Motorola GP640 User Manual

3
English
RADIO OVERVIEW
RADIO OVERVIEW
This user guide covers the operation of the
GP640 Portable Radio.
Please read pages 27 to 29 before using this radio
OPERATION AND CONTROL FUNCTIONS
Radio Controls
The numbers below refer to the illustrations on
the inside front cover.
1. Rotary Knob
Used as a multi-function scroll key and as a
channel selector in Conventional mode.
2. On-Off / Volume Knob
Used to turn the radio on or off, and to adjust
the radio’s volume.
3. Clear Button (Side Button 1)
Used to cancel a call, clear down at the end of
a call or Carrier Monitor (Conventional mode).
4. Push to Talk Button (PTT)
Press and hold down this button to talk, release
it to listen.
5. Side Button 2
Personality button, otherwise programmable.
6. Side Button 3 (programmable)
7. Top Button (programmable)
Recommended as Emergency button.
8. LED Indicator
Green: Flashes to indicate NO SERVICE.
Red: On when radio is transmitting.
Red Flashing: When transmitting - battery low.
Green:Ontoindicatemonitormodeactive
(Conventional Mode).
Red Flashing: When receiving - channel busy
(Conventional Mode).
9. Microphone
10. Antenna
11. Accessory Connector
Connects headsets, remote speaker/micro-
phones and other accessories. Replace
attached dust cap when not in use.

Motorola GP640 Specifications

Power

power supply	7.5 V
power 136-174	1-5W
power 403-470	1-4W
power 450-527	1-4W

Battery

average battery life with standard high capacity NiMH battery low power	11 hours
average battery life with standard high capacity NiMH battery high power	8 hours
average battery life with ultra high capacity NiMH battery low power	14 hours
average battery life with ultra high capacity NiMH battery high power	11 hours
average battery life with NiCD battery low power	12 hours
average battery life with NiCD battery high power	9 hours
average battery life with Li-lon battery low power	11 hours
average battery life with Li-lon battery high power	8 hours

Operating Environment

operating temperature	-20°C to +55°C
frequency stability	±2.5 ppm (-25°C to +55°C, +25°Ref.)
sealing	MIL STD 810 C/D/E and IP54

Transmitter

frequencies full bandsplit VHF	136-174 MHz
frequencies full bandsplit UHF 1	403-470 MHz
frequencies full bandsplit UHF 2	450-527 MHz
channel spacing	12.5/20/25 kHz
modulation limiting	±2.5 @ 12.5 kHz, ±4.0 @ 20 kHz, ±5.0 @ 25 kHz
FM hum & noise	-40 dB typical

Receiver

sensitivity (12 dB SINAD) EIA	.25 µV typical
sensitivity (20 dB SINAD) EN	.50 µV typical
intermodulation EIA	70 dB
adjacent channel selectivity	60 dB @ 12.5 kHz, 70 dB @ 20/25 kHz
spurious rejection	70 dB
rated audio	0.5W

Weight and Dimensions

dimensions with standard high capacity NiMH battery	137 x 57.5 x 37.5 mm
dimensions with ultra high capacity NiMH battery	137 x 57.5 x 40.0 mm
dimensions with NiCD battery	137 x 57.5 x 40.0 mm
dimensions with Li-lon battery	137 x 57.5 x 33.0 mm
weight with standard high capacity NiMH battery	420 gm
weight with ultra high capacity NiMH battery	500 gm
weight with NiCD battery	450 gm
weight with Li-lon battery	350 gm