Motorola GP644 Specifications Download Page 2

Specification Sheet

Power Supply 

 

Rechargeable battery 7.5V

Dimensions H x W x D (mm) with:  

 

Height excluding knobs 

Li-Ion battery 

 

101.5 x 55.5 x 30.5 

High capacity Li-Ion battery 

 

101.5 x 55.5 x 35.5

Weight (gm) with: 

 

  

Li-Ion battery 

 

250 

High capacity Li-Ion battery 

 

270

Average battery life @ 5/5/90 Cycle with: 

Low Power 

High Power 

Li-Ion battery 

 

>9 hours 

>7 hours 

High capacity Li-Ion battery 

 

>13 hours 

>10 hours

Sealing:  

 

Withstands rain testing per MIL STD 810 and IP54

Shock and Vibration: 

 

 Protection provided via impact resistant housing 
exceeding MIL STD 810 and TIA/EIA 603

Dust and Humidity: 

 

 Protection provided via environment resistant  
housing exceeding MIL STD 810 and TIA/EIA 603

Operating temperature: 

 

-30

o

C

 to +60

o

C

Storage temperature: 

 

-40

o

C to +85

o

C

*Frequencies - Full Bandsplit 

 

UHF: 403-470 MHz

Channel Spacing 

 

12.5 / 20 / 25 kHz

Frequency Stability  

 

1.5 kHz @ 12.5 kHz 

(-30

o

C to +60

o

C, +25

o

C Ref.) 

 

2.0 kHz @ 20/25 kHz

Power 

 

403-470: 1-4W

Modulation Limiting 

 

±2.5 @ 12.5 kHz 

 

 

 

±4.0 @ 20 kHz 

 

 

 

±5.0 @ 25 kHz

Conducted/Radiated Emission 

 

-36 dBm <1 GHz 

 

 

 

-30 dBm 

 1...4 GHz

Adjacent Channel Power 

 

-60 dB @ 12.5 kHz 

 

 

 

-70 dB @ 20/25 kHz

*Frequencies - Full Bandsplit 

 

UHF1: 403-470 MHz

Channel Spacing 

 

12.5 / 20 / 25 kHz

Sensitivity (20 dB SINAD) 

 

0.50 μV typical /  

 

 

 

12.5 kHz

Intermodulation 

 

65 dB

Adjacent Channel Selectivity 

 

60 dB @ 12.5 kHz 

 

 

 

70 dB @ 20/25 kHz

Spurious Rejection 

 

70 dB

Conduncted Spurious Emission 

 

-57 dBm <1 GHz 

 

 

 

-47 dBm 

 1...4 GHz

GENERAL SPECIFICATIONS

TRANSMITTER

RECEIVER

Data is specified for +25°C unless otherwise stated

* Availability subject to individual country’s law and regulations. Specifications are subject to change without notice and are 

issued for guidance only. All specifications listed are typical. Radios meet applicable regulatory requirements. Conforms to 
R&TTE directive 1999/5/EC

MOTOROLA and the Stylised M Logo are registered in the US Patent & Trademark Office. All other product or service 
names are the property of their respective owners. © Motorola, Inc. 2009. All rights reserved. Specifications subject to 
change without notice. All specifications shown are typical. Radio meets applicable regulatory requirements.  
GP644-RE_UK(12/09)

www.motorola.com

Motorola, Ltd. Jays Close, Viables Industrial Estate, 

Basingstoke, Hampshire, RG22 4PD, UK

For more information please contact your local Motorola Authorised Dealer or Distributor

Portable Military Standards 810

Applicable  MIL-STD

810C 

  Methods          Proc./Cat.

810D 

 Methods          Proc./Cat.

810E 

  Methods          Proc./Cat.

810F 

 Methods          Proc./Cat.

810G 

  Methods          Proc./Cat.

Low Pressure

500.1

I

500.2

II

500.3

II

500.4

II

505.5

II

High Temperature

501.1

I, II

501.2

I/A1,II/A1

501.3

I/A1,II/A1

501.4

I/Hot,II/Hot

501.5

I/Hot A1,  

II/Hot (A1)

Low Temperature

502.1

I

502.2

I/C3,II/C1

502.3

I/C3,II/C1

502.4

I/C3,II/C1

502.5

I/C3,II/C1

Temp. Shock

503.1

-

503.2

I/A1C3

503.3

I/C1A3

503.4

I

503.5

I/C

Solar Radiation

505.1

II

505.2

I

505.3

I

505.4

I

505.5

I

Rain

506.1

I, II

506.2

I, II

506.3

I, II

506.4

I, III

506.5

I, III

Humidity

507.1

II

507.2

II

507.3

II

507.4

-

507.5

-

Salt Fog

509.1

-

509.2

-

509.3

-

509.4

-

509.5

-

Blowing Dust

510.1

I

510.2

I

510.3

I

510.4

I

510.5

I

Blowing Sand

-

-

510.2

II

510.3

II

510.4

II

510.5

II

Vibration

514.2

VIII/F, 

Curve-W

514.3

I/10,II/3

514.4

I/10,II/3

514.5

I/24

514.6

I/24

Shock

516.2

I, II

516.3

I, IV

516.4

I, IV

516.5

I, IV

516.6

I, IV

GP644_Datasheet.indd   2

3/12/09   15:54:06

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