Nokia 3105 Servicehandbuch

CCS Technical Documentation

System Module

RH-48

Issue 1 11/2003      Confidential         ©

2003 Nokia Corporation

Page 3

The RH-48 is available as a CDMA single-band engine (800 MHz CDMA).

There are several different operational modes: Modes have different states controlled by 
the cellular SW. Some examples are:  Idle State (on ACCH), Camping (on DCCH), Scan-
ning, Conversation, No Service Power Save (NSPS) previously OOR = Out of Range.

In the 

power-off mode, only the circuits needed for power-up are supplied.

In the 

idle mode, circuits are powered down and only the sleep clock is running.

In the 

active mode, all the circuits are supplied with power, although some parts might 

be in idle state part of the time.

The 

charge mode is effective in parallel with all previous modes. The charge mode itself 

consists of two different states, i.e. the fast charge and the maintenance mode.

The 

local mode is used for alignment and testing.

The core part of the RH-48 baseband module consists of two ASICs — UEM and UPP — 
and combo memory. The following sections describe these parts.