Motorola R-20018 Manual page 22

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Table 4-1. Controls, Indicators, and Connectors (Cont) Table 4-1. Controls, Indicators, and Connectors (Cont)
Item
Description Function
Item Description
Function
b. Pwr Mon - equipment monitors input signals
FRONT PANEL (fig. 4-1) (Cont)
with the input terminated into the internal
power meter. This position must be used for
b. Off - Turns off signal. When the mode is
inputs of 0.2 watts and greater.
DPL or DPL lnv, returning the switch to Off
c. Monitor- equipment monitors input
from Cont produces a 133 Hz tone burst
lor a 120 ms duration.
signals with the input terminated into the
receive mixer. This position is used for
c. Burst - For PL. tone A, and tone B modes the
"off the air" monitoring.
I
output is present lor as long as the switch is
FUNCTION indicators Six LEOs (red) Indicates the mode or type of signal the equip-
I
held in the burst position. For the A/B mode
ment is set up to monitor or generate:
the burst position causes a single signaling
sequence to be output. For the DPL and
a. FM -equipment generates or monitors
DPL lnv modes the Burst position causes a
frequency modulated signals.
133Hz tone to be output. For the Tone
b. CW - equipment generates an unmodulated
RF signal. Monitor CW provides frequency
error measurement only.
Remote mode either the Burst or the Cont
position causes a tone remote access
sequence to be output. The access sequence
leaves tone A at a low level for transmit-type
c. AM -equipment generates or monitors
amplitude modulated signals.
commands until the switch is returned to the
Off position. This switch is spring loaded to
return to the Off position from the Burst
d. SSB/DSBSC - equipment generates a position.
double sideband suppressed carrier signal.
NOTE: The level of the DSBSC signal
CODE SYNTH Mode Six LEOs (red)
When illuminated, indicates the selected mode of
generated is not calibrated, it is for use in
indicators the Code Synthesizer.
relative measurements only. Monitor SSB
mode receives SSB signals with the use of
a. PLIDPL Indicator
PL -Selected Private Line frequency output
the BFO.
to 1 kHz
DPL- Selected Digital Private Line code output
e. SWP 1-10 MHz- equipment generates a Maximum code number is 777.
swept RF signal having a sweep width of 1 b. PL/DPL lnv indicator
to 10 MHz, controlled by the Dispr/Sweep PL - Same as above
control. Selection of Monitor Sweep has no DPL- Inverted output of selected Digital
effect, equipment remains in generate mode. Private Line code. Maximum code number is
777.
f. SWP 0.01-1 MHz- equipment performs as in
e. above except the sweep width limits are
The Private Line frequency or the Digital Private
Line code is selected from the RF memory display
0.01 MHz to 1 MHz.
or entered from the keyboard on the Gen Mon
MODULATION Three position toggle
Controls the Code Synthesizer modulation source.
SWITCH switch
Code Synthesizer mode is shown by the LEOs.
Mtr display.
c. Tone A indicator
Indicates Tone A selected for output
a. Cont - Continuous modulation signal output.
d. Tone B indicator
Indicates Tone B selected for output
4-6
4-7