Avtec AV-1000-C Instructions Manual

0 to ±10 volts, 50 mhz general purpose pulse generator

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P.O. BOX 265

OGDENSBURG, NY

U.S.A. 13669-0265

A V T E C H

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

INSTRUCTIONS

MODEL AV-1000-C

0 TO ±10 VOLTS, 50 MHz

GENERAL PURPOSE PULSE GENERATOR

SERIAL NUMBER: ____________

E L E C T R O S Y S T E M S

N A N O S E C O N D

W A V E F O R M

S I N C E

http://www.avtechpulse.com/

E L E C T R O N I C S

1 9 7 5

BOX 5120, LCD MERIVALE

OTTAWA, ONTARIO

CANADA

L T D .

K2C 3H4

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Summary of Contents for Avtec AV-1000-C

Page 1 TEL: 888-670-8729 (USA & Canada) or +1-613-226-5772 (Intl) BOX 5120, LCD MERIVALE OGDENSBURG, NY FAX: 800-561-1970 (USA & Canada) or +1-613-226-2802 (Intl) OTTAWA, ONTARIO U.S.A. 13669-0265 CANADA K2C 3H4 info@avtechpulse.com http://www.avtechpulse.com/ INSTRUCTIONS MODEL AV-1000-C 0 TO ±10 VOLTS, 50 MHz GENERAL PURPOSE PULSE GENERATOR SERIAL NUMBER: ____________...
Page 2: Warranty
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.
Page 3: Table Of Contents
TABLE OF CONTENTS WARRANTY........................2 TECHNICAL SUPPORT....................2 TABLE OF CONTENTS....................3 INTRODUCTION......................5 SPECIFICATIONS......................6 EUROPEAN REGULATORY NOTES................7 EC DECLARATION OF CONFORMITY..................7 DIRECTIVE 2002/95/EC (RoHS)....................7 DIRECTIVE 2002/96/EC (WEEE)....................7 INSTALLATION....................... 9 VISUAL CHECK........................9 POWER RATINGS........................9 CONNECTION TO THE POWER SUPPLY................9 PROTECTION FROM ELECTRIC SHOCK................10 ENVIRONMENTAL CONDITIONS..................
Page 4 AVOID SHORT CIRCUITS...................... 25 USE THE LOWEST PRACTICAL AMPLITUDE RANGE............25 OPERATIONAL CHECK....................26 TYPICAL WAVEFORMS....................29 TYPICAL RISE/FALL TIMES....................29 ADJUSTABLE RISE/FALL TIMES..................29 50 MHz OPERATION......................30 MECHANICAL INFORMATION..................31 TOP COVER REMOVAL......................31 RACK MOUNTING........................31 ELECTROMAGNETIC INTERFERENCE................31 MAINTENANCE......................
Page 5: Introduction
INTRODUCTION The Avtech AV-1000-C is a versatile, general-purpose, low-cost, 50 MHz laboratory pulse generator, useful everywhere from undergraduate university classrooms to the most advanced research and development laboratories. This pulse generator features variable pulse repetition frequency (PRF), delay, pulse width, rise and fall times, amplitude, and baseline.
Page 6: Specifications
SPECIFICATIONS Model: AV-1000-C PRF: 1 Hz to 50 MHz Amplitude (to 50 Ohms): Main output: 0 to ±10 Volts (adjustable) TTL outputs (normal and inverted): low: 0 to +0.8V, high: +3 to +5V (fixed) ECL outputs (normal and inverted): low: -1.6V, high: -0.8V (fixed) Pulse width: 10 ns to 1.0 sec...
Page 7: European Regulatory Notes
EUROPEAN REGULATORY NOTES EC DECLARATION OF CONFORMITY 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. Compliance pertains to the following specifications as listed in the official Journal of the European Communities: EN 50081-1 Emission EN 50082-1 Immunity...
Page 8 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.
Page 9: Installation
INSTALLATION VISUAL CHECK After unpacking the instrument mainframe and the transformer module, examine to ensure that they have not been damaged in shipment. Visually inspect all connectors, knobs, and handles. Confirm that a power cord and an instrumentation manual (this manual), are with the instrument.
Page 10: Protection From Electric Shock
Destination Region Description Manufacturer Part Number European CEE 7/7 Continental Europe Qualtek (http://www.qualtekusa.com) 319004-T01 “Schuko” 230V, 50Hz BS 1363, United Kingdom Qualtek (http://www.qualtekusa.com) 370001-E01 230V, 50Hz SEV 1011, 2 Switzerland Volex (http://www.volex.com) 2102H-C3-10 30V, 50Hz SI 32, Israel Volex (http://www.volex.com) 2115H-C3-10 220V, 50Hz North America,...
Page 11 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.
Page 12: Fuses
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 Fuse #4 Fuse #3...
Page 13: Dc Fuse Replacement
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: Recommended Replacement Part Nominal Fuses...
Page 14: Front Panel Controls
FRONT PANEL CONTROLS 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.
Page 15 decade range. 4. EXT TRIG Connector . When the REPETITION RATE switch (item 3) is set to the “EXT” position, a TTL-level pulse applied to this input will trigger the instrument. The instrument triggers on the rising edge of this input. The input impedance of this input is 1 kΩ.
Page 16 9. DELAY MODE Switch . This switch determines the function of the PULSE DELAY controls (item 10). When this switch is set in the “DOUBLE PULSE” position, the main output (item 19) and the logic outputs (items 12-15) generate a pair of pulses in response to each trigger event.
Page 17 15. NOT-ECL OUT Connector . This output provides an inverted ECL-level pulse (quiescent level: -0.8V, pulse level: -1.6V) whose triggering, delay, and pulse width are controlled by the front-panel controls. This output is the logical complement of the ECL OUT output (item 14). This output will drive a load of 50 Ohms or greater, connected to ground or to -2V.
Page 18: Rear Panel Controls
REAR PANEL CONTROLS 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.
Page 19: General Information
GENERAL INFORMATION BASIC PULSE CONTROL This instrument can be triggered by its own internal clock, by an external TTL trigger signal, or by the front-panel MANUAL TRIGGER pushbutton. In any case, six output channels respond to the trigger: MAIN OUTPUT, SYNC, TTL, NOT-TTL, ECL, and NOT-ECL.
Page 20 If the delay mode is set to “MAIN OUT ADVANCED”, the order of the SYNC and OUT pulses is reversed: 10 ns, FIXED SYNC OUT (generated by the 2V, FIXED internal oscillator) DELAY < 0 PULSE WIDTH AMPLITUDE, VARIABLE MAIN OUTPUT OFFSET, VARIABLE ZERO VOLTS +3V TO +5V (TTL HIGH)
Page 21: Trigger Modes
> 4 ns TRIG TTL LEVELS (external input) (0V and 3V-5V) PROPAGATION DELAY (FIXED) 10 ns, FIXED SYNC OUT 2V, FIXED DELAY > 0 PULSE WIDTH AMPLITUDE, VARIABLE MAIN OUTPUT OFFSET, VARIABLE ZERO VOLTS +3V TO +5V (TTL HIGH) TTL OUTPUT 0V (TTL LOW) +3V TO +5V (TTL HIGH) NOT-TTL OUTPUT...
Page 22: Gating Modes
one of the positions labeled with a frequency (i.e., 1kHz, 10 kHz, etc). The labeled frequency represents the upper end of that frequency range. • External Trigger: the instrument is triggered by an external TTL-level clock on the EXT TRIG connector. This mode is enabled by setting the REPETITION RATE switch to the “EXT”...
Page 23: Minimizing Waveform Distortions
MINIMIZING WAVEFORM DISTORTIONS USE 50 Ω TRANSMISSION LINES Connect the load to the pulse generator with 50Ω transmission lines (e.g. RG-58 or RG- 174 cable). If possible, use a 50Ω load. If the actual device under test has a high impedance, consider adding a 50Ω...
Page 24: When Driving High Impedance Loads
WHEN DRIVING HIGH IMPEDANCE LOADS The ranges are labeled assuming operation into a 50 Ohm load. The ±1V and ±5V ranges will actually generate ±2V and ±10V respectively when driving a high impedance load (>> 50Ω). The ±10V range capabilities are unchanged. When driving a high impedance load (i.e., R >>...
Page 25: Protecting Your Instrument
PROTECTING YOUR INSTRUMENT TURN OFF INSTRUMENT WHEN NOT IN USE The lifetime of the switching elements in the pulse generator module is proportional to the running time of the instrument. For this reason the prime power to the instrument should be turned 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.
Page 26: Operational Check
OPERATIONAL CHECK This check is to confirm that the instrument is fully functional. In all tests, use 50Ω cable with female BNC connectors on each end. Set the controls to the following values: REPETITION RATE RANGE Switch: 1 MHz REPETITION RATE Vernier: fully clockwise (maximum) PULSE DELAY Switch: 100ns PULSE DELAY Vernier: fully counter-clockwise (minimum) PULSE WIDTH Switch: 100ns...
Page 27 REAL-TIME AVTECH OSCILLOSCOPE PULSER SCOPE PROBE MAIN OUTPUT CHANNEL A CONNECTOR TEST LOAD POWER TRIG SYNC INPUT OUTPUT ALL CABLES: 50 OHM COAXIAL STEP CONTROL OPERATION RESULTS +10V pulses at the main output, with period 1 us, pulse width 100ns, < 10 ns POWER Push in (ON) rise and fall times.
Page 28 Oscilloscope shows pulses swinging Remove cable, place on ECL between -0.8V and -1.6V, with period 1 ECL OUT OUT connector us, and pulse width 100ns. Oscilloscope shows inverted pulses Remove cable from ECL OUT swinging between 0V and 3V, with NOT TTL OUT connector, place on NOT TTL period 1 us, and low time 100ns.
Page 29: Typical Waveforms
TYPICAL WAVEFORMS TYPICAL RISE/FALL TIMES 10 kHz repetition rate, 100 ns pulse width, +10V into a 50 Ohm load, with rise and fall times set to minimum: ADJUSTABLE RISE/FALL TIMES 10 kHz repetition rate, +10V into a 50 Ohm load, with rise/fall time range switch set to 1 us, and rise time vernier at minimum and fall time vernier at maximum:...
Page 30: 50 Mhz Operation
50 MHz OPERATION 50 MHz repetition rate, +10V into a 50 Ohm load, with rise and fall times set to minimum, and pulse width near minimum:...
Page 31: Mechanical Information
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.
Page 32: Maintenance
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.
Page 33: Repair Instructions
REPAIR INSTRUCTIONS Caution: High voltages are present inside the instrument during normal operation. Do not operate the instrument with the cover removed. BLOWN FUSES See the “AC FUSE REPLACEMENT” and “DC FUSE REPLACEMENT” for fuse replacement instructions. DAMAGED MAIN OUTPUT The integrated circuit (IC) that generates the MAIN OUTPUT signal is installed in a socket, and may be replaced if it has been damaged through improper use.
Page 34: Performance Check Sheet
PERFORMANCE CHECK SHEET...