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the radio does self-test and frequency
preset initiation.
1. COMM key (or DSPL SEL switch)  Press.
COMM page (fig. 3-7) displays.
2. L-1/L-5  Press to select FM-1 or FM-2 and
frequency list (fig. 3-8).
3. R-5  Press to select FM-1 or FM-2 Radio
Control page (fig. 3-14).
PULL
MAN
PULL
BKUP
BRT
C
ONT
VSD HSD MMS COMM
FM-1
RETRAN
6 040.750
ATIS
EMER T/R
SC FH
PWR LO
KYBD
TOD 21 23:59
406075-1414-1
J0546
ON SQL
+10 OSET
4. SC/FH key  Press to select single channel Figure 3-14. (CDS3) FM-1  FM-2 Radio Control
 SC. Page (SC Mode)
3-26
TM 1-1520-248-10
5. EMER T/R key  Toggles between current
+5, -5, +10, -10. Offsets are in kHz. For frequency and emergency frequency 40.50
example, 50.400 would become 50.405 if +5 MHz.
were selected.
6. PWR key  Press to select IFM power level:
3-25. (CDS4) AN/ARC-201D SINCGARS NORM, LO, MED, HI.
SINGLE CHANNEL OPERATION. 7. KYBD key  Press to activate MFK for
Operation of the AN/ARC-201 VHF FM radio is entering radio channels from frequency list or
controlled from the FM-1  FM-2 Radio Control page manual frequencies.
(Fig. 3-15). The area at the top of the control page
displays radio status information on five lines. The first 8. TOD key  L-5 is used to display or change
line provides the title of the page, FM-1 or FM-2. The the current TOD in the radio. Pressing L-5 will
second line indicates radio RETRAN status. The line is display the TOD along with a cursor.
blank if RETRAN status is OFF. RETRAN will be
displayed if RETRAN status is ON. The third line a. To retain the current/displayed TOD, press
displays the current channel number and frequency. ENTER on the MFK. The TOD remains
The fourth line displays the channel identifier for that displayed until the FM-1 Control Page is
channel. The fifth line consists of the text BUSY if the exited or for 30 seconds.
radio is busy or displays one of the following special
display data:
b. To enter a new TOD, enter days, hours, and
BLANK (No Text) L8
minutes in the format DDHHMM (DD=days -
CUE FILL CMPLT
01 to 31 inclusive, HH=hours - 00 to 23
BIT GO FILLING
inclusive, and MM=minutes - 00 to 59
CLR GO ERROR
inclusive). CDS will supply the spaces and
STO GO NO TOD
colons (:); however, operator must enter all
SEND GO NO FILL
leading and trailing zeros. Press ENTER on
LATE NET BAD FILL
MFK after the data is entered. The CDS
LSET MEM NO KEYS
HSET MEM NO KEY
L7/L8 REC ERR
L7 SEVERE
NOTE
After power is applied to the SINCGARS
AN/ARC-201D radio, line address keys are
unusable for approximately 1 minute while
the radio does self-test and frequency
preset initiation.
1. COMM key (or DSPL SEL switch)  Press.
COMM page (fig. 3-7) displays.
2. L-1/L-5  Press to select FM-1 or FM-2 and
frequency list (fig. 3-8).
3. R-5  Press to select FM-1 or FM-2 Radio
Control page (fig. 3-15).
4. SC/FH/FH-M key  Press to select single
channel  SC.
PULL
MAN
PULL
BKUP
BRT
C
ONT
VSD HSD MMS COMM
EMER T/R
FM-1
SC FH FH-M
PWR NORM
DATA MODE
SDM
(TAC, FS)
DATA RATE
1200
(TAC, TYPICAL)
KYBD
TOD 21 23:59
+10 OSET
ON SQL
406075-1414-1
J3164
RETRAN
17 040.000
110CAV
BUSY
Figure 3-15. (CDS4) FM-1  FM-2 Radio Control
Page (SC Mode)
3-27
TM 1-1520-248-10
sends the data to the radio and removes the a. Transmission Security (TSEC) variable. This
time from the display. Entering all zeros v a r i a b l e d e t e r m i n e s s e q u e n c e o f
causes the radio to read time from the GPS. frequencies. This variable can only be
To display the new TOD, press L-5 again. loaded via the fill connector for the radio set
in the aft electrical compartment and will not
9. SQL key  Toggles squelch between on or be transmitted with the Electronic Remote
off. Fill (ERF).
10. OSET key  Used to select a frequency b. FH s y n c t i m e , t o s y n c h r o n i z e t h e
offset for current preset or manual frequency. transmitting and receiving radios. This time
OSET may be required when dissimilar radio is established by the master net control
sets are being used and local interference is station and is received with the ERF. When
encountered. OSET is not normally used and aircraft power is turned off, the RT clock is
　
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