Motorola R-2001A, Service Manual

Page: 31 / 220

Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
FUNCTION indicators Six LEDs (red)
MODULATION
SWITCH Three position'
switch
b. Pwr Mon - equipment monitors input signals
with the input terminated into the internal
power meter. This position must be used for
inputs of 0.2 watts and greater.
c. Monitor - equipment monitors input
signals with the input terminated into the
receive mixer. This position is used for
"off the air" monitoring.
Indicates the mode or type of signal the equip-
ment is set up to monitor or generate:
a. FM - equipment generates or monitors
frequency modulated signals.
b. CW - equipment generates an unmodulated
RF signal. Monitor CW provides frequency
error measurement only.
c. AM - equipment generates or monitors
amplitude modulated signals.
d. SSB/DSBSC - equipment generates a
double sideband suppressed carrier signal.
NOTE: The level of the DSBSC signal
generated is not calibrated, it is for use in
relative measurements only. Monitor SSB
mode receives SSB signals with the use of
the BFO.
e. SWP 1-10 MHz - equipment generates a
swept RF signal having a sweep width of 1
to 10 MHz, controlled by the Dispr/Sweep
control. Selection of Monitor Sweep has no
effect, equipment remains in generate mode.
f. SWP 0.01-1 MHz - equipment performs as in
e. above except the sweep width limits are
0.01 MHz to 1 MHz.
Controls the Code Synthesizer modulation source.
Code Synthesizer mode is shown by the LEDs.
a. Cont - Continuous modulation signal output.
4-6