NOTE
To cue a SINCGARS radio which is in the frequency hopping mode, the pilot must keep the radio keyed for at least 4 seconds while tuned to the cue frequency while in single channel mode. This is needed because
of the time factor that the radio monitors the cue channel which is once every 4 seconds.
(1) Cue Operation. This mode allows an pilot to prompt another SINCGARS radio who is working in the frequency hopping mode to come out of the frequency hop-ping mode and into single channel mode. When this is done, a 600-Hz tone is heard over the ICS system. When the member or master comes out of the frequency hopping mode to the single channel mode, they must be tuned to the cue band.
NOTE
If TSK do not match or are not loaded, cold hop operation will not be possible.
Due to the limited security of the cold chan-nel of frequency hopping mode, it is recom-mended that only one hopset and lockout be sent in this mode.
(2)
Cold Start Operation. Use cold start when radios in the net do not have matching hopset/lockout sets. Commu-nication is established using the cold start frequency hop-ping set, which has only one frequency. When communica-tion is established, the master station transmits a hopset/ lockout set of choice to the net stations, who receive it, store and use them in the normal frequency hopping mode.

d.
Homing (HOM)(COM 1 only).

3.6.4 Starting Procedure.
NOTE
Initial battery power on and/or initial APU ac power on may cause Com 1 AN/ARC-201togo to CT mode -Via CDU Com 1 soft key select PT mode.
The radio is powered up when power is applied to heli-copter’s systems. As it will initialize faster than the GPS, updating its internal clock to GPS is the only start up pro-cedure advisable.
3.6.4.1 Single Channel (SC) Mode.
1.  
COM .xed function key -Press, to access COM SUM screen.

2.
SK 1 or SK 4 soft key -Press, to edit frequency or preset of desired radio (COM 1 or COM 4).

NOTE

If the radio is already in FM-SC mode, its preset and/or frequency desired is known, it may be edited on the COM SUM screen, and steps 4 thru 7 will be unnecessary. To edit preset or frequency, ensure that preset or frequency has edit box around it. Enter new number in scratchpad, then ENT -Press.
3.  
BAND soft key -Press.

4.  
FM-SC soft key -Press.

5.  
SETTINGS soft key -Press, to access Settings screen.

6.  
TUNE soft key -Press, if desired to change frequency. Enter new frequency in scratchpad. ENT .xed function key -Press to enter scratch-pad frequency.

7.
ICS transmitter selector -Position 1 (COM 1), or position 4 (COM 4).

8.
Radio push-to-talk switch  -Press to talk; re-lease to listen.

3.6.4.2 Edit or Make Frequency Into PRESET.
1.  
DAT .xed function key -Press, to access MIS-SION DATA screen, then COMM soft key, to access COM PRESET screen.

2.  
FM-SC,or ECCM-FH soft key -Press, to ac-cess preset screen.

3.
Use  PREV/NEXT rocker switch to display preset to change. Select .elds to edit with soft key, enter new values in scratchpad, and press ENT to change displayed values.

3.6.4.3 Frequency Hopping (FH or FH-M) Mode.
1.  COM .xed function key -Press, to access COM -SUM screen.
NOTE

If the radio is already in FREQ-HOP mode, and its desired preset or channel is known, it may be edited on the COM SUM screen, and steps 4 thru 7 will be unnecessary.
2.
SK 1 or SK 4 soft key -Press, to edit preset of desired radio (COM 1 or COM 4). To edit pre-set or channel, ensure that preset or channel has edit box around it. Enter new number in scratchpad, then ENT -Press.

3.  
BAND soft key -Press.

4.  
FREQ HOP soft key -Press. Screen returns to COM SUM screen.
　
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