Motorola GP series Service Manual

Voice Storage (GP1280 Only) 2-13
Audio routing to the Voice Storage circuitry during receive message recording, message playback,
personal memo recording and voice prompt transmit over the air are as follows:
Received Message Recording
The receive audio is tapped from the Rx_Aud_Rtn pin of the ASFIC_CMP during receive mode.
Message Playback
Message playback is via the FLAT_RX_SND pin of ASFIC_CMP. In the ASFIC_CMP, the signal is
routed via the Side-Tone path to the Receive path where playback audio is routed to the speaker.
Personal Memo Recording
In this mode, voice is pick-up at the Mic. and via the Side-Tone path will be directed to the
Rx_Aud_Rtn pin, which is then routed to the voice recording chip.
Voice Prompt transmit over the air
A personal voice prompt or Out-Of-Office Message which is stored in the IC can be transmitted over
the air through mic path in the ASFIC_CMP to the calling party. This feature is similar to the
Telephone Answering Machine feature when the person called is not available to attend the call.

Motorola GP series Specifications

General

Operating Temperature	-30°C to +60°C
Frequency Range	136-174 MHz
Number of Channels	16
Channel Spacing	12.5 kHz / 25 kHz
Battery Life	8 hours (with standard battery)
Operating Voltage	7.5V DC
Ingress Protection	IP54
MIL-STD	810 C, D, E, F