BK Technologies GMH599 VHF Mobile Transceiver User Manual Manual Section 1
RELM WIRELESS CORP. - BK RADIO VHF Mobile Transceiver Manual Section 1
Contents
Manual Section 1
Specifications are subject to change without notice.
BK RADIO
Page 1-1
SECTION I
GENERAL INFORMATION
1.1 INTRODUCTION
This manual contains information about the physical, mechanical, and electrical characteristics of the BK
Radio GMH Flex•Mode Series mobile VHF radios.
1.2 DESCRIPTION
The GMH Flex•Mode Series radio is a mobile VHF FM transceiver covering the frequency range of
136MHz to 174MHz. The GMH features an alphanumeric eight-character vacuum fluorescent display,
allowing the channels to be named for easy user recognition.
An arrow on the vacuum fluorescent display points to each front mounted push button that is active. The
five push buttons can be programmed with the following functions:
Standard Functions Optional Functions
MON Monitor Squelch Noise TA Repeater Talk Around GSC Group Scan
SCN Channel Scan CG Code Guard Disable SQL Squelch Adjust
PRI Priority Scan GRP Channel Group ACC Accessory 1
PA Public Address SPK External Speaker ACC Accessory 2
HOM Home Channel NXT Next Scan Channel ACC Accessory 3
LPW Low Power Select
The microphone connector provides an RS-232 interface for control by a keypad microphone, and for
dealer programming of alphanumeric labels, push button functions, channel frequencies, Code Guard™
values, and Dual Tone Multiple Frequency/Automatic Numeric Identifier (DTMF/ANI) encode information.
Figure 1-1 CONTROLS
General Information GMH Series VHF Radio
Specifications are subject to change without notice.
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BK RADIO
1.3 TECHNICAL CHARACTERISTICS
FREQUENCY RANGE 136–174MHz
CHANNELS 320 (20 groups of 16 channels)
OPERATING VOLTAGE 13.6 Vdc Negative ground
OPERATIONAL FEATURES
Fluorescent Alphanumeric DIsplay Included
Enhanced User CG Programmable
Code Guard Squelch (CTCSS & CDCSS) Programmable
Time Out Timer Programmable
Frequency Display Programmable
User Select Scan Programmable
Dual Priority Scan Programmable
Busy Channel Lockout Programmable
Busy Channel Indicator Programmable
DTMF ANI Programmable
Talk-back Scan Programmable
Interstitial Frequency Capability Programmable
PRIMARY POWER INPUT
Receive @13.8V 1.0 Amperes
Transmit @ 13.6V 16.0 Amperes
Standby @ 13.8V 5 Amperes
OPERATING TEMPERATURE -30° to +60° C
PHYSICAL DIMENSIONS
Width 6 in.
Depth 9.38 in.
Height 2.12 in.
Weight 5 lbs.
FREQUENCY STABILITY ± 2.5 PPM
CHANNEL SPACING 25/30 kHz and 12.5/15 kHz
CHANNEL INCREMENTS 6.25/2.5 kHz
ANTENNA CONNECTOR MINI UHF
FCC IDENTIFICATION NUMBER Pending
GMH Series VHF Radio General Information
Specifications are subject to change without notice.
BK RADIO
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TRANSMITTER`
25/30 12.5/15
RF OUTPUT POWER 15 to 50 Watts 15 to 50 Watts
OPERATING FREQUENCY SPREAD 38 MHz 38 MHz
MODULATION DEVIATION ± 5 kHz ± 2.5 kHz
SPURIOUS AND HARMONICS 80dB 80dB
HUM AND NOISE 50dB 45dB
AUDIO DISTORTION 3% 3%
ANTENNA OUTPUT IMPEDENCE 50 Ohms 50 Ohms
AUDIO RESPONSE +1 to –3dB +1 to –3dB
RECEIVER
25/30 12.5/15
SENSITIVITY: 12dB SINAD 0.28µV0.28
µV
FREQUENCY SPREAD 38 MHz 38 MHz
SELECTIVITY 75dB 63dB
SPURIOUS INCLUDING IMAGE 80dB 80dB
INTERMODULATION 75dB 63dB
MAX AUDIO OUTPUT (5% DISTORTION) 4 Watts 4 Watts
AUDIO FREQUENCY LOAD 3.2 Ohms 3.2 Ohms
INPUT IMPEDENCE 50 Ohms 50 Ohms
AUDIO RESPONSE +1 to –3dB +1 to –3dB
HUM AND NOISE -45 dB -45 dB
1.4 ACCESSORIES
A wide variety of optional accessories are available for the GMH mobile radios. Contact your BK Radio
dealer for complete information.
1.5 LICENSE REQUIREMENTS
This equipment must be licensed by the Federal Communications Commission (FCC) before it may be
used. Your BK Radio dealer can assist you in filing the appropriate application for the FCC, and will
program each radio with your authorized frequencies and signaling codes.
1.6 SERVICE INFORMATION
If you need service, contact your local BK Radio dealer equipped to service your radio. If you find it
impractical to have service performed by your local dealer, contact BK Radio at the address below:
BK Radio, Inc.
ATTN: Customer Service
7505 Technology Drive
West Melbourne, FL 32904
Voice (800) 422-6281
FAX (407) 953-7986