Motorola M3097 Service Manual download pdf (Page 20)

Cellular OverviewService 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.

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.

Figure 6. Going into Serivce

Analog Cellular

Yes

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

Receive

Overhead

Info

SID matches

Home SID

10. Turn Off

NoSvc Indicator

9. Turn on

Roam Indicator

6. Tune to 2nd

Strongest Channel

Receive

Overhead

Info

12. Turn On

NoSvc Indicator

13. Switch to

Non-Preferred System

11. Idle [Rescan

after 5 minutes.]

No*

Yes

Going Into Service

With a Cellular Telephone

* In those telephones with Motorola Enhanced Scan, more than two control channels are sampled

before proceeding to step 12.

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.

Note: In order to turn off

the NoSvc light, the

overhead message stream

must have been decoded.

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