AVTECH ELECTROSYSTEMS N A N O S E C O N D P.O. BOX 265 OGDENSBURG, NY U.S.A. 13669-0265 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 TEL: 888-670-8729 (USA & Canada) or +1-613-226-5772 (Intl) FAX: 800-561-1970 (USA & Canada) or +1-613-226-2802 (Intl) info@avtechpulse.com - LTD. http://www.avtechpulse.com/ INSTRUCTIONS MODEL AVR-GHV1-B 0 TO 500 Volts, 1 kHz PULSE GENERATOR WITH IEEE 488.
WARRANTY Avtech Electrosystems Ltd. warrants products of its manufacture to be free from defects in material and workmanship under conditions of normal use. If, within one year after delivery to the original owner, and after prepaid return by the original owner, this Avtech product is found to be defective, Avtech shall at its option repair or replace said defective item.
TABLE OF CONTENTS WARRANTY.................................................................................................................... 2 TECHNICAL SUPPORT.................................................................................................. 2 TABLE OF CONTENTS.................................................................................................. 3 INTRODUCTION.............................................................................................................
PREVENTING OUTPUT STAGE FAILURE............................................................................ 25 OPERATIONAL CHECK............................................................................................... 26 PROGRAMMING YOUR PULSE GENERATOR........................................................... 29 KEY PROGRAMMING COMMANDS......................................................................................29 ALL PROGRAMMING COMMANDS..................................................
INTRODUCTION The AVR-GHV1-B is a high performance, GPIB and RS232-equipped instrument capable of generating 0 to 500V at repetition rates up to 1 kHz into high-impedance loads of 100 kΩ or higher. The pulse width is variable from 200 ns to 500 ms, and the duty cycle may be as high as 80%. Rise and fall times are fixed at less than 40 ns. The AVR-GHV1-B includes an internal trigger source, but it can also be triggered or gated by an external source.
AVAILABLE OPTIONS -BR Option: This optional feature allows a burst of 1-500 pulses to be generated in response to each trigger event. -HN Option: The standard N-type output connector is replaced with an HN-type connector. -MHV Option: The standard N-type output connector is replaced with an MHV-type connector. -SHV Option: The standard N-type output connector is replaced with an SHV-type connector. -R5 Option: Rack-mount kit.
HIGH-VOLTAGE PRECAUTIONS CAUTION: This instrument provides output voltages as high as 500 Volts under normal operating conditions, and generates up to 530V internally, so extreme caution must be employed when using this instrument. The instrument should only be used by individuals who are thoroughly skilled in high voltage laboratory techniques. The following precautions should always be observed: 1) Keep exposed high-voltage wiring to an absolute minimum.
SPECIFICATIONS Model: AVR-GHV1-B1 Amplitude: 0 to 500 Volts Pulse width (FWHM) : 2 Load impedance: 200 ns to 0.5 sec ≥ 100 kΩ Output impedance: 50 Ω (i.e., internal resistance in series with the output). 7 Rise time (20%-80%) : ≤ 40 ns Fall time (80%-20%) : ≤ 40 ns 7 PRF: Duty cycle: Polarity3: GPIB and RS-232 control1: LabView Drivers: Telnet / Ethernet control4: Burst mode: 1 Hz to 1 kHz 0 - 80 % Positive or negative or both (specify) Standard on -B units Check http://www.avtechpulse.
EUROPEAN REGULATORY NOTES EC DECLARATION OF CONFORMITY We Avtech Electrosystems Ltd. P.O. Box 5120, LCD Merivale Ottawa, Ontario Canada K2C 3H4 declare that this pulse generator meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility.
WEEE compliance (as mandated in Directive 2002/96/EC of the European Union and local laws) on behalf of the customer, as provided for under Article 9 of Directive 2002/96/EC. Customers who have purchased Avtech equipment through local representatives should consult with the representative to determine who has responsibility for WEEE compliance. Normally, such responsibilities with lie with the representative, unless other arrangements (under Article 9) have been made.
INSTALLATION VISUAL CHECK After unpacking the instrument, examine to ensure that it has not been damaged in shipment. Visually inspect all connectors, knobs, liquid crystal displays (LCDs), and the handles. Confirm that a power cord, a GPIB cable, and two instrumentation manuals (this manual and the “Programming Manual for -B Instruments”) are with the instrument. If the instrument has been damaged, file a claim immediately with the company that transported the instrument.
Destination Region Description Manufacturer Part Number Continental Europe European CEE 7/7 “Schuko” 230V, 50Hz Volex (http://www.volex.com) 17850-C3-326 Qualtek (http://www.qualtekusa.com) 319004-T01 United Kingdom BS 1363, 230V, 50Hz Qualtek (http://www.qualtekusa.com) 370001-E01 Switzerland SEV 1011, 2 30V, 50Hz Volex (http://www.volex.com) 2102H-C3-10 Israel SI 32, 220V, 50Hz Volex (http://www.volex.
4) maximum relative humidity 80 % for temperatures up to 31 °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 driver for this instrument is available for download on the Avtech web site, at http://www.avtechpulse.com/labview. A copy is also available in National Instruments' Instrument Driver Library at http://www.natinst.com/.
FUSES This instrument contains four fuses. All are accessible from the rear-panel. Two protect the AC prime power input, and two protect the internal DC power supplies. The locations of the fuses on the rear panel are shown in the figure below: Fuses #1 and #2 (AC fuses) Fuse #4 (DC fuse) Fuse #3 (DC fuse) AC FUSE REPLACEMENT To physically access the AC fuses, the power cord must be detached from the rear panel of the instrument.
DC FUSE REPLACEMENT The DC fuses may be replaced by inserting the tip of a flat-head screwdriver into the fuse holder slot, and rotating the slot counter-clockwise. The fuse and its carrier will then pop out. FUSE RATINGS The following table lists the required fuses: Fuses Nominal Mains Voltage #1, #2 (AC) 100-240V #3 (DC) N/A #4 (DC) N/A Rating 0.5A, 250V, Time-Delay 1.6A, 250V, Time-Delay 0.
FRONT PANEL CONTROLS 1 2 3 6 5 4 1. POWER Switch. This is the main power switch. When turning the instrument on, there may be a delay of several seconds before the instrument appears to respond. 2. OVERLOAD Indicator. When the instrument is powered, this indicator is normally green, indicating normal operation. If this indicator is yellow, an internal automatic overload protection circuit has been tripped.
“Programming Manual for -B Instruments” describes the menus and submenus in detail. 6. KEYPAD. Control Name MOVE CHANGE ×10 ÷10 +/EXTRA FINE ADJUST Function This moves the arrow pointer on the display. This is used to enter the submenu, or to select the operating mode, pointed to by the arrow pointer. If one of the adjustable numeric parameters is displayed, this increases the setting by a factor of ten.
REAR PANEL CONTROLS 4 5 8 GATE LAN 1 3 GRN=LNK YEL=ACT TRIG RS-232 AMP GPIB 9 6 7 2 1. AC POWER INPUT. An IEC-320 C14 three-pronged recessed male socket is provided on the back panel for AC power connection to the instrument. One end of the detachable power cord that is supplied with the instrument plugs into this socket. 2. AC FUSE DRAWER. The two fuses that protect the AC input are located in this drawer. Please see the “FUSES” section of this manual for more information. 3. DC FUSES.
6. GPIB Connector. A standard GPIB cable can be attached to this connector to allow the instrument to be computer-controlled. See the “Programming Manual for -B Instruments” for more details on GPIB control. 7. RS-232 Connector. A standard serial cable with a 25-pin male connector can be attached to this connector to allow the instrument to be computer-controlled. See the “Programming Manual for -B Instruments” for more details on RS-232 control. 8. LAN Connector and Indicator. (Optional feature.
GENERAL INFORMATION BASIC PULSE CONTROL This instrument can be triggered by its own internal clock or by an external TTL trigger signal. In either case, two output channels respond to the trigger: OUT and SYNC. The OUT channel is the signal that is applied to the load. Its amplitude and pulse width are variable. The SYNC pulse is a fixed-width TTL-level reference pulse used to trigger oscilloscopes or other measurement systems.
> 50 ns TRIG (external input) TTL LEVELS (0V and 3V-5V) PROPAGATION DELAY (FIXED) 100 ns, FIXED SYNC OUT 3V, FIXED DELAY > 0 PULSE WIDTH AMPLITUDE, VARIABLE MAIN OUTPUT Figure C As before, if the delay is negative, the order of the SYNC and OUT pulses is reversed. The last figure illustrates the relationship between the signal when an external TTL-level trigger is used in the PW IN=PW OUT mode.
TRIGGER MODES This instrument has four trigger modes: • Internal Trigger: the instrument 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 instrument is triggered by the front-panel “SINGLE PULSE” pushbutton. • Hold Trigger: the instrument is set to not trigger at all.
OUTPUT IMPEDANCE The AVR-GHV1-B has an output impedance (i.e., an internal resistance in series with the output) of 50 Ohms, to provide transmission line back-matching and short-circuit protection. The rise and fall times are fixed at less than 40 ns. However, since the output impedance is 50Ω, the rise and fall times will degrade if cable lengths longer than 1 meter (3 feet) are used on the output, due to the cable capacitance. The maximum usable cable length is 2 meters (6 feet).
> 50 ns TRIG (external input) TTL LEVELS (0 and 3V-5V) PROPAGATION DELAY (FIXED) SYNC OUT DELAY (VARIABLE) PULSE WIDTH (VARIABLE) BURST COUNT (N), VARIABLE FROM 1 TO 500. (N = 3, IN THIS EXAMPLE) MAIN OUTPUT BURST PULSE SEPARATION The burst mode may also be used with the front-panel “Single Pulse” pushbutton as a trigger source. (Pressing the pushbutton will actually generate a single burst, rather than a single pulse, in this mode.) Computer commands can also trigger a burst.
PREVENTING OUTPUT STAGE FAILURE The output stage is protected against overload conditions by an overload circuit and fuses on the main frame back panel. However, the output switching elements may fail if the unit is triggered at a PRF exceeding 1 kHz or if the load impedance is too low (< 100 kΩ or > 330 pF). Heating and subsequent possible failure of the output stage is reduced if the following action is taken where possible: • PRF is kept to a minimum, i.e.
OPERATIONAL CHECK This section describes a sequence to confirm the basic operation of the instrument. It should be performed after receiving the instrument. It is a useful learning exercise as well. Before proceeding with this procedure, finish read this instruction manual thoroughly. Then read the “Local Control” section of the “Programming Manual for -B Instruments” thoroughly.
3. Turn on the AVR-GHV1-B. The main menu will appear on the LCD. 4. To set the AVR-GHV1-B to trigger from the internal clock at a PRF of 1 kHz: The arrow pointer should be pointing at the frequency menu item. If it is not, press the MOVE button until it is. Press the CHANGE button. The frequency submenu will appear. Rotate the ADJUST knob until the frequency is set at 1 kHz. The arrow pointer should be pointing at the “Internal” choice. If it is not, press MOVE until it is.
Press MOVE until the arrow pointer is pointing at the “ON” choice. Press CHANGE to return to the main menu. 9. To change the output amplitude: Press the MOVE button until the arrow pointer is pointing at the amplitude menu item. Press the CHANGE button. The amplitude submenu will appear. Rotate the ADJUST knob until the amplitude is set at +200V (or -200V for "-N" instruments). Observe the oscilloscope. You should see 1 us wide, 200V pulses. Rotate the ADJUST knob.
PROGRAMMING YOUR PULSE GENERATOR KEY PROGRAMMING COMMANDS The “Programming Manual for -B Instruments” describes in detail how to connect the pulse generator to your computer, and the programming commands themselves. A large number of commands are available; however, normally you will only need a few of these.
ALL PROGRAMMING COMMANDS For more advanced programmers, a complete list of the available commands is given below. These commands are described in detail in the “Programming Manual for -B Instruments”. (Note: this manual also includes some commands that are not implemented in this instrument. They can be ignored.
:SBITS :ERRor :[NEXT]? :COUNT? :VERSion? TRIGger: :SOURce *CLS *ESE *ESR? *IDN? *OPC *SAV *RCL *RST *SRE *STB? *TST? *WAI 1|2 [query only] [query only] [query only] INTernal | EXTernal | MANual | HOLD | IMMediate [no query form] [query only] [query only] 0|1|2|3 0|1|2|3 [no query form] [no query form] [no query form] [query only] [query only] [no query form]
MECHANICAL INFORMATION TOP COVER REMOVAL If necessary, the interior of the instrument may be accessed by removing the four Phillips screws on the top panel. With the four screws removed, the top cover may be slid back (and off). Always disconnect the power cord and allow the instrument to sit unpowered for 10 minutes before opening the instrument. This will allow any internal stored charge to discharge. There are no user-adjustable internal circuits.
MAINTENANCE REGULAR MAINTENANCE This instrument does not require any regular maintenance. On occasion, one or more of the four rear-panel fuses may require replacement. All fuses can be accessed from the rear panel. See the “FUSES” section for details. CLEANING If desired, the interior of the instrument may be cleaned using compressed air to dislodge any accumulated dust. (See the “TOP COVER REMOVAL” section for instructions on accessing the interior.) No other cleaning is recommended.
WIRING DIAGRAMS WIRING OF AC POWER 3 Do not attempt any repairs on this instrument beyond the fuse replacement procedures described in the manual. Contact Avtech if the instrument requires servicing. Service is to be perf ormed solely by qualified service personnel. 4 TO LCD TO ENCODER 22-01- 1022, 08-56- 0110. RTV SEAL. TO LCD A K C2 - GR N C1 - RE D TO PCB 108 19002-0001 G 1b 1 1a 1 3 A3 - BLACK A4 - WHITE 5 G3 2b Molex 19002-0009. 0.187" x 0.
PCB 158K - LOW VOLTAGE POWER SUPPLY, 1/3 1 2 3 4 5 6 D D p cb 158 k _ ov p p cb 158 k _ ov p .sch C +1 5V -1 5 V C +1 5V GN D -1 5 V BU+ P-OU T # 1 J3 6 5 4 3 2 1 64 04 4 5 -6 J4 8 7 6 5 4 3 2 1 p cb 158 k _ switchin g p cb 158 k _ switchin g .
PCB 158K - LOW VOLTAGE POWER SUPPLY, 2/3 1 2 3 D 4 5 6 D B X TP6 TEST-LOO P 4 TP3 TEST-LOO P 3 6 4 04 4 5 -6 J6 S1 A 1 S1 B, OR D C 2 S2 A, O R DC 3 S2 B 4 5 6 1 2 A A F3 8 3 08 3 5 FUSEHO LDER L5 BU+ 43 4- 13 -1 0 0 M C2 0 47 uF,5 0V C2 1 2 .2u F R2 0 C2 2 10K 1 0 00 uF,3 5 V (P5 16 9 -ND ) C1 6 C19 4 7uF,5 0V D7 1 .
PCB 158K - LOW VOLTAGE POWER SUPPLY, 3/3 1 2 3 4 5 6 R2 1 1 .5 K O Y CAPBANK C23 1 000 u F,35 V (P5 16 9 -ND ) 1 N5 3 0 5 L6 27 1 1 HV WA RN ING R1 7 D SHO RTS OU T B ASE WHEN C HAR GING. 4 0 , IF OLO USES EXT PS. N OT N ORMA LLY IN STA LLED. 3 EXT R1 5 K4 RELA Y - PS7 2 00 1 D4 0 .1 u F R4 150 Vin C25 4 7uF,5 0V NO T N ORMALLY USED (0 .
PCB 168B - HIGH VOLTAGE DC POWER SUPPLY 1 2 3 4 5 6 D D X2 X1 J3 HV WA RN ING 2 1 HV WA RN ING J4 D5 D4 1 N4 9 3 7 1 N4 9 3 7 6 4 04 4 5 -2 2 1 6 4 04 4 5 -2 D3 D2 1 N4 9 3 7 R8 1 0 0 OY 1 N4 9 3 7 C C R1 0 R1 1 BLEED BLEED R9 9 8 GN D GN D OU T OU T 11 10 BLEED 12 13 GN D +2 4V I N M ON EN GN D AD JUST REF OUT CASE CASE UV 1 1 /8 A 24 -P2 0 R6 1 2 3 4 5 6 7 R4 R5 B CW B W D1 1 N4 7 5 0 C1 2 .
PCB 183A-S AND 183A-P CAPACITOR BANKS 1 2 3 4 5 6 D D X2 183A-S (SERIES CAPACITOR BANK) J1 1 2 R1 R2 P1 7 2 00 K -ND, Mfg . 7 2 0 0, 4 -4 0 th read stan do ff 3 /8" J3 R3 P2 2 1 P3 HV + GN D J2 J4 X4 7 2 00 K -ND, Mfg . 7 2 0 0, 4 -4 0 th read stan do ff 3 /8" X8 X9 X1 1 HV WA RN ING HV WA RN ING HV WA RN ING X1 X3 X7 X5 C 2 1 R4 R5 N1 R6 N2 C 2 1 N3 HV - 7 2 00 K -ND, Mfg . 7 2 0 0, 4 -4 0 th read stan do ff 3 /8" GN D X6 7 2 00 K -ND, Mfg .
PCB 156 – POLARITY CONTROL (-PN UNITS ONLY) 1 2 3 56K SUR FA CE MOU NT, ON B OTTOM. D 2 OY OY 3 1K D2 1 N4 7 3 6A U2 A 5 7 10K U5 A UV + H IGH 2 U3 A 2 6 1 1 3 LM3 5 8 R2 9 1K R1 6 1K Q1 A MPQ 60 0 2 D NTRIG SMA 1 3 R1 7 470 LM3 9 3 7 4 ALS02 2 7 4 ALS08 13 Q1 C MPQ 60 0 2 14 F1 YS4 0 2 0 1 R2 4 VCC P4 UV - on U4 B R2 0 4 HV + R3 5 R1 2 3K 1 0 .1 u F "UV- ON" IS HIGH IF: 1) "UV+ HIGH" IS LOW, AND 2) "POL" IS LOW.
PCB 104D - KEYPAD / DISPLAY BOARD, 1/3 1 2 3 4 5 6 D D AH E10 G- ND, Mfg 49 9 9 10 -1, 1 0 pin straig h t h ead er J5 1 2 3 4 5 6 7 8 9 10 C C LCD-BUTT LCD-BUTT.SCH SDA SCL GN D VCC VCC-LED BACKLIG HT ENCOD ER ENCOD ER.SCH SDA SCL GN D VCC B I2 C_ INT SING LE PULSE B BACKLIG HT A A Title Date PANEL TOP-LEVEL SCHEMATIC Rev ision 17-Dec-2004 P: \pcb\104d\ keypad-2004.DDB - Documents\Panelbrd.
PCB 104D - KEYPAD / DISPLAY BOARD, 2/3 1 2 3 4 5 6 U4 A VCC C1 0 PIN3 U7 1 2 3 4 5 6 7 8 Q1 PIN3 1 MMBT2 2 2 2A PIN3 0 PIN2 9 PIN2 8 1 2 15K VCC VCC 16 15 14 13 12 11 10 9 A0 VCC A1 SDA A2 SCL P0 IN T P1 P7 P2 P6 P3 P5 GN D P4 MM7 4H C1 4 N 4 D 3 MM7 4H C1 4 N U4 C C1 2 6 5 2 .
PCB 104D - KEYPAD / DISPLAY BOARD, 3/3 1 2 3 4 5 6 VCC VCC C5 0 .1 u F GN D C8 2 2 uF D D VCC U5 1 2 3 4 5 6 7 8 PAD 3 PAD 4 LED+ LED- A0 VCC A1 SDA A2 SCL P0 IN T P1 P7 P2 P6 P3 P5 GN D P4 VCC 16 15 14 13 12 11 10 9 SDA SCL PCF8 57 4A PN C U1 A LCD POW ER C U1 C 1 2 5 6 MM7 4H C1 4 N MM7 4H C1 4 N U1 D U1 F VCC U1 B 3 4 9 MM7 4H C1 4 N 8 MM7 4H C1 4 N 13 RN4 R3 2 .
MAIN WIRING – POSITIVE (-P) UNITS 1 2 3 4 5 6 -TNT OPTION ONLY D CON N1 L-COM ECF5 0 4 -SC5 VCC LED MO UN T X1 USE 1/2"STANDOFFS P1, P2: 33uF, 400V P3: JUMPER PA DSWITH #20 BUSBA R N1-N3: UNUSED R1,R2 (BOT): 100K OY R3-R6 (BOT): UN USED GRN + P3 ,R3 N3 ,R6 D1 P3 95 -N D LED + +1 5V +5 V AMB BD1 PCB 1 8 3A -S - TO PS158, J1 D L-COM TRD855SIG- 1 CA BLE VPRF VSPARE WHT BLK RED ACT GN D LNK SYN C + HV N/ C GN D GN D GN D +1 5V +5 V TR IG SSR - - C P1 ,R1 N1 ,R4 + G G - G G +
MAIN WIRING – DUAL POLARITY (-PN) UNITS 1 2 3 4 5 6 USE 1/2"STANDOFFS + - - + + - G G N1 ,R 4 N2 ,R 5 + P1 ,R 1 - - ISOLATEFROM OTHER LINES P2 ,R 2 + P3 ,R 3 D N3 ,R 6 P1, P2, N1, N2: 33uF, 400V P3, N3: JUMPER PADS WITH #20 BUSBAR R1,R2,R4,R5 (BOT): 100K OY R3, R6 (BOT): UNUSED BD2 - D + + + G G PCB 1 8 3A -S FEED-THRU BOTH SIDESOFPCB158 CONNECTOR (I.E., SEPARATEPATHSFROMPCB158 FOR EACH UV).
PERFORMANCE CHECK SHEET
