GENERAL RADIO COMPANY 1263-8 Operating Instructions Manual page 7

GENERAL RADIO COMPANY
internal 1-kc off-on modulation is provided for use with a sensitive de-
tector such as an rf demodulating rectifier followed by a 1-kc selective
amplifier.
The Type 1263-B also supplies heater voltage to the oscillator.
Output voltage and current specifications are: plate supply, 0 to 300 volts
at 30 rna; heater supply, 6 volts at
0. 5
amp.
1.2 DESCRIPTION.
1.2. 1 CONTROLS.
The following controls are on the Type 1263-B Am-
plitude-Regulating Power Supply:
Name
POWER
ZERO
CAL
OUTPUT
VOLTAGE
ADJ MOD
FREQ
INCREASE
DUTY
RATIO
Description Positions
Two-position POWER, OFF
toggle-switch
with pilot
light
Two-position
toggle-switch
Five-position
selector
switch
Recessed
thumb-set
control
Recessed
thumb-set
control
Continuous
rotary control
Continuous
rotary control
Recessed
thumb-set
control
CW-1 kc
rLJ
MOD
ZERO, CHECK
CAL, OPERATE
UN REG
2
Function
Turns power on or off.
Selects cw or 1-kc square-
wave modulation.
Permits output voltmeter to
be checked and calibrated
with output rectifier in use,
without disturbing any con-
nections to oscillator, and
switches off amplitude con-
trol.
Output-voltmeter zero ad-
justment.
Output-voltmeter calibra-
tion adjustment.
Sets output level.
Adjusts modulating fre-
quency over narrow range.
Permits symmetrical square-
wave modulation even with
appreciable starting delay in
oscillator.