5.  
FH-SETUP soft key -Press.

6.
Select hopset and lockout set channels desired with SK 3 and SK 4. Return to COM SUM screen by RTN -Press.

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.

3.6.4.4 Transfer Hopset/Lockout Set (Cold Start).
1.  
COM .xed function key -Press, to access COM -SUM screen. Make sure the edit box is by the COM 1 or 4 radio.

2.  
BAND soft key -Press.

3.  
COLD STRT MASTER soft key -Press. Screen will revert to COM -SUM screen, with COLD START frequency and channel dis-played. Establish communication with the rest of the net, arrange to transfer hopset/lockout sets. From SETTINGS screen, FH -SETUP -Press.

4.
Select the hopset to download with SK 3 and SK 4. LD H/N soft key -Press, to enter hopset into memory.

5.  
ERF-SND soft key -Press, to send .

6.
Select the lockout set to download with SK 3 and SK 4. LD LS soft key -Press, to enter lockout set into memory.

7.  
ERF-SND soft key -Press, to send.

8.
As desired, change band FREQ -HOP , chan-nel to the hopset and lockout set transmitted,

and establish normal frequency hopping com-munications (Refer to paragraph 3.6.4.3).

3.6.4.5 Receive Hopset/Lockout Set (Cold Start).
1.  
COM .xed function key -Press, to access COM -SUM screen. Make sure the edit box is by the COM 1 or 4 radio.

2.  
BAND soft key -Press.

3.  
COLD STRT soft key -Press. Screen will re-vert to COM -SUM screen, with COLD START frequency and channel displayed. Es-tablish communication with the master station, arrange to receive hopset/lockout sets. From SETTINGS screen, FH -SETUP -Press.

4.
When a hopset/lockout set is received, a tone will be heard in the headset. At the tone, STO soft key -Press, to enter hopset/lockout set into memory.

5.
As desired, change band FREQ -HOP , chan-nel to the hopset and lockout set transmitted, and establish normal frequency hopping com-munications (Refer to paragraph 3.6.4.3).

3.6.4.6 Homing (HOM) Mode (FM No. 1 only).
1.
Using COM 1, establish single channel (FM-SC) communication with the station to home on (Refer to paragraph 3.6.4.1)

2.
On COM 1 SETTING screen, RCVR soft key -Press, until HOME is displayed.

3.
On CIS mode select panel, NAV button -Press.

4.
On HSI/VSI mode select panel,  FM HOME button -Press.

5.
Observe homing indicators on vertical situation indicator (VSI) (Figure 3-28). These are:

a.  
FM navigation (NAV) .ag will move from view, and will come into view if the re-ceived signal is too weak.

b.
A steering (course indicator) pointer moves either left or right about 5° to indicate any deviation from the course to the transmit-ting station.

c.  
Station passage will be indicated by course deviation change and CIS MODE SEL

NAV switch light going out and HDG switch light going on.
3.7 UHF RADIO, AN/ARC-164(V) (COM 2).
Receiver-Transmitter Radio RT-1167C/ARC-164(V) is an airborne, ultra-high frequency (UHF), AM and FM, radio transmitting-receiving set. It contains a multi channel, electronically tunable main transmitter and receiver, and a .xed-tuned guard receiver. The main transceiver operates on any one of 7,000 channels, spaced in 0.025 MHz units in the 225.000 to 399.975 MHz UHF military band. The guard receiver is tunable in the 238.000 to 248.000 MHz fre-quency range with crystal replacement and realignment (usually 243.000 MHz). The radio set is primarily used for voice communications. HAVE QUICK is an antijamming mode which uses a frequency hopping scheme to change channels many times per second. Because the HQ mode depends on a precise time-of-day, both HQ radios must have synchronized clocks. The UHF radio is referred to as COM 2, corresponding to its position on the ICS mode select switch.
　
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