Rf Test Mode (Mdc Radios) - Motorola Commercial Series Basic Service Manual

RF Test Mode (MDC Radios)

4.0 RF Test Mode (MDC Radios)
When the radio is operating in its normal environment, it is not possible to test all individual aspects
of the transmitter and receiver performance. Therefore a special "test mode" is used to allow the
service technician to perform certain functional tests on the product. A control head fuctional test
mode is also available.
To enter test mode (display radios):
1. Turn the radio on.
2. Within ten seconds after the self test is complete, press button P2, five times in succession.
3. Channel number appears in the display. The radio is on channel XX*, carrier squelch mode,
25 kHz channel spacing.
4. Each additional press of P2 scrolls through to the next channel spacing and a corresponding
set of tones are sounded.
5. Pressing P1 scrolls through and accesses test environments as shown in Table 3-5.
6. Pressing P2 for three seconds switches the radio to the control head test mode and zero
appears on the display.
7. Pressing P1 causes the radio to display the channel number "1". Another P1 press causes the
radio to display the next channel "2", and so on until channel "9".
8. Pressing P1 at the end of the LCD test activates the 'LED Test'. The next P1 press turns the
LEDs and dot On/Off.
9. Pressing P1 at the end of the LED test activates the button test. Pressing any button (except
P1) or any keypad button during the LCD test or Icon test immediately activates this test.
10. Pressing P2 for 3 seconds in the control head test mode causes the radio to return to the RF
test mode.
*XX = channel number (01 - 09)
No. of
Beeps
1 Carrier Squelch
1
2
3
9
5
11
Table 3-5 Test Environments
Description
Tone
Private-Line
Digital RX: unsquelch if carrier and digital code (131) detected
Private-Line
Dual-Tone
multiple
frequency
MDC1200
HSS
Unsquelch
Open
CMP
RX: if carrier detected
TX: mic audio
RX: unsquelch if carrier and tone (192.8Hz) detected
TX: mic audio + tone (192.8Hz)
TX: mic audio + digital code (131)
RX: unsquelch if carrier detected
TX: selected DTMF tone pair
RX: unsquelch if carrier detected
TX: 1500Hz tone
RX: constant unsquelch
TX: mic audio
RX: if carrier detected
TX: mic audio
Function
3-5