IFR FM/AM-1200A Operation Manual page 33

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ITEM NAME DESCRIPTION
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20. SCOPE/DVM Connector
05ci11oscope-or-oVM external input.
[CAUTION\
DO NOT APPLY MORE THAN 100 VDC, 100 VRMS OR A
COMBINATION OF 50 VDC AND 50 VRMS TO THIS
CONNECTOR.
21. AC/GND/DC Switch
Allows-seleCtion of AC or DC coupling of oscilloscope external
i n put •
22. PWR/OFF/BATT Switch
2 3.
2 4.
3-6
04
Applies/interrupts-power to FM/AM-1200S/A as follows:
"PWR" position - FM/AM-1200S/A is powered by external AC or DC
power source.
''OFF" position - FM/AM-1200S/A is "OFF''.
"BATT" po s i t i on FM/AM-1200S/A is powered by internal battery
(This is a momentary spring-loaded switch to the
"0 F F" position ) .
!NOTE\
Internal FM/AM-1200S/A battery is continuously
charged when external AC power or external DC
power, ABOVE 15 VDC, is connected to set,
regardless of PWR/OFF/BATT Switch (22) position.
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Divides vertical attenuator rate by a factor of from 1 to 10. In
the ''CAL'' position (fully cw), the factor is 1 and the attenuator
rate is as selected by the VERTICAL Attenuator Selector Control
( 2 4 ) • In the f u l l y c c w po s i t i on , the factor i s 1 0. In any i n t e r-
mediate position, the factor is between 1 and 1D.
kHz/%x10 - Allows selection of internal demod audio
signal.
V/Div - Allows selection of Scope/DVM Connector (20)
inputs.
RESID - Displays residual distortion when MODULATION
Meter Control (4) is positioned to "SINAD" or
"DIST".