Avtech AVR-3-PW-TEK3-B, Инструкция по эксплуатации

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INTRODUCTION
The AVR-3-PW-TEK3-B series is specifically designed for testing Tektronix current
probes. Two main output channels are provided.
One output provides 10 ns rise time voltage pulses (up to 250V, 250 ns to 250 us),
suitable for testing A6303 or TCP303 probes. A 50Ω termination is provided inside a
supplied output module. A variable current of up to 5 Amperes is defined by the 250
Volt pulse and the 50Ω termination. For other applications, the output pulse may be
connected to a user-supplied 50Ω load, if desired.
The second output is intended for testing lower-current, higher-speed current probes. It
can generate pulse amplitudes up to 50V and 1A, with 0.5 ns rise times. The pulse
width is variable from 50 ns to 200 ns.
The two outputs allow this model to test both high-speed lower-current probes such as
the TCP312 or TCP305, and lower-speed high-current probes such as the A6303 or
TCP303.
An external output module is provided for each output. Replaceable flexible shorting
cables are mounted on these output modules. (The shorting cables are standard RG-
316 coaxial cables.) During tests, the output module are connected to the mainframe by
a 12" / 30 cm length of coaxial cable, and the current probes are clamped around the
shorting cables. The output modules also contain the 50 Ohm termination.
The supplied cables and output modules are designed to preserve the fast rise and falls
times as much as possible, despite the parasitic inductance introduced by the probes
and the unshielded connections (i.e., imperfect transmission lines) required to measure
current flow.
The AVR-3-PW-TEK3-B is optionally available with an additional output module that is
physically suitable for use with the Tektronix CT-1 and CT-2 ultra-fast (i.e., sub-
nanosecond rise time) current probes.
Instruments with the "-P" model suffix can generate positive output voltages (and thus
source current), whereas instruments with the "-N" model suffix can generate negative
voltages (and thus sink current).
The AVR-3-PW-TEK3-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 command can also be used to trigger the instrument.
The AVR-3-PW-TEK3-B features front panel keyboard and adjust knob control of the
output pulse parameters along with a four line by 40 character back-lit 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
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