July 16, 2004 6881094C28-D
5-4 Performance Checks: Display Radio Test Mode (Models II and III)
While in RF test mode:
• Each additional press of Side Button 2 advances to the next test channel. (Refer to Table 5-3.)
•Pressing Side Button 1 scrolls through and accesses the test environments shown in
Table 5-4.
NOTE: Transmit into a load when keying a radio under test.
Table 5-3.  Test Frequencies (MHz)
Test 
Channel
VHF
RX
VHF
TX
UHF R1
RX
UHF R1
TX
UHF R2
RX
UHF R2
TX
700–800 
MHz
RX 
700–800 
MHz
TX 
F1 136.075 136.025 380.075 380.025 450.075 450.025 764.0625 764.0125
F2 142.075 142.125 390.075 390.025 460.075 460.025 769.0625 769.0125
F3 154.275 154.225 400.075 400.025 471.075 471.025 775.9375 775.9875
F4 160.175 160.125 411.075 411.025 484.925 484.975 851.0625 794.0125
F5 168.125 168.075 424.975 424.925 485.075 485.025 860.0625 809.0125
F6 173.925 173.975 425.075 425.025 506.075 495.025 869.9375 823.9875
F7 — — 435.075 435.025 506.075 506.025 851.0625 851.0125
F8 — — 445.075 445.025 519.925 519.975 860.0625 860.0125
F9 — — 457.075 457.025 — — 869.9375 869.8875
F10 — — 469.975 469.925 — — — —
Table 5-4.  Test Environments
No. of 
Tones
Display Description Function
1CSQ Carrier 
Squelch
RX: unsquelch if carrier detected
TX: mic audio
3TPL Tone 
Private-Line
RX: unsquelch if carrier and tone (192.8 Hz) 
detected
TX: mic audio + tone (192.8 Hz)
9 SEC Secure** RX: auto-coded clear
TX: with key present—encrypted audio with 
key absent—constant unsquelch
11 AST ASTRO RX: none
TX: 1200 Hz tone ***
12 USQ Carrier
Unsquelch
RX: unsquelch always
TX: mic audio
** On radios equipped with secure option.
***All deviation values are based on deviation tuning of this mode.