The com Com-db90 User manual

Owner’s Manual

COM-DB90Mobile Radio &

S4S Stereo Intercom

Premium UTV Communication System

Congratulations on your purchase and welcome to the COMplete Radio InterCOM

COMmunication family. We thank you for your purchase with care the unit should give you good

service.

Please read these instructions carefully, by doing so you will get full use of the products

This Manual is broken up into parts:

1. Radio manual

2. Intercom manual

Email if you have any questions or concerns that this manual does not address.

www.utvcom.com

info@utvcom.com

 
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Contents 
COM-DB90 Dual Band Mobile Radio ............................................................................................ 1 
Features................................................................................................................................... 1 
Info & Warnings......................................................................................................................... 1 
FCC Notice ................................................................................................................................. 2 
RF Energy Exposure................................................................................................................... 2 
Getting to Know The COM-DB90 ............................................................................................. 4 
Front of the Radio................................................................................................................... 4 
Back of the Radio.................................................................................................................... 6 
Hand Mic ................................................................................................................................ 7 
Screen Icons............................................................................................................................ 8 
Antenna....................................................................................................................................... 9 
Mounting Tips......................................................................................................................... 9 
Antenna Ground Wire............................................................................................................. 9 
Powering TheCOM................................................................................................................... 10 
Turing off the Mobile Radio................................................................................................. 10 
Operations................................................................................................................................. 10 
Adjusting the volume............................................................................................................ 10 
Receiving & Transmitting a Call.......................................................................................... 10 
Selecting a Channel............................................................................................................... 10 
Toggling between Bands A/B/C/D....................................................................................... 11 
Function Menu.......................................................................................................................... 12 
Other Settings and Options....................................................................................................... 18 
Programing............................................................................................................................ 18 
Keypad Lock-out .................................................................................................................. 18 
PTT ID.................................................................................................................................. 18 
Scanning Modes.................................................................................................................... 18 
Troubleshooting TheCOM-DB90............................................................................................. 19 
Specifications............................................................................................................................ 20 
Technical Specifications....................................................................................................... 20 
Receiver Specifications......................................................................................................... 20 
Transmit Specifications ........................................................................................................ 20 
Frequency List .......................................................................................................................... 21 
S4S Stereo Intercom..................................................................................................................... 24 

 
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Introduction............................................................................................................................... 24 
Main Features............................................................................................................................ 25 
Installing TheCOM................................................................................................................... 26 
General Install Guidelines..................................................................................................... 26 
Headsets.................................................................................................................................... 27 
Installing Helmet Headsets................................................................................................... 27 
Mic Placement ...................................................................................................................... 27 
Fitting the headset parts to your helmet................................................................................ 27 
Front Keypad Controls.............................................................................................................. 29 
Power On / Off...................................................................................................................... 29 
Volume Controls................................................................................................................... 29 
VOX...................................................................................................................................... 29 
Rear Intercom Ports .................................................................................................................. 30 
Power Wires.......................................................................................................................... 30 
PTT ....................................................................................................................................... 30 
Radio..................................................................................................................................... 30 
Audio Out.............................................................................................................................. 30 
Phone / Audio In................................................................................................................... 31 
HS-1...................................................................................................................................... 31 
HS-2...................................................................................................................................... 31 
HS-3...................................................................................................................................... 31 
HS-4...................................................................................................................................... 31 
Bluetooth................................................................................................................................... 32 
Troubleshooting the S4S........................................................................................................... 32 
Contact Info .............................................................................................................................. 33 
 

COM-DB90 Dual Band Mobile Radio

Features

TheCOM-DB90 mobile 2-way radio is unique for its compact body, powerful output and

frequency range design. It's also designed with new and personalized operation menu to give you

easy-to-use and exceptional operation experience. We believe its mini size and cost-effective

price will allow the off-road community the ability to install the radio in more locations without

having to modify their vehicles.

Before operation and to obtain the best performance, we recommend that you read this user

manual carefully to become familiar with the features.

➢Frequency range VHF 136-174 MHz / UHF 400 –480 MHz

➢Color Display

➢Simple plug and play connection to the S4S intercom

Info & Warnings

IMPORTANT! Changes or modifications to this unit not expressly approved by TheCOM could

void your right to operate this unit. Your radio is set up to transmit a regulated signal on an

assigned frequency. It is against the law to alter or adjust the settings inside the mobile radio to

exceed those limitations. Any adjustment to your radio must be made by qualified technicians.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two

conditions;

1. this device does not cause any harmful interference, and

2. this radio must accept any interference that may cause undesired operations.

Use only “TheCOM” supplied or approved accessories, cables and headsets.

Turn off your radio prior to entering any area with flammable materials. Do not operate or turn

on your mobile radio at a gas station or while fueling your vehicle.

Do not mount your radio in the area over an air bag deployment area if equipped or in a location

that obstructs the drives sight.

Do not expose the radio to direct sunlight for prolonged periods of time, nor place it close to a

heat source.

Do not transmit for long intervals, as it may overheat the mobile radio.

Do not pressure wash your COM for any reason. To clean, blow off as much dust and debris then

wipe with a damp cloth while the unit is in the OFF position. Allow to dry for several hours then

operations may resume.

If the unit emits smoke or an odor, you should immediately cut off the power supply. Then

Protect your unit as much as possible from dusty, damp and wet conditions and never submerge

TheCOM

Use the correct power supply. TheCOM is designed to operate at about 12.0 to 13.8V; do not use

24V power supply to TheCOM or mobile radio.

If there's any electromagnetic interference, please keep the mobile radio away from the sources

such as TV set, engine generator etc.

FCC Notice

The COM-DB90 operates on UHF/VHF frequencies, which require a Federal Communications

Commission (FCC) license (learn more here https://www.fcc.gov/). You must be licensed prior

to operating. Serious penalties may result from unlicensed use or operation in violation of FCC

rules, as stipulated in the Communications Act’s Sections 501 and 502 (amended). You will be

issued a call sign by the FCC that should be used for station identification when operating your

radio. You should also cooperate by engaging in permissible transmissions only, avoiding

channel interference with other users, and being prudent with the length of your transmission

time.

To obtain a license or ask questions about the license application, contact the FCC at 1-888-

CALL FCC or go to the FCC’s website: https://www.fcc.gov/

Request form 605.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two

conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause

undesired operation

The scanning receiver in this equipment is incapable of tuning, or readily altered, by the user to

operate within the frequency bands allocated to the Domestic public Cellular

Telecommunications Service in Part 22.

WARNING: Modification of this device to receive cellular radiotelephone service signals is

prohibited under FCC rules and federal law.

RF Energy Exposure

The COM-DB90 is designed to comply with the following national and international standards

and guidelines regarding exposure of human beings to radio frequency electromagnetic energy.

➢United States Federal Communications Commission (FCC), Code of Federal

Regulations: 47 CFR part 2 sub-part J

➢To control your exposure and ensure compliance with the general population or

uncontrolled environment exposure limits, transmit no more than 50% of the time. The

radio generates measurable RF energy exposure only when transmitting.

➢The consumer must maintain a minimum safe separation distance of 2 ft from the antenna

when transmitting.

Getting to Know The COM-DB90

Please check the packaging of your radio for any signs of damage. Carefully open the box, if you

find the radio or the included accessories are damaged or lost, immediately contact your dealer or

us at [email protected]

Front of the Radio

1. V/M Mode Switch (Channel/Frequency)

2. Monitor (Moni) function

3. Call key

4. FM radio function key

5. Power, On/Off (Press) & Volume Knob (Rotate)

6. Exit Menu, Toggle A/B/C/D bands

7. Display screen

8. RJ-45 Microphone Connector

9. Channel Selector (rotate) Menu Knob (Press) Confirm Key (Press)

Toggle between

Memory & Channel

mode (for simple

channel driven radio

leave on memory

mode)

Current band indicator

(similar to AM and FM on

your car radio

Radio Volume &

press and hold to

power down or

power up

Channel

Selector or

press to

enter radio

Toggle between

bands A, B, C & D

Back of the Radio

1. TRRS 3.5 mm connection for S4S intercom connection –Pinout diagram below:

2. DATA, Programming Jack TRS 3.5 mm: (Restricted to comply with FCC Part 90)

3. Cooling Fan

4. SO-239 RF Antenna Connector: Connects to PL-259 Antennas

5. 12V DC Power supply (13.8 Volts –7 Amps peak)

Hand Mic

1. “MENU” - Function key VFO/MR Toggle (Long Press)

2. “UP”: - Toggle up

3. “DOWN” - Toggle down

4. “EXIT” - Exit the ABCD band selection, activate alarm (Long Press)

5. “*/SCAN” - Scanning function

6. “#/LOCK” - High / Low Power Toggle, Keypad Lock (Long Press)

7. “0” - Number 0

8. “1” - Number 1

9. “2” - Number 2

10. “3” - Number 3

11. “4” - Number 4

12. “5” - Number 5

13. “6” - Number 6

14. “7” - Number 7

15. “8” - Number 8

16. “9” - Number 9

Screen Icons

Offset / simplex indicator

Not used on this model

Wide / Narrow Band

Output power H/L

DTF signaling

Frequency Reversal

CTCSS Tone

Keypad Lock

Radio can Transmit & Receive

Battery indictor

Shows Receive

signal intensity.

Shows transmit

output power.

Shows microphone signal

transmit intensity.

Shows the numerical

receive intensity

Antenna

Do not transmit without an antenna attached to the mobile radio. This can cause stress and harm

to the internal transmitter and damage the mobile radio.

Choose an antenna suitable for transmitting on user frequencies with an impedance of 50 ohm. If

an antenna is not properly tuned for the frequency you transmit on this could cause reflective

damage to the radio. Target an SWR of 1.5:1 and never exceed a SWR of 2.5.

Mounting Tips

It is best to mount the antenna to the vehicle’s roof, roll bar or similar location. Specific

installation requirements vary between vehicles. Use the following guidelines to install the

antenna.

1. Mount the antenna as high on the vehicle as possible. The higher the better.

2. Metal surfaces covered by fiberglass or vinyl may affect radio range. Avoid these

locations.

3. If possible, mount the antenna in the center of whatever surface you choose.

4. Coax cable and connectors should be rated for 50 ohm.

5. Choose the proper length coax cable for your application. We offer many lengths that

typically fit most UTV’s.

a. If you have extra length, try to re-rout the coax to use up the extra length.

b. Never coil the coax in a coil or coil the extra around the antenna.

6. Route the antenna cable through an accessible entry point, such as a firewall grommet or

kick panel.

7. When routing the coax cable, avoid noise sources that create RF energy, such as the

ignition system, gauges, power wires, rotation shafts, etc.

8. Prevent cable damage, such as pinching the coax, sharp edges or right angles. Use

sweeping curves .and avoid pinch points between seams. Make use of existing gaskets,

grommets and weather stripping to protect the cable along its route or drill relief holes.

9. Additional grounding of the coax cable may be necessary. To achieve this simply connect

a ground wire to a ground location on the vehicle (such as the bodies bare metal) then to

the underside of the base of the NMO connector.

Antenna Ground Wire

Place the antenna ground wire against the bottom side of the NMO connector. Make sure each

terminal is in intimate connection with the NMO connector and bare steel on the chassis of the

vehicle.

Blue terminal to the

nearest chassis ground

Red terminal to the

bottom of the NMO

Powering TheCOM

It is preferred that TheCOM be connected (the positive lead RED wire) directly to the positive

post of the vehicle’s battery. If this is not available a fuse block may be used. If external noises

are heard through the radio such as “alternator wine” (could be from pumps, switches, lights,

clutch fans, other accessories) it is recommended that the power be re-rout directly to the battery

posts.

Turning on the Mobile Radio

Press and hold the volume knob down until the display lights up.

Turing off the Mobile Radio

Press and hold the volume knob down until the display powers down.

Operations

Adjusting the volume

The volume control on the mobile radio affects the overall volume to TheCOM users. It is

typically set a half a turn from the bottom. Turning the volume clockwise will increase the radio

volume and counterclockwise will lower the volume. It is best to adjust the volume while

someone else is broadcasting. For best results we suggest setting the radio to the local weather

channel (see below common channels for weather frequency) and slowly turn the radio volume

clockwise until desired volume is clear. Sometimes backing the volume on the radio slightly will

give a clearer communication from outside signals. After the radio is set, fine tune the volume

with the individual volume controls found on the intercom.

Receiving & Transmitting a Call

Both the receiving radio and the transmitting radio need to be on the same frequency (channel)

that includes privacy codes (CTCSS or DCS codes).

To make a call, press and hold the PTT button wait a moment before speaking and speak into the

microphone. If using a headset, make sure that mic is right against your lips. If using a hand mic,

hold the hand mic about 1-2 inches from your mouth.

To receive a call release the PTT and listen for the transmission to come through. Adjusting your

volume as necessary.

Selecting a Channel

Turn the selector knob to select your desired channel. Alternatively, the up and down arrows on

the mic will change the channel as long as the keypad is not locked. Additional frequencies are

programed into the radio like the weather channels, but they are receive only.

Toggling between Bands A/B/C/D

Pressing the “Exit/ABCD” will toggle between the four different band on the radio.

Current Main

Band

indicator.

Band

This Icon

shows that this

band is being

monitored

Function Menu

Note that due to part 90 requirements many of the menu functions have been restricted or

deactivated.

To enter the menu press the knob to the right of the screen. Menus may be quickly jumped to by

typing the menu number in on the hand mic.

Name

Description

Secondary

Notes

TMR

Transmit Multi Receive -

This mode selects what

displays are monitored in

the background besides

the primary selected

channel

Off

Disable TMR

M+A

Main band + A band standby

M+B

Main band + B band standby

M+C

Main band + C band standby

M+D

Main band + D band standby

M+A+B

Main band +A & B band standby

M+A+C

Main band + A & C band standby

M+A+D

Main band + A & D band standby

M+B+C

Main band + B & C band standby

M+B+D

Main band + B & D band standby

M+C+D

Main band + C & D band standby

M+A+B+C

Main band + A, B & C band standby

M+A+C+D

Main band + A, C & D band standby

M+B+C+D

Main band + B, C & D band standby

A+B+C+D

All bands are monitored on standby

STEP

Frequency Step Size Setup

2.50k

In frequency step in VFO

(frequency) mode, press (up) and

(down) to select step figure.

5.00k

6.25k

10.00k

12.50k

25.00k

SQL

Squelch Level

00 > 09

10 Squelch levels

00 = minimum / normally open

TXP

Transmit Power

High

Full Power ~20W

Low

Reduced power ~7W

SCR

Scrambler

Scrambler Function Enabled

Off

Scrambler Function Disabled

TOT

TX Time Out Timer

15 > 600 sec

15 Second Steps

APO

Auto Power Off

30, 60 > 300

Minutes

Time set that the radio will power

down after the last signal is received

Off

Turns off APO option

Bandwidth

Wide Band

25.0 kHz

Name

Description

Secondary

Notes

Narrow

Band

12.5 kHz

ABR

Unused Setting

Beep

Keypad audible tone

On/Off

Turn On/ Off keypad tone

R-DCS

Receive - Analog Tone

Squelch

D023N >

D754I

Squelch opens when proper DCS

code is detected

Off

No DCS code required

R-CTCS

Receive - Analog Tone

Squelch

67.0 >

254.1 Hz

Squelch opens when proper CTCSS

tone is detected

Off

No CTCSS tone required

T-DCS

Transmit - DCS Code

D023N >

D754I

Transmits specified code

Off

No DCS codes transmitted

T-CTCS

Transmit - CTCSS Code

67.0 >

254.1 Hz

Transmits specified code

Off

No CTCSS codes transmitted

DTMFST

Determines when DTMF

codes are heard through

speaker

Off

No DTMF tone heard

DS-ST

Only manually keyed DTMF codes

are heard

ANI-ST

Only automatically keyed DTMF

codes are heard

DT-ANI

All DTMF codes are heard

BCL

Busy Channel Lockout

Prevents transmit if active signal on

the channel

Off

No lockout

SC-ADD

Add Scan Channel

Add channel to scan list

Off

Remove channel from scan list

SC-REV

Scan Resume Method

(Time Operations) Scan stops when

a signal is detected the scan

resumes after approximately 5

seconds (even if the channel is still

active).

(Carrier Operation) Scan stops when

a signal is detected. Scan resumes

when signal disappears

(Search Operation) Scan stops when

signal is detected. Scanning will not

resume.

OPTSIG

Optional Signaling

Off

No Optional signaling

DTMF

DTMF signaling selected

2 Tone

2 Tone signaling selected

5 Tone

5 Tone signaling selected

Name

Description

Secondary

Notes

SPMUTE

Speaker Mute Setting

Squelch opens for CTCSS/DCS tones

only.

AND

Squelch opens when CTCSS/DCS

tone is recognized along with the

optional signaling.

Squelch opens when either the

CTCSS/DCS tone or the optional

signaling is recognized.

PTT-ID

PTT-ID- When to send

Off

Do not send

BOT

Send at beginning of transmission

EOT

Send at the end of transmission

Both

send at both beginning and end

PTT-LT

PTT ID - transmit Delay

0 > 30

Set delay time before transmitting

PTT-ID

S-INFO

Auto Group Dialing

Group

Signal Code

Memory

1 > 15 (Can only be set with

software)

EMC-TP

Alarm Mode

ALARM

Turn on alarm sound

ANI

Send alarm code and ID Code

Both

Both of the above

Off

Alarm mode completely disabled

EMC-CH

Alarm Channel

000 > 199

Specified Alarm Channel

SIG-BP

Signal Beep

Pager ring at reception of matching

2Tone / 5Tone / DTMF

Off

CHNAME

Channel Name edit

Channel Mode, edit the current

name

CA-MDF

Channel A Display Mode

FREQ

In channel mode, display the

selected format in display A

NAME

CB-BDF

Channel B Display Mode

FREQ

In channel mode, display the

selected format in display B

NAME

CC-MDF

Channel C Display Mode

FREQ

In channel mode, display the

selected format in display C

NAME

CD-BDF

Channel D Display Mode

FREQ

In channel mode, display the

selected format in display D

NAME

LANGUA

Language

English

Screen prompts display language

Name

Description

Secondary

Notes

Chinese

AUTOLK

Auto Keypad Lock

Keypad Auto Lock Enabled

Off

Keypad Auto Lock Disabled

MAINFC

Main LCD display

foreground color (Text)

Select Color