Motorola Analogue Mobile Base Station 25W Radio GM338

Frequency Range: VHF 136-174MHz; UHF 403-470MHz
Storage Channel: 128 Channels
Dimensions: 186mm x 179mm x 59mm
Weight: 1400gms


1. Features

GM338 & GM398 Common Key Features & Benefits

Advanced Signalling Capability

GM338 & GM398 support a comprehensive range of signalling schemes such as MDC1200, Private Line & Digital Private Line, Quick Call II and DTMF.

Excellent Audio Technology

Motorola’s special voice compression and low level expansion technology ensure crisper, clearer and stronger audio quality, allowing you to communicate even in a noisy working environment.

Programmable Channel Spacing (12.5/20/25 kHz)

Both radios allow programmable channel spacing of 12.5/20/25kHz, offering flexibility and easy migration of channel spacing and protecting your investment should your country’s regulatory channel spacing requirement change.

Large Control Buttons

The intuitive driven menu together with the large control buttons on the front panel of the radio provide users easy navigation of menu and exit functions.

Dual Priority Scan

Both GM338 & GM398 support up to 16 scan lists and the scan function can be assigned to any of the function buttons. The dual priority scan feature allows frequent scanning of priority channels.

Remote Mount Control Head

The remote mount control head can be mounted on the dash board without the radio chasis, ideal when space is a constraint.

Status Call/Messaging

Up to 16 pre-defined text messages can be assigned to enable users to send frequently used messages and statuses quickly, without the need to talk.

Covert Emergency Signalling

Allows users to discreetly send help signals to a pre-defined person or group of users, providing added peace of mind.

GM338 Features & Benefits

4 Customised Buttons

Easy to use, users have the flexibility to dedicate the most useful operations to these specific buttons for instant onetouch access.

Optional Voice Storage

Through an optional voice storage board, the GM338’s capabilities can be expanded to incorporate the recording & playback of messages, or personal memos for up to 120 seconds.

128 Channel Capacity

With a full 128-channel operating capacity, the GM338 conventional mobile allows users greater flexibility to program each channel individually for different power output, private line (PL)/Digital private line (DPL) for privacy call, as well as repeater/talkaround and busy channel lock out to enhance communication efficiency.

14 Characters 1-line Alphanumeric Display

The large alphanumeric display with icons such as signal strength indicator and caller identification makes it easy to read both text and icon displays.

Enhanced signalling Features for GM338

I) MDC1200 Signalling Protocol

• PTT ID Enables the transmission of caller ID and allows users to identify incoming callers.

• Selective Radio Inhibit Should the radios be stolen or go missing, the selective radio inhibit feature enables remote deactivation of the radios, providing greater security.

• Call Alert The radio emits an alert tone to notify individual users that someone is trying to reach them.

• Voice Selective Call The radio receives and sends dedicated individual voice messages for privacy or group voice messages for improved productivity.

• Radio Check This feature monitors if the radio is working or operating within range.

• Emergency Signalling Sends help signals for added security.

II) Quick Call II Signalling Protocol

• Call Alert Voiceless paging with continuous alert tones that alerts users on incoming calls.

• Selective Call Paging alerts followed by a voice message.

2. Specifications

General Specifications

 Frequency Range


Memory Channel

128 Channels

Channel  Spacing

12.5/20/25 kHz

Power Output

1 - 25W; 25 - 45W

Power Supply

13.2Vdc (10.8 - 15.6 Vdc) Negative Vehicle ground

 Dimensions (L×W×H)

186mm x 179mm x 59mm


1400gms (3.15 lbs)

 Communication Range

 about  10-20km


Passes  rain testing to IP54


Meets  MIL-STD 810-C,D&E and TIA/EIA 603

Transmitter Specifications

Modulation Limiting

± 2.5kHz @12.5kHz; ± 4.0kHz @20kHz; ± 5.0kHz @25kHz

FM Hum &  Noise

- 40dB @  12.5kHz; - 45dB @ 20/25kHz

Conducted/Radiated  Emissions

- 36dBm < 1 GHz; - 30dBm < 1 GHz

Adjacent  Channel Power

- 60dBm @  12.5kHz ; - 70dBm @ 20/25kHz

Receiver Specifications

Intermodulation  (EIA)

78dB (VHF); 75Db(UHF)

Adjacent  Channel Selectivity

- 40dB @ 12.5kHz; - 45dB @ 20/25kHz

Audio Response (300 to 3000Hz)

+ 1, 3dB

3. Shipping

4. Payment

EEC. accept online payment method--Paypal, which takes data encryption technology to make Paypal pay safe enough, so customers no need to worry about the private infomation betraied. And Paypal is convenient for customers and sellers to trade. Seller could send Invoice first to customer for making payment. To avoid customers do not know how to make payment.

Offline payment also be accepted -- Telegraphic Transfer (TT), Western Union, MoenyGram which is convenient, reasonable, simple and Global.