2000...

Page 2: ...Power Button 1 Liquid Crystal Display 1 Menu Keys 1 Data Entry Keys 1 Trigger Status LED s 1 Delay Outputs 1 Pulse Outputs 2 Option 06 Trigger Inhibit Input 2 Rear Panel Features 2 Power Entry Module...

Page 3: ...ut Levels 17 Jitter 17 GPIB Problems 18 CALIBRATION Required Equipment 19 Calibration Procedure 19 Trigger Threshold Calibration 19 Optional 1 ppm Internal Timebase Calibration 19 Output Amplitude Cal...

Page 4: ...Power Supplies 29 Rear Panel Output Drivers 30 PARTS LISTS Top PCB 32 Bottom PCB 32 Front PCB 37 Optional Outputs PC Board 37 Miscellaneous and Chassis Assembly 38 PC LAYOUT Top PCB 39 Bottom PCB 40 F...

Page 5: ...nd Multiplexer Sheet 12 Power Regulators Front PCB Optional Outputs PCB Table of Figures Figure 1 DG535 Rear Panel Page 2 Figure 2 DG535 Front Panel Page 3 Figure 3 Maximum Error vs Time Delay Page 6...

Page 6: ...liers and insert it with the correct line voltage facing the bottom of the instrument and towards the line cord Verify that the correct line voltage can be seen through the slot that is just above the...

Page 7: ...tings 4 Press the left cursor key twice to select internal trigger 5 Trigger the oscilloscope on the rising edge of T0 s output and display A s output on the 1 s div scale 6 Press the DELAY Menu key a...

Page 8: ...Impedance 1 M 40 pF or 50 Option 06 TTL front panel trigger inhibit input OUTPUTS T0 A B C D AB AB CD and CD Load 50 or high impedance Risetime 2 to 3 ns typical Slew Rate 1 Volt ns Overshoot 100mV 1...

Page 9: ...B A 000 000 001 200 000 seconds OUTPUTS TZ i j Set the Termination Impedance Z Output i is configured to drive a 50 load j 0 or a high Z load j 1 OM i j Set Output i to Mode j where j 0 3 for TTL NIM...

Page 10: ...turn and a line feed The line feed is sent with an EOI The Delay and Output commands use integer codes which are assigned to each front panel BNC The table for these assignment is given below Integer...

Page 11: ...data received via the GPIB and to set the GPIB address STORE and RECALL provide a convenient method to save all of the instrument settings Detailed descriptions of each of these menus will be given DA...

Page 12: ...nt of this manual for instructions on selecting the correct line voltage and fuse IEEE 488 STD PORT The 24 pin IEEE 488 rear panel connector allows a computer to control the DG535 The command syntax f...

Page 13: ...average output current is only 0 7 mA for a 32 Volt output into 50 at a 1 kHz repetition rate For high impedance terminations charging and discharging of the cable capacitance may be the most importa...

Page 14: ...may be entered as a floating point number or may be modified in the cursor mode The Slope may be selected by using the cursor up down keys as can the Trigger termination impedance The threshold slope...

Page 15: ...lable links Not all links are available for example in the above menus linking channel A to channel B is not allowed as B is linked to channel A in the second menu Delay can be scrolled by first selec...

Page 16: ...AR is selected then the next two submenus are used to set the amplitude and offset of the outputs GPIB MENUS There are three menus which are accessed by the GPIB key They are Data _______________ GPIB...

Page 17: ...and D may be programmed to time out from 0 to 1000 seconds with a resolution of 5 ps The factors which detract from this ideal performance are discussed here ACCURACY The error in the time delay betw...

Page 18: ...tribution and the relations between the rms jitter and the peak to peak jitter The rms jitter is a function of the delay setting The jitter is about 50 ps rms for delays less than100 s For short delay...

Page 19: ...ps TIME DELAY vs REPETITION RATE The time delay for any channel may change by 200 ps as the pulse repetition rate is changed from single shot to the maximum rate of 1 1 s longest delay The burst mode...

Page 20: ...are set to drive high impedance loads to TTL levels GPIB The GPIB address is not affected but the terminator is returned to its default value of a carriage return and a line feed with an EOI GT i j k...

Page 21: ...that bit will stay set until the IS command is sent All bits except the BUSY bit will be reset to 0 after the IS command is executed See the IS i command to test one bit of the Instrument Status byte...

Page 22: ...r rate too high bit is set When a service request is generated the corresponding bit in the Service Request Mask is turned off This will prevent an uncontrolled stream of service requests from being g...

Page 23: ...f VAR selected 2 3 4 B Inverted Normal For TTL NIM and ECL 2 4 0 AB AB Loads 50 AB output control menu 2 4 1 AB TTL NIM ECL VAR 2 4 2 AB Amplitude 1 23 2 4 3 AB Offset 2 43 2 5 0 C Load 50 C Output Co...

Page 24: ...he Delay and Output commands use integer codes which are assigned to each front panel BNC The table for these assignment is given below Integer Assignment 0 Trigger Input 1 T0 Output 2 A Output 3 B Ou...

Page 25: ...8VDC when the channel times out TRIGGER COMMANDS TM i Set Trigger Mode to Int Ext SS or Bur i 0 1 2 3 This command selects between Internal External Single Shot or Burst trigger modes Other trigger c...

Page 26: ...TM 3 TR 1 1E5 BC 100 BP 101 sets the burst mode of operation with a trigger rate of 100KHz There will be 100 pulses in each burst one trigger will be skipped and a new burst of pulses will start STORE...

Page 27: ...ide of the instrument will blink once each time the EXC key is pressed Now press the left arrow key the 4 key twice to select the Internal trigger source The default trigger rate is 10 kHz so the TRIG...

Page 28: ...if it is addressed and the Remote Enable line REN is asserted When this happens the front panel goes to the REMote state which disables all of the keys except the keyboard mode key which allows the us...

Page 29: ...han 5ns pulses such as an SRS DG535 You will also need several 50 coax cables and about ten 50 terminators CALIBRATION PROCEDURE Start by setting the instrument to the default settings with a RECALL 0...

Page 30: ...n menus you must hold down the BSP key then press a menu key Each menu key is used to access a different calibration factor per the following table Menu Key Name Function TRIG Jitter Cal Minimize jitt...

Page 31: ...e to the oscilloscope Both cables should be terminated into 50 With this arrangement the T0 output sees a 25 load and so the pulse amplitude will be 2 V The jitter from the External Trigger input to a...

Page 32: ...and the status LED s is connected to the top PCB by a 20 pin ribbon cable The octal latch U409 controls the eight status LED s The eight switch lines SWR1 SWR8 are normally held low by RN701 A key pr...

Page 33: ...8 P3_CS Internal rate generator control 50 P2_CS Analog MUX select 48 P1_CS Output polarity and trigger source 40 DISP_CS Front panel LCD select 38 Spare to bottom PCB 30 DAC_CS Write strobe to 12bit...

Page 34: ...s buffered by Q504 and used to control the frequency of the varactor tuned LC tank oscillator The window comparator U507 is used to detect gross frequency errors as might be expected if an external re...

Page 35: ...applied to the differential pair formed by Q104 and Q105 which shifts the comparator s output to ECL levels A 1K resistor from the collector of Q104 to the source of Q114 provides about 100mV of hyste...

Page 36: ...oltage on C106 is buffered by Q109 a J310 FET level shifted by D102 a 12V Zener to drive the base of the emitter follower Q110 The emitter of Q110 is the source of the jitter compensation voltage for...

Page 37: ...ycles which must be counted For very short delays the output A N may be preset high by setting the output of the last LSI counter U206 pin 17 low In this case the LSI counters are not used in the dela...

Page 38: ...eset cycle timing The reset cycle can be initiated by the Z 80 by asserting the CPU_RELOAD signal CPU reloads are required when the digital delays are changed so that the counters will be preset to th...

Page 39: ...are controlled together i e the offset current sources are both controlled by the same menu item from the front panel POWER SUPPLIES The unit uses a linear power supply to generate 15 6 0 5 2 5 0 2 0...

Page 40: ...shown in the position for positive output pulses When Q1A is turned on the capacitors C4A and C5A which were charged to 20 VDC through R9A are connected to the capacitors C2A and C3A which were precha...

Page 41: ...31...

Page 42: ...ircuit Thru hole Pkg U 102 3 00049 340 74HC74 Integrated Circuit Thru hole Pkg U 103 3 00171 340 74HC191 Integrated Circuit Thru hole Pkg U 104 3 00171 340 74HC191 Integrated Circuit Thru hole Pkg U 1...

Page 43: ...ked Metal Film 50V 5 40 85c C 316T 5 00056 512 1U Cap Stacked Metal Film 50V 5 40 85c C 317A 5 00002 501 100P Capacitor Ceramic Disc 50V 10 SL REF SRS PART VALUE DESCRIPTION C 317B 5 00002 501 100P Ca...

Page 44: ...4 421 10KX4 Res Network SIP 1 4W 2 Isolated N 315E 4 00244 421 10KX4 Res Network SIP 1 4W 2 Isolated REF SRS PART VALUE DESCRIPTION N 315F 4 00244 421 10KX4 Res Network SIP 1 4W 2 Isolated N 315G 4 00...

Page 45: ...5K Resistor Carbon Film 1 4W 5 REF SRS PART VALUE DESCRIPTION R 144 4 00059 401 22K Resistor Carbon Film 1 4W 5 R 145 4 00030 401 10 Resistor Carbon Film 1 4W 5 R 147 4 00138 407 10 0K Resistor Metal...

Page 46: ...REF SRS PART VALUE DESCRIPTION R 331C 4 00090 401 560 Resistor Carbon Film 1 4W 5 R 331D 4 00090 401 560 Resistor Carbon Film 1 4W 5 R 331T 4 00090 401 560 Resistor Carbon Film 1 4W 5 R 332A 4 00048...

Page 47: ...Panel Mount Power Rocker Z 0 4 00214 407 90 9K Resistor Metal Film 1 8W 1 50PPM Z 0 6 00043 611 1 5A 3AG Fuse Z 0 7 00067 711 DG535 18 Rear Panel Z 0 7 00069 720 DG535 22 Fabricated Part Z 0 7 00070 7...

Page 48: ...Carbon Film 1 4W 5 R 8C 4 00030 401 10 Resistor Carbon Film 1 4W 5 R 8D 4 00030 401 10 Resistor Carbon Film 1 4W 5 R 8T 4 00030 401 10 Resistor Carbon Film 1 4W 5 R 9A 4 00021 401 1 0K Resistor Carbon...

Page 49: ...39...

Page 50: ...40...

Page 51: ...41...

Page 52: ...e fast falltime model These units can provide step amplitudes of up to 3 7 V with some increase in distortion and up to 15 V when used with option 02 rear panel outputs and option 04C bias tee OPERATI...

Page 53: ...nce of 50 will allow larger pulse amplitudes at the expense of increased ringing after the fast transition Pulse aberrations after the fast transition will be about 10 or about 3x larger than the puls...

Page 54: ...hich should be limited so that the absolute maximum current rating for the SRD 100 mA is not exceeded A forward bias current of about 40 mA will be required for a 15 V output pulse SETUP FOR OUTPUT ST...

Page 55: ......

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