Reference
370B User Manual
The Vertical deflection factor of the CRT display is controlled by the VER-
TICAL switch, the MAG control and the Collector Supply POLARITY
switches. The VERT/DIV readout CRT combines the effect of these three
controls to produce the vertical deflection factor.
Under normal operating conditions, with POLARITY set to +
, AC, or
–
and MAG set to OFF, collector current is measured vertically, and the
VERTICAL control determines the vertical sensitivity of the display.
When measuring collector current, the VERTICAL control provides deflection
factors (unmagnified) ranging from 1 mA/division to 2 A/division. The vertical
deflection factor is indicated by the VERT/DIV readout.
When the Collector Supply POLARITY is set to + LEAKAGE or – LEAKAGE,
emitter current is displayed on the vertical axis. Additionally, the vertical
sensitivity increases by 1000 times. (The vertical deflection factor is indicated by
the VERT/DIV readout.) When POLARITY is set to + LEAKAGE or
– LEAKAGE, the output of the Collector Supply is DC voltage , like that
obtained when POLARITY is set to + DC or – DC, rather than a voltage sweep.
When CONFIGURATION is set to BASE COLLECTOR SUPPLY, base current
is displayed on the vertical axis and the VERTICAL control provides deflection
factors (unmagnified) ranging from 1 mA/division to 2 A/division.
When the VERTICAL control is set to STEP GEN, steps indicating the Step
Generator output are displayed vertically. The vertical display shows one step per
division. The amplitude of each step, as shown by the PER STEP readout,
determines the vertical deflection factor.
The vertical sensitivity can be increased by 10 times for any of the previously
mentioned measurements by setting the MAG control to X 10. The magnified
vertical deflection factor is indicated by the VERT/DIV readout.
. The VERT/DIV readout does not indicate deflection factors less than
100 pA/division.
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General