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Service Manual
cessful completion of either steps 5 or 7, the
telephone scans a set of paging channels,
tunes to the strongest, and attempts to de-
code the overhead message train. The pro-
cedure is exactly equivalent to that followed
for the access (control) channel. Also at this
point, in a few larger systems, the telephone
is commanded to identity itself (transmit) and
thereby indicate its location in the system.
This is called Autonomous System Registra-
tion and, like paging channels, is used to im-
prove paging efficiency.
Figure 6. Going into Serivce
1. Power Up / Self Test
Turn on No Svc Indicator
2. Scan Preferred
System (A or B)
3. Scan all 21
Control Channels
4. Tune to Strongest
Control Channel
5.
Receive
No
Overhead
Info
?
Yes
8.
No
SID matches
Home SID
?
Yes
Note: In order to turn off
the NoSvc light, the
overhead message stream
must have been decoded.
*
In those telephones with Motorola Enhanced Scan, more than two control channels are sampled
before proceeding to step 12.
©1999 Motorola, Inc.
If the system employs Narrow AMPS, part
of the overhead message stream is used to
ask the for activity on one of the secondary
or "digital" control channels, whereas a
CDMA telephone will look for pilot signals.
If digital signaling is not present, and if the
telephone is capable of dual mode operation,
it will default to AMPS mode.
Going Into Service
With a Cellular Telephone
6. Tune to 2nd
Strongest Channel
Yes
Note: In order to turn on the
Roam light, the SID in the
overhead message stream must
NOT match the SID
programmed into the telephone.
9. Turn on
Roam Indicator
10. Turn Off
NoSvc Indicator
11. Idle [Rescan
after 5 minutes.]
Cellular Overview
Analog Cellular
*
No
12. Turn On
NoSvc Indicator
13. Switch to
Non-Preferred System
9
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