Motorola CP140 Basic Service Manual page 33

Performance Checks: RF Test Mode
To enter test mode:
1. Turn the radio on.
Within ten seconds after the self test is complete (self test tone is heard), press SB2 (Side Button 2 in
Figure 4-2) five times in succession. If the self test complete tone is not heard, see Error Codes
information in Chapter 9. Entry into the test mode is indicated by a positive indicator tone followed by
a good key chirp (GKC)Upon entering test mode, the radio is in the carrier squelch mode.
2. Press SB1 (Side Button 1) and scroll through and access test environments as shown in
Table 4-2.
3. Press SB2 and scroll through the channel spacing available as shown in
4. Turn the channel selector knob to change the test channel for that environment as shown in
5. Press the PTT on a test channel to cause the radio to transmit at the test frequency for the channel.
No. of
Beeps
1 Carrier Squelch
GKC*
1 Tone Private-Line
BKC*
2 Digital Private-Line
BKC
3 Dual-Tone Multiple
BKC Frequency
5 Unsquelch Open
BKC
9 High-Speed Signal-
BKC ing
* "BKC" means Bad Key Chirp (low-pitched tone), "GKC" means Good Key Chirp (high-pitched
only).
Table 4-2. Test Environments
Description
RX: unsquelch if carrier detected
TX: mic audio
RX: unsquelch if carrier and tone (192.8 Hz) detected
TX: mic audio + tone (192.8 Hz)
RX: unsquelch if carrier and digital code (131) detected
TX: mic audio + digital code (131)
RX: unsquelch if carrier detected
TX: selected DTMF tone pair
RX: constant unsquelch
TX: mic audio
RX: unsquelch if carrrier detected
TX: 1500 Hz tone
Table 4-3. Test Channel Spacing
No. of BKC
1
2
3
Function
Channel Spacing
25 kHz
12.5 kHz
20 kHz
4-3
Table 4-3.
Table 4-4.