Product Documentation
| Document | Pages | Notes |
|---|---|---|
| DB20-G External Photos | ||
| DB20-G Internal Photos | ||
| DB20-G 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 | 101 mm | The distance between the left and right surfaces of the main body of the radio, excluding protrusions. |
| Height | 36 mm | The distance between the top and bottom surfaces of the main body of the radio, excluding protrusions. |
| Depth | 124 mm | The distance between the front and rear surfaces of the main body of the radio, excluding protrusions. |
| Weight | 0.45 kg | The mass of the main body of the radio, including the removable battery or removable front panel. |
| Operating Temperature | -20 to 60 °C | The range of temperatures in which the product is designed to be operated. |
Tuning System
| Parameter | Value | Description |
|---|---|---|
| Channel Capacity | 500 max | The number of memory channels that can be programmed into the radio. |
| 500 max | ||
| Channel Name Length | 8 max | The maximum number of characters that can be used in a channel name. |
| 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. | |
| Scan Types | Full | The radio's tuning system can scan the full range of operating frequencies. |
| Program | The radio's tuning system can scan all channel frequencies between lower and upper frequency limits. | |
| 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. |
| VFO Mode | Yes | The radio allows direct frequency selection. |
Signaling System
| Parameter | Value | Description |
|---|---|---|
| Signaling Methods | 2-Tone | Two-tone sequential signaling |
| 5-Tone | 5/6/7-tone sequential signaling | |
| DTMF | Dual Tone Multi Frequency | |
| CTCSS Tones | 51 | The number of distinct CTCSS tones supported by the radio. |
| DCS Codes | 1024 | The number of distinct DCS codes supported by the radio. |
Audio System
| Parameter | Value | Description |
|---|---|---|
| Silent Mode | Yes | The radio emits no beeps or other sounds apart from received audio. |
| Output Power | 2 W max | |
| Digital Noise Reduction | Yes | Radio incorporates digital noise reduction technology. |
| Companding | Yes | An audio processing technique that mitigates the effects of a channel with limited dynamic range. |
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) | ||
| Broadcast Bands | FM | FM broadcast band (88 - 108 MHz) | |
| WX | NOAA weather broadcast band (162.400 - 162.550 MHz) | ||
| WX | NOAA weather broadcast band (162.400 - 162.550 MHz) | ||
| Amateur Bands | 2m | Amateur 2-meter band (144.000 - 148.000 MHz) | |
| 70cm | Amateur 70 cm band (420.000 - 450.000 MHz) | ||
| LMR Bands | VHF | Land mobile VHF high band (150 - 174 MHz) | |
| UHF | Land mobile UHF band (450 - 470 MHz) | ||
| Marine Bands | VHF | Marine VHF band (156.050 - 162.025 MHz) | |
| UHF | Marine UHF Band (457.5125 - 457.5875 and 467.5125 - 467.5875) | ||
| Operating Frequency | 65 to 108 MHz | The range of frequencies that can be tuned by the receiver. | |
| 136 to 174 MHz | |||
| 400 to 490 MHz | |||
| Sensitivity Threshold | 12.5 kHz | 0.35 µV max | The magnitude of the smallest RF signal that a receiver can detect. |
| 25 kHz | 0.25 µV max | ||
| Adjacent Channel Selectivity | 12.5 kHz | 60 dB min | The ability of a receiver to discriminate between a desired signal and an undesired signal in an adjacent channel. |
| 25 kHz | 70 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 | 3 % 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 | 2.5 ppm | The amount that a transmitter's frequency varies from its nominal value. | |
| Output Power | 20 W max | The maximum RF power that a transmitter can produce, as reported by the manufacturer in product documentation. | |
| Measured Power | 19.54 W max | Actual output power measured by a telecommunication certification body (TCB) and reported to the Federal Communications Commission. | |
| Spurious Emissions | -60 dB max | Emission on a frequency or frequencies which are outside the necessary bandwidth. | |
| FM Hum and Noise | 12.5 kHz | -36 dB max | The frequency modulation present on an unmodulated carrier. |
| 25 kHz | -40 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 | |
| VOX | Yes | ||
| Busy Channel Lockout | Yes | Indicates that a transmitter can be prevented from operating when a receiver detects activity on the tuned frequency. | |
| Timeout Timer | Yes | Indicates that a radio is capable of limiting the length of each transmission. |
Channel Selector (Front Buttons)
| Parameter | Value | Description |
|---|---|---|
| Location | Front | The channel selector is located on the front panel of the radio. |
| Type | Up/Down Buttons | The setting can be increased or decreased by pressing a pair of buttons. |
Channel Selector (Keypad)
| Parameter | Value | Description |
|---|---|---|
| Type | Keypad | The setting can be adjusted by using a numeric keypad. |
Channel Selector (Mic Buttons)
| Parameter | Value | Description |
|---|---|---|
| Location | Mic | The channel selector is located on a hand microphone. |
| Type | Up/Down Buttons | The setting can be increased or decreased by pressing a pair of buttons. |
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 |
|---|---|---|
| Location | Mic | The keypad is located on a handheld microphone. |
| Backlit | Yes | The keypad keys are illuminated for better visibility in low light. |
| 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. |
| Type | LCD | Liquid Crystal Display with Fluorescent Backlighting |
| Dimmable | Yes | The brightness of the display's backlight can be adjusted by the user. |
Internal Speaker
| Parameter | Value | Description |
|---|---|---|
| Location | Bottom | The internal speaker is located at the bottom surface of the radio. |
Microphone Port
| Parameter | Value | Description |
|---|---|---|
| Location | Front Panel | The microphone port is located on the front panel of the radio. |
| Connector Type | RJ45-Female | 8-Position RJ45 Female |
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 |
Programming Port
| Parameter | Value | Description |
|---|---|---|
| Location | Front Panel | The programming port is located on the front panel of the radio. |
| Connector Type | RJ45-Female | RJ45 Female |
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) |
Power Supply Port
| Parameter | Value | Description |
|---|---|---|
| Supply Voltage | 13.8 V +/-15% | |
| Voltage Indicator | Yes |
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