Avtech AV-1010-C-NCSU Instructions Manual page 10

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AMPLITUDE FINE. The ten turn amplitude vernier provides
continuously variable control of the peak amplitude of
the main output from 0 Volts to 60 Volts.
OFFSET. Ten turn control varies the DC offset from 0 to
+ 30 Volts (to R, > K). Polarity of offset is always
opposite to the pulse polarity. CAUTION The unit may be
damaged if the offset is accepted with a low load
impedance (eg. 50 Ohms).
OUT. BNC connector provides output to load impedance of
50 Ohms or higher.
OVERLOAD. An automatic overload protective circuit
controls the front panel overload light. If the unit is
overloaded (by operating at an exceedingly high duty
cycle or by operating into a short circuit), the
protective circuit will turn the output of the
instrument OFF and turn the indicator light ON. The
light will stay ON (i.e. output OFF) for about 5 seconds
after which the instrument will attempt to turn ON (i.e.
light OFF) for about 1 second. If the overload
condition persists, the instrument will turn OFF again
(i.e. light ON) for another 5 seconds. If the overload
condition has been removed, the instrument will turn on
and resume normal operation. Overload conditions may be
removed by:
1) Reducing PRF (i.e. switch to a lower range)
2) Reducing pulse width (i.e. switch to a lower range)
3) Removing output load short circuit (if any)
4) Reducing the output amplitude (i.e. switch toa
lower range)