Product Documentation

Document	Pages	Notes
GMR25 External Photos
GMR25 Internal Photos
GMR25 User Manual

Product

Parameter	Value	Description
Form Factor	Fixed-Mount	The radio is designed to be permanently attached to a surface using fasteners.
Type	Transceiver	The radio can receive and transmit signals.
Width	107 mm	The distance between the left and right surfaces of the main body of the radio, excluding protrusions.
Height	45 mm	The distance between the top and bottom surfaces of the main body of the radio, excluding protrusions.
Depth	125 mm	The distance between the front and rear surfaces of the main body of the radio, excluding protrusions.
Operating Temperature	-30 to 60 °C	The range of temperatures in which the product is designed to be operated.
Solid Ingress Protection	IP6x	The product is dust-tight.
Liquid Ingress Protection	IPx7	The product is protected against the effects of temporary immersion in water.

Tuning System

Parameter	Value	Description
Channel Capacity	30 max	The number of memory channels that can be programmed into the radio.
Channel Bandwidths	12.5 kHz	The radio's tuning system supports channel spacing of 12.5 kHz.
	25 kHz	The radio's tuning system supports channel spacing of 25 kHz.
Dual Watch	Yes	The radio can monitor two frequencies at the same time.
Scan Type	Channel	The radio's tuning system can scan some or all of the channels programmed into its memory.
Repeater Capable	Yes	Memory channels can have different transmit and receive frequencies, facilitating the use of radio repeaters.

Signaling System

Parameter	Value	Description
CTCSS Tones	51	The number of distinct CTCSS tones supported by the radio.
DCS Codes	104	The number of distinct DCS codes supported by the radio.

Audio System

Parameter	Value	Description
Output Power	3 W max

Receiver

Parameter	Conditions	Value	Description
	Tuning System
	Channel Bandwidth
Personal Bands		FRS	Family Radio Service (462.550 - 467.7125 MHz)
		GMRS	General Mobile Radio Service (462.550 - 467.725 MHz)
Sensitivity Threshold		0.2 µV max	The magnitude of the smallest RF signal that a receiver can detect.
Spurious Rejection		70 dB min	The ratio of a receiver's response to a signal at a desired frequency and its response to signals at other frequencies that cause a response.
Intermodulation Rejection	12.5 kHz	60 dB min	The ability of a receiver to reject intermodulation products produced by the mixing of two or more signals at the input to the receiver.
	25 kHz	65 dB min
FM Hum and Noise	12.5 kHz	-40 dB max	The frequency modulation present on an unmodulated carrier.
	25 kHz	-45 dB max
Audio Distortion		5 % max
Audio Response		-3 to 1 dB	The degree of precision with which the audio signal level of a receiver responds to the frequency deviation of an FM signal.
Monitor Function		Yes	The radio allows the user to manually open the squelch.

Transmitter

Parameter	Conditions	Value	Description
	Tuning System
	Channel Bandwidth
Personal Band		GMRS	General Mobile Radio Service (462.550 - 467.725 MHz)
Operating Frequency		462.55 to 462.725 MHz
		467.55 to 467.725 MHz
Frequency Drift		1 ppm	The amount that a transmitter's frequency varies from its nominal value.
Output Power		25 W max	The maximum RF power that a transmitter can produce, as reported by the manufacturer in product documentation.
Measured Power		24.71 W max	Actual output power measured by a telecommunication certification body (TCB) and reported to the Federal Communications Commission.
FM Hum and Noise	12.5 kHz	-40 dB max	The frequency modulation present on an unmodulated carrier.
	25 kHz	-45 dB max
Adjacent Channel Power	12.5 kHz	-60 dB max
	25 kHz	-70 dB max
Audio Response		-3 to 1 dB	The degree of precision with which the frequency deviation of a transmitter responds to a designated audio frequency signal level.
Audio Distortion		5 % max
Emission Types	12.5 kHz	11K0F3E	11 kHz occupied bandwidth, FM analog voice
	25 kHz	16K0F3E	16 kHz occupied bandwidth, FM analog voice

Channel Selector

Parameter	Value	Description
Location	Front	The channel selector is located on the front panel of the radio.
Type	Rotary Knob	The setting can be adjusted by rotating a round knob.

Volume Control

Parameter	Value	Description
Location	Front	The volume control is located on the front panel of the radio.
Type	Rotary Knob	The setting can be adjusted by rotating a round knob.

Squelch Control

Parameter	Value	Description
Type	Menu Item	The setting can be adjusted by using the radio's menu system.

Keypad

Parameter	Value	Description
Lockable	Yes	The keypad can be configured in a way that disables the function of most keys.

Display

Parameter	Value	Description
Location	Front	The display is located on the front panel of the radio.
Backlit	Yes	The display device is illuminated for better readability in poor lighting conditions.

Internal Speaker

Parameter	Value	Description
Location	Top	The internal speaker is located at the top surface of the radio.

Microphone Port

Parameter	Value	Description
Location	Front Panel	The microphone port is located on the front panel of the radio.

Speaker Port

Parameter	Value	Description
Location	Rear Panel	The speaker port is located on the rear panel of the radio.
Connector Type	3.5mm Mono Mini	2-Position Miniature Phone Jack
Impedance	8 Ω	The effective resistance of the load at audio frequencies.

Programming Port

Parameter	Value	Description
Location	Rear Panel	The programming port is located on the rear panel of the radio.

Antenna Port

Parameter	Value	Description
Location	Rear Panel	The antenna port is located on the rear panel of the radio.
Connector Type	UHF-Female	UHF Female (SO-239)
Impedance	50 Ω

Power Supply Port

Parameter	Value	Description
Location	Rear	The power supply port is located on the rear panel of the radio.
Connector Type	T-Style-Male	2-Position Male T-Style Power Connector
Supply Voltage	13.8 V
Current Draw	4 A max	The maximum amount of current drawn from the power source by the device.
Voltage Indicator	Yes

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