122 Servicing Procedure TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Replacement of
Board or Assembly
In some cases the repair of the radio will require the replacement of a
complete control-head board or a complete main-board assembly. In
these cases level-1 service centres should return the faulty board or
assembly to the nearest ASC, and level-2 service centres should return
the board or assembly to the ISC. Supply details of the fault and, if
applicable, the attempted repair.
New Programming File If the radio had to be reprogrammed with a default programming file, the
following additional actions are required: If the radio is to be returned
direct to a Customer who has no
programming facilities, the appropriate
programming file needs to be obtained and uploaded (or the data
obtained to create the file). If the radio is to be returned to a Dealer or
direct to a Customer who does have programming facilities, the Dealer
or Customer respectively need to be informed so that they can program
the radio appropriately.
Table 5.1 Final tests of transmitter function
Test Limits
Error in transmit frequency +100 Hz to –100 Hz
Transmit power:
• High
• Medium
• Low
• Very low
23.2 W to 29.2 W
11.1 W to 14.0 W
4.6 W to 5.8 W
0.9 W to 1.2 W
Current at high power:
• B1-band radios
• D1-band radios
• H5-band radios
• H6-band radios
< 5.5 A
< 5.5 A
< 6.5 A
< 6.5 A
Peak deviation (sweep tone of 300 Hz to 3 kHz):
• Narrow-band
• Medium-band
• Wide-band
<
2.5 kHz
< 4.0 kHz
< 5.0 kHz
Distortion:
• 1 kHz at 1.5 kHz deviation (narrow-band)
• 1 kHz at 3.0 kHz deviation (wide-band)
< 3%
< 3%
CTCSS (continuous-tone-controlled subaudible signalling) deviation:
• Narrow-band
• Medium-band
• Wide-band
250 to 350 Hz
500 to 560 Hz
580 to 680 Hz
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