Operation Modes; Active Operation; Analog Control Channel Mode (Acch) - Nokia NSW-5 Series Service Manual

PAMS Technical Documentation

Operation Modes

The transceiver has five different operation modes:
– Power off
– Idle
– Active
– Charge
– Local
In the Power off mode only the circuits needed for power up are supplied.
In the Idle mode circuits are powered down and only sleep clock is run-
ning.
In the Active mode all the circuits are supplied with power altough some
parts might be in the idle state part of the time.
The Charge mode is effective in parallel with previous modes. The charge
mode itself consists of two different states, i.e. the charge and the mainte-
nance charge mode.
The Local mode is used for testing and alignment.

Active Operation

The phone has the following Active Operation modes:
– Analog mode, on 800 MHz band
– Digital mode, on 800 MHz band
– Digital mode, on 1900 MHz band
– Out Of Range –mode
If the phone cannot find signal from the base station on any control chan-
nel (analog or digital) it goes into OOR mode for power saving.

Analog Control Channel mode (ACCH)

On analog control channel the phone receives continuous signalling mes-
sages on Forward Control Channel (FOCC) from base station, being
most of the time in IDLE mode. Only the receiver part is on. Occasionally
phone re–scans control channels in order to find the stronger or other-
Issue 1 10/00
– Analog Control Channel
– Analog Voice Channel
– Digital Control Channel
– Digital Traffic Channel
– Digital Control Channel
– Digital Traffic Channel
E Nokia Mobile Phones Ltd.
NSW-5
System Module UT5U
ACCH
AVCH
DCCH
DTCH
DCCH
DTCH
OOR
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