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EXTERNAL
TRIGGER
INPUT
Period
Generator
Q 1 15, Q125,
Q 1 34
CAUTION
Do not connect test probe ground clips to the com
mon point of the circuit board while the AMPLI
TUDE switch is in either of the negative positions.
The best procedure is to always connect the test
probe ground clip to the main chassis and leave
the AMPLITUDE switch in the positive output posi
tions.
The VARIABLE control associated with the AMPLITUDE
®L
teering
Circuit
T131, D136,
Q224
D161, Q 1 64
Q 1 74
Fig. 3-2. Type 114 block configuration for square-wave output.
Circuit Description — Type 114
Width > Period
Circuit
Q 1 45, Q 1 55
Output Amplifier
Trigger Output
Width Bistable
Q2 0 5, Q215
switch
provides continuously variable voltage amplitude
within the ranges of the AMPLITUDE switch.
Power Supply
The power supply consists of a regulated 25-volt supply
and an unregulated 35-volt supply. The 25-volt supply and
a 10-volt supply are stacked to obtain the 35-volt supply.
A rear-panel switch is provided to change transformer pri
mary connections when switching from 115- to 230-volt
operation.
OUTPUT
Q244,
Q254, Q264
TRIGGER OUTPUT
Circuit
Q234
3-3
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