Motorola SYMBOL MT2000 Series, Руководство по обслуживанию

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8
with Option•Mate interface plug enabled
through the HT 1000 RSS, TX and RX audio
will be muted. Do not test Analog Voice
Security (AVS) installed radios in the TEST
MODE.
When the HT 1000/JT 1000 radio is operating in its normal
environment, the radio's microcontroller controls the RF channel
selection, transmitter key-up, and receiver muting. However, when the
unit is on the bench for testing, alignment, or repair, it is removed
from its normal environment. It cannot receive commands from its
system and, therefore, the internal microcontroller will not key the
transmitter nor unmute the receiver. This prevents the use of normal
tune-up procedures. To solve this problem a special routine, called
TEST MODE or “air test,” has been incorporated in the radio.
To enter test mode:
1. Turn the radio on.
2. Within ten seconds after the self test is complete, press the
monitor button (side button 3, SB3) five times in succession. After
the fifth press:
a. (HT 1000 radios), a tone is emitted to indicate that the rf test
mode has been entered.
b. (JT 1000 radios), the display will show the firmware version of
the microprocessor for two seconds, emit a tone, then display
TEST MODE).
3. Each additional press of SB3 will advance to the next test channel.
(refer to Table 6), and a corresponding set of tones will indicate the
channel.
4. Pressing SB2 will scroll through and access test environments as
shown in Table 5.
NOTE: Transmit into a load when keying a radio
under test.
To exit test mode, turn the radio off then back on.
Table 5 Test Environments, HT 1000/JT 1000 Radios
NO. OF
BEEPS
DESCRIPTION FUNCTION
1 Carrier Squelch RX: if carrier detected
TX: mic audio
3 Tone Private-Line RX: unsquelch if carrier and tone
(192.8Hz) detected
TX: mic audio + tone (192.8Hz)
4 Digital
Private-Line RX: unsquelch if carrier and digital code
(131) detected
TX: mic audio + digital code (131)
detected