Motorola EP450 service manual No. Description Function Beeps, No. of BKC

Performance Checks: RF Test Mode 4-3

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 8. 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 Table 4-3.

4.Turn the channel selector knob to change the test channel for that environment as shown in Table 4-4.

5.Press the PTT on a test channel to cause the radio to transmit at the test frequency for the channel. Table 4-2. Test Environments

No. of	Description	Function
Beeps
1	Carrier Squelch	RX: unsquelch if carrier detected
GKC*		TX: mic audio
1	Tone Private-Line	RX: unsquelch if carrier and tone (192.8 Hz) detected
BKC*		TX: mic audio + tone (192.8 Hz)
2	Digital Private-Line	RX: unsquelch if carrier and digital code (131) detected
BKC		TX: mic audio + digital code (131)
3	Dual-Tone Multiple	RX: unsquelch if carrier detected
BKC	Frequency	TX: selected DTMF tone pair
5	Unsquelch Open	RX: constant unsquelch
BKC		TX: mic audio
9	High-Speed Signal-	RX: unsquelch if carrier detected
BKC	ing	TX: 1500 Hz tone

*“BKC” means Bad Key Chirp (low-pitched tone), “GKC” means Good Key Chirp (high-pitched only).

Table 4-3. Test Channel Spacing

No. of BKC Channel Spacing

125 kHz

212.5 kHz

320 kHz

HKLN4215A December 3, 2003