Introduction - Avtech AVR-AHF-1-B series Instructions Manual

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INTRODUCTION

The AVR-AHF-1-B is a high performance, GPIB and RS232-equipped instrument
capable of generating up to 250V at repetition rates up to 100 kHz into loads of 50Ω or
higher. The pulse width is variable from 50 to 500 ns, and the duty cycle may be as
high as 4%. Rise and fall times are fixed at less than 10 ns. The AVR-AHF-1-B includes
an internal trigger source, but it can also be triggered or gated by an external source. A
front-panel pushbutton can also be used to trigger the instrument. The output pulse
width can be set to follow an input trigger pulse width.
The output voltage polarity depends on the model number:
"-P" units: up to +250 Volts
"-N" units: up to -250 Volts
"-PN" units: up to ±250 Volts
The AVR-AHF-1-B features front panel keyboard and adjust knob control of the output
pulse parameters along with a four line by 40-character backlit LCD display of the
output amplitude, pulse width, pulse repetition frequency, and delay. The instrument
includes memory to store up to four complete instrument setups. The operator may use
the front panel or the computer interface to store a complete "snapshot" of all key
instrument settings, and recall this setup at a later time.
The instrument is protected against overload conditions (such as short circuits) by an
automatic control circuit. An internal power supply monitor removes the power to the
output stage for five seconds if an average power overload exists. After that time, the
unit operates normally for one second, and if the overload condition persists, the power
is cut again. This cycle repeats until the overload is removed.
This instrument is intended for use in research, development, test and calibration
laboratories by qualified personnel.