Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
FRONT PANEL (fig. 4-1) (Cont)
CODE SYNTH Mode
indicators
Six LEDs (red)
b. Off - Turns off signal. When the mode is
DPL or DPL Inv, returning the switch to Off
from Cont produces a 133 Hz tone burst
for a 120 ms duration.
c. Burst - For PL, tone A, and tone B modes the
output is present for as long as the switch Is
held in the burst position. For the A/B mode
the burst position causes a single signaling
sequence to be output. For the DPL and
DPL Inv modes the Burst position causes a
133 Hz tone to be output. For the Tone
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
commands until the switch is returned to the
Off position. This switch is spring loaded to
return to the Off position from the Burst
position.
When illuminated, indicates the selected mode of
the Code Synthesizer.
a. PL/DPL Indicator
PL - Selected Private Line frequency output
to 1 kHz
DPL - Selected Digital Private Line code output
Maximum code number is 777.
b. PL/DPL Inv indicator
PL - Same as above
DPL - Inverted output of selected Digital
Private Line code. Maximum code number is
777.
The Private Line frequency or the Digital Private
Line code is selected from the RF memory display
or entered from the keyboard on the Gen Mon
Mtr display.
c. Tone A indicator
Indicates Tone A selected for output
d. Tone B indicator
Indicates Tone B selected for output
4-7
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