Avtech AVR-E3A-B, Instructions Manual

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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 reading this instruction manual
thoroughly. Then read the “Local Control” section of the “Programming Manual for -B
Instruments” thoroughly. The “Local Control” section describes the front panel controls
used in this operational check - in particular, the MOVE, CHANGE, and ADJUST
controls.
A 50 Ohm load is required for proper operation. The output stage may be damaged if
the output is not terminated into a 50Ω load.
The AVR-E3A-B output may be observed using either a high-speed sampling
oscilloscope, or a slower real-time oscilloscope. To accurately observe these rising and
falling edges, a sampling oscilloscope with a bandwidth of 2 GHz is required. However,
if the rising and falling edges do not need to be accurately observed, it may be more
convenient to use a real-time oscilloscope. The two basic test arrangements are
outlined in the figures below:
BASIC TEST ARRANGEMENT, WITH A SAMPLING OSCILLOSCOPE
24
AVTECH
PULSER
MAIN OUTPUT
CONNECTOR
SYNC
CONNECTOR
AC
POWER
ALL CABLES: 50 OHM COAXIAL
SAMPLING
OSCILLOSCOPE
BW > 2 GHz
50 OHM INPUT
TRIG
CONNECTOR
60 dB
ATTENUATOR