Radioddity DB40-G Radio Repeater Capable User Manual

DB40-G Radio Repeater Capable

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Specifications:

• GMRS receiver and transmitter, UHF receiver 400-480MHz

• Large screen display with rich content

• Maximum programmable 199 channels

• Three power levels available: HI M LO

• Continuous tone coded squelch system (CTCSS 50) or digital code
  squelch (DCS 104)

• Wide and narrow band options

• Frequency step options: 5.0k/6.25k/12.5k/25k

• Repeater function

• Call tone optional

• Busy channel lockout function

• VOX (Voice Operated Exchange)

Product Usage Instructions:

1. Unpacking and Device Check:

Please handle the walkie-talkie with care as you remove it from
the box. Before disposing of the packaging material, verify the
presence of all items listed in the Accessory List.

2. Power On:

Connect the machine to the power supply and ensure no errors.
Long-press the power/volume knob to power on the machine. The main
interface will indicate successful power-on. In case of abnormal
disconnection, the machine will automatically power on again.

3. Switching Channels:

1. Use the rotary encoder to switch channels.

2. Use the hand-mic plus/minus keys to increment or decrement
   channels.

3. Use the hand-mic numeric keys to directly set the desired
   channel.

4. Frequency Mode and GMRS Channel Mode Switching:

Press the Mode button on the panel or the Mode key on the
hand-mic to switch between GMRS channel mode and VFO mode.

FAQ:

Q: What should I do if any items are lost or damaged during

handling?

A: If any items are lost or damaged during handling, promptly
notify the delivery person and submit a claim.

Q: How do I return the radio to its initial state from various

states?

A: Use the Cancel key, which is designed to return the radio to
its initial state from various states.

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DB40-G User Manual

DB40-G User Manual
1.Introduction ……………………………………………………………………………………………………4 2.Unpacking and Device Check ………………………………………………………………………….. 4 3. Accessory List ……………………………………………………………………………………………….4 4. Main Features: ……………………………………………………………………………………………… 5 5. Structure and Function ……………………………………………………………………………………5
5.1 Front View of Radio ……………………………………………………………………………….. 5 5.2 Rear View of Radio …………………………………………………………………………………6 5.3 Microphone Schematic ………………………………………………………………………….. 7 6. Operation Description ……………………………………………………………………………………. 8 6.1 Power On …………………………………………………………………………………………….. 8 6.2 Switching Channel ………………………………………………………………………………… 8 6.3 Frequency Mode and GMRS Channel Mode Switching ………………………………..9 6.4 Frequency Mode Frequency Step Selection ………………………………………………. 9 6.5 Memory Frequencies ………………………………………………………………………………9 6.6 Scanning ……………………………………………………………………………………………… 9 6.7 Squelch Setting …………………………………………………………………………………… 10 6.8 Backlight Brightness Setting …………………………………………………………………. 10 6.9 Call Function ………………………………………………………………………………………. 10 6.10 VOX Function ……………………………………………………………………………………. 10 6.11 Keyboard lock …………………………………………………………………………………… 11 6.12 Menu Options …………………………………………………………………………………….11 6.13 Extended Channel Frequency Editor …………………………………………………….. 12 6.14 Channel Name Editing (Length 8) ……………………………………………………….12 6.15 Dual Frequency Standby …………………………………………………………………….. 12 6.16 Volume Adjustment ……………………………………………………………………………. 13 7. Channel Frequency Tables ……………………………………………………………………………. 14 8. CTCSS Table ……………………………………………………………………………………………… 15 9. DCS Table …………………………………………………………………………………………………..15 10. Main Parameters ……………………………………………………………………………………….. 16

1. Introduction
Thank you for purchasing the GMRS radio. To ensure optimal performance, we kindly request that you thoroughly read this manual. The GMRS DB40-G is a compact and user-friendly car radio transmitter, designed to deliver excellent performance. Its straightforward panel layout and intuitive operating functions enable customers to quickly get started.
2. Unpacking and Device Check
Please handle the walkie-talkie with care as you remove it from the box. Before disposing of the packaging material, we advise you to verify the presence of the following items in the box.

3. Accessory List
Item Radio Fixed base Microphone Microphone base User Manual DC lead Screw bag

Unit

Quantity

pc

1

pc

1

pc

1

pc

1

pc

1

pc

1

pack

1

Programming Cable

pc

1

If any items are lost or damaged during handling, we kindly request that you promptly notify the delivery person and submit a claim.

4. Main Features:
GMRS receiver and transmitter, UHF receiver 400-480MHz Large screen display, the display content is rich, easy to
understand Maximum programmable 199 channels Three power levels availableHI M LO Continuous tone coded squelch systemCTCSS 50or digital code
squelchDCS 104Reject excess calls from other stations.

Wide and narrow band are optional Frequency step5.0k/6.25k/12.5k/25k Repeater function Call tone optional Busy channel lockout function VOX
5. Structure and Function
5.1 Front View of Radio

5.2 Rear View of Radio

No.

Name

1

Microphone Interface

2

Transmit/Receive Indicator

3

LCD Panel

4

Power/Volume Knob

5

Channel and Parameter Adjustment Knobs

6

Call Function Keys

7

Mode Function Keys

8

Scanning Function Keys

9

Squelch Level Function Keys

10

Brightness Adjustment Function Keys

11

Function Cancel Keys

12

External Speaker Interface

13

Power Connection Cable

14

Antenna Connector

5.3 Microphone Schematic

No.

Name

1

PTT

2

Up or Down / Add or Subtract

3

Shortcut Channel Switch / Save Key

4

Cancel Function

5

VOX Key

6

MIC

7

Mode Switch

8

CALL Function

9

Scan Function

10

Channel Name/Extend Channel Edit

11

Numbers 0-9 Function

12

Menu Function

13

Extended Channel Delete Key/ Keyboard Lock

Under normal circumstances, pressing any key will result in a confirmation tone.
When the radio successfully executes the command associated with the key, it responds with a “B” response.
In case the radio fails to execute a key command, it responds with a “DU” response.
The “Cancel” key is designed to return the radio to its initial state from various states.
6. Operation Description
6.1 Power On Connect the machine to the boat’s power supply and ensure there are no errors. Long-press the power/volume knob to power on the machine, indicated by entry into the main interface. In case of abnormal power disconnection, the machine will automatically power on again.
6.2 Switching Channel 1> Use the rotary encoder to switch channels. 2> Use the hand-mic plus/minus keys to increment or decrement channels. 3> Use the hand- mic numeric keys to directly set the desired channel.

6.3 Frequency Mode and GMRS Channel Mode Switching Press the “Mode” button on the panel or the “Mode” key on the hand-mic to switch between GMRS channel mode and VFO mode.
6.4 Frequency Mode Frequency Step Selection Press the numeric keys to set the frequency directly. Alternatively, press the “*” to enter the frequency step setting menu and choose from 5k, 6.25k, 12.5k, or 25k steps.
6.5 Memory Frequencies In the frequency mode, press the memory key to display the prompt “press MX to memorize the frequency.” Then, press M1/M2/M3 to record the current frequency. To quickly switch to the recorded frequency, you can short press M1/M2/M3.
6.6 Scanning In channel mode, press “SCAN” to perform channel scanning; In VFO mode, press “SCAN” to perform frequency scanning, and the scanning range can be set in the menu. Press “RECORD” to save the useful frequency points. Press up and down to switch between forward and reverse scanning or skip the useful channel

(frequency point) to continue scanning.
6.7 Squelch Setting Short press the “SQ” key to set the squelch level. Use the Up/Down key to adjust the level, or directly input the desired level using the numeric keys. When the setting is complete, press the “CAN” or “SQ” button again to exit the setting. Press and hold “SQ” key for 3 seconds to turn on forced monitoring.
6.8 Backlight Brightness Setting Short press the “Brightness” button to set the backlight brightness level. Adjust the level using the plus/minus key or directly input the desired level using the numeric keys. Press the “Cancel” or “Squelch” button again to exit the setting.
6.9 Call Function Press the Select Call key to make a call. Choose from 1-5 different call tones.
6.10 VOX Function Press the VOX button on the speaker to turn the VOX function
on or off. To adjust the VOX level, press “*” on the microphone to

enter the menu and use the Up or Down key to select the desired level.
6.11 Keyboard Lock Press and hold the “#” button for 3 seconds to lock or unlock the keypad. When the keypad is locked, only the PTT button can be used.
6.12 Menu Options In standby mode, press the encoder or the hand-mic “*” key to enter the menu. The menu options include: 1.1> Transmit power (low/medium/high) 1.2> Dual frequency standby 1.3> Repeater switch (15-22 channels) 1.4> Bandwidth (wideband /narrowband) 1.5> SubsonicOFF/CTC/CDC 1.6> Transmit subsonicOFF/CTC/CDC
1.7> VOX level SET
1.8> BCLO (On/Off) 1.9> Key tone (on/off) 1.10> Call tone selection (0-5) 1.11> TOT 0-300S

6.13 Extended Channel Frequency Editor Please note that channels 1-30 are reserved for the main channels and cannot be edited, only 031-199 can be freely set for extended channels.
To add the current frequency to an extended channel, follow these steps:
1. Switch to VFO mode. 2. Press the “RECORD” button on the hand-mic to initiate the saving process. 3. Choose a desired channel to store the frequency. Please note that if the selected channel (CH031-199) is already occupied, the saving process will fail. Ensure that the channel is empty before attempting to save the frequency.
6.14 Channel Name Editing (Length 8) Press “RECORD” to set the channel name. Use the knob (or hand-mic Up or Down) to modify the characters. Press ENCODER or MODE to switch to the next character, and press PTT to end the edit.
6.15 Dual Frequency Standby Under any channel, press the hand-mic “” to set the

dual-frequency standby channel. Press and hold the SCAN button to enter the dual-frequency standby screen. The main channel can be switched between each other using the hand-mic “#” key.
6.16 Volume Adjustment Rotate machine button 4 to adjust the sound volume of the radio

7. Channel Frequency Tables

Channel Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

GMRS Frequency MHz 462.5625 462.5875 462.6125 462.6375 462.6625 462.6875 462.7125 467.5625 467.5875 467.6125 467.6375 467.6625 467.6875 467.7125 462.5500 462.5750 462.6000 462.6250 462.6500 462.6750 462.7000 462.7250 462.5625 462.6125 462.6625 462.7125 462.55 462.600 462.650 462.700

Fixed Privacy

Band Width
Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow Narrow Narrow Narrow Narrow Narrow Narrow Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide Narrow or Wide

TX Power
Low Low Low Low Low Low Low RX RX RX RX RX RX RX High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low High/Low

8. CTCSS Table

1

67.0

18

2

69.3

19

3

71.9

20

4

74.4

21

5

77.0

22

6

79.7

23

7

82.5

24

8

85.4

25

9

88.5

26

10

91.5

27

11

94.8

28

12

97.4

29

13

100.0 30

14

103.5 31

15

107.2 32

16

110.9 33

17

114.8 34

118.8 35 123.0 36 127.3 37 131.8 38 136.5 39 141.3 40 146.2 41 151.4 42 156.7 43 159.8 44 162.2 45 165.5 46 167.9 47 171.3 48 173.8 49 177.3 50 179.9

183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.1

9. DCS Table
No code No code No code No code No code No code 1 023 21 125 41 245 61 356 81 506 101 732 2 025 22 131 42 246 62 364 82 516 102 734 3 026 23 132 43 251 63 365 83 523 103 743 4 031 24 134 44 252 64 371 84 526 104 754 5 032 25 143 45 255 65 411 85 532 6 036 26 145 46 261 66 412 86 546 7 043 27 152 47 263 67 413 87 565 8 047 28 155 48 265 68 423 88 606 9 051 29 156 49 266 69 431 89 612 10 053 30 162 50 271 70 432 90 624 11 054 31 165 51 274 71 445 91 627 12 065 32 172 52 306 72 446 92 631 13 071 33 174 53 311 73 452 93 632 14 072 34 205 54 315 74 454 94 654 15 073 35 212 55 325 75 455 95 662 16 074 36 223 56 331 76 462 96 664 17 114 37 225 57 332 77 464 97 703 18 115 38 226 58 343 78 465 98 712 19 116 39 243 59 346 79 466 99 723 20 122 40 244 60 351 80 503 100 731

10. Main Parameters

Frequency range Receiver 400.000-480.000MHZ Transmitter:GMRS frequency Channel spacing 5KHz6.25KHz12.5KHz25KHz

Supply Voltage 13.8V±15%

Transmitter output power
Carrier frequency tolerance Modulation limiting Dissipation current

HI40W M20W LO5W 2.5PPM
5Khz
10A

Receiver Reference sensitivity

400-4200.30uV 420-4700.25uV

Threshold squelch on sensitivity(ASQ2)
Audio Harmonic Distortion
Modulated Receive Bandwidth

0.20uV 7% 3/5khz

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