Operating Basics
370B User Manual
2-21
LOOPING COMPENSATION. The LOOPING COMPENSATION control
neutralizes the effects of internal and adapter stray capacitance but does not
compensate for device capacitance.
VARIABLE COLLECTOR SUPPLY. The VARIABLE COLLECTOR SUPPLY
allows variable control of collector supply voltage within range set by MAX
PEAK VOLTS controls. Clockwise (cw) rotation increases the collector supply
output voltage, and ccw rotation decreases it. The control has no stops. The
output voltage is indicated in the % of COLLECTOR PEAK VOLTS area of the
display as a percent of MAX PEAK VOLTS.
. When the 370B is in DC mode, and the Variable Collector Supply is
rotated quickly from 100% to 0%, or the OUTPUT is switched to DISABLED, a
“bounce” effect may be observed. It is normal for the cursor to go to 0, then
jump back to as much as 3 V when the instrument is in the 400 V range, and then
slowly return to 0.
WARNING. A red light indicates that the collector supply is enabled and
dangerous voltage is applied to the collector or base terminals.
LIMITER. The LIMITER Indicates that the automatic protection is operating. The
protection circuit limits the Collector Supply output.
Table 2-5: Collector Supply Polarity Functions
POLARITY Vertical Display
Source
Collector Supply
Output
Number of Steps
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