Powerwerx DB-750X User Manual

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VHF/UHF

Dual Band Commercial Radio

Powerwerx DB-750X

User's Manual

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Powerwerx offers the best in Land Mobile Commercial Communications, featuring rugged mobiles and handhelds at affordable prices. For additional information visit our web site: www.powerwerx.com

NOTE

This commercial mobile radio ships from the manufacturer “Display Locked” per FCC rules.

You must have the RPS-DB750X-USB programming kit to unlock this radio for the rst time of use. If you do not want to purchase this optional software, your radio dealer must rst

unlock this radio before regular use.

When programming this radio for the first time with the optional PC Programming kit, it

is recommended you rst READ the radio with software and then save this le for future reference. In addition, after you READ this radio with software, rst make your programming and frequency changes, then send this edited le back to your mobile radio. Please contact

the dealer you purchased this radio from or Powerwerx should you have any questions.

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Caution

Please observe the following precautions to prevent fire,

personal injury, or transceiver damage:

Do not attempt to program your radio while driving.

Do not place this transceiver in a dusty, humid or wet area.

Do not expose this transceiver to long periods of direct sunlight.

Do not mount this transceiver or remote control head near vehicle heating vents.

Do not transmit in the high power mode for extended periods of time as it may overheat the radio. For longer transmit key downs, it is recommended you use the “MID1” or “MID2” medium power level settings.

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Thank you for choosing this Powerwerx DB-750X Dual-Band

Land Mobile transceiver. This dual-band mobile is built to rugged

commercial radio standards and features 50 Watts power

output on VHF and 40 Watts output on UHF, seven character

alphanumeric display, AM “Air Band” receive, and direct–flow

heavy duty heat sink with thermostatically-controlled cooling fan

designed for years of trouble free operation.

The DB-750X dual-band radio offers four true dual receive

modes: (V+U, V+V, U+U and U+V). For simple operation this

radio also features single display mode to monitor one channel

at a time. The DB-750X includes 750 memory channels, 10

memory banks, full duplex operation, separate volume and

squelch controls, built-in CTCSS/DCS, DTMF signaling and

optional detachable remote front panel for flexible installation.

This dual-band radio is offered as a mobile or can be congured

as a base station using the optional SS-30DV Power Supply and

MBXCOVR Radio Enclosure.

This mobile transceiver includes a variety of features so we

recommend that you review this manual prior to using this radio.

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CONTENTS

New and Innovative Features ...................................................1

Frequency Range ...................................................................1

Supplied Accessories/Optional Accessories ..........................2

Supplied Accessories ..............................................................2

Optional Accessories ..............................................................2

Initial Installation .......................................................................3

Mobile Installation ...................................................................3

DC Power Cable Connection ..................................................4

Antenna Connection ...............................................................6

Accessories Connections ........................................................7

Getting Acquainted ...................................................................8

Front Panel .............................................................................8

Rear Panel ..............................................................................9

Display ....................................................................................9

Microphone ...........................................................................10

Basic Operations ..................................................................... 11

Switching the Power On/Off .................................................. 11

Adjusting the Volume ...........................................................11

Switch Between VFO and Channel Mode .............................11

Adjusting Frequency .............................................................11

Adjusting Channel ................................................................. 11

Switch Between Main Band and Sub Band ..........................12

Selecting the Frequency Band ..............................................12

Receiving ..............................................................................12

Squelch Off/Squelch Off Momentary.....................................12

Transmitting ..........................................................................12

Shortcut Operations ................................................................13

Squelch Level Setup .............................................................13

Transmit DTMF / 2-Tone / 5-Tone Signaling .........................13

High/Mid/Low Power Switch .................................................13

Frequency Reverse ...............................................................13

Bandwidth Selection .............................................................13

Home Channel ......................................................................13

Hyper Memory Channel ........................................................13

Dual Watch............................................................................14

Emergency Alarm ..................................................................14

Memory Channel/Frequency Scan .......................................14

Memory Channel Scan Skip .................................................14

Memory Channel Add ...........................................................14

Scan Range Limit .................................................................14

Memory Channel Copy .........................................................14

Memory Channel Delete .......................................................15

General Setting ........................................................................16

APO (Automatic Power Off) ..................................................16

Automatic Offset ...................................................................16

Frequency Channel Step Setup ............................................16

VFO Band Lockout ................................................................17

Beep Function .......................................................................17

CPU Clock Frequency Change .............................................17

2-Tone Encode Select ........................................................... 17

5-Tone Encode Select ........................................................... 18

Additional Signaling Feature .................................................18

CTCSS Encode Setup .........................................................18

CTCSS Decode Setup ..........................................................19

Sub Band Display Setup .......................................................19

DTMF Encode Pre-Loading Time .........................................19

DTMF Encode Transmitting Time .........................................20

DTMF Encode Setup ............................................................20

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Squelch Mode Setup .............................................................20

Compander ...........................................................................21

Scrambler Setup ...................................................................21

Tone Burst ............................................................................ 21

Keypad Mode Setup .............................................................22

Keypad Lockout ....................................................................23

TX OFF (PTT Lockout) .........................................................23

Squelch Level Setup .............................................................23

Frequency Reverse ...............................................................23

Sub Band Mute Setup ...........................................................24

Editing Channel Name ..........................................................24

Channel Function Auto Storage Setup ..................................24

Microphone PA, PB, PC, PD Key Setup ...............................25

RF Squelch Level Setup .......................................................25

Offset Direction Setup ...........................................................25

Scan Dwell Time Setup .........................................................25

Priority Channel Scan ...........................................................26

Offset Frequency Setup ........................................................26

Display Mode Setup ..............................................................26

Busy Channel Lockout ..........................................................27

Radio's DTMF Self ID Enquiry ..............................................27

5-Tone Self ID Enquiry .......................................................... 27

TOT (Time-Out Timer) ...........................................................27

VFO Frequency Linkage .......................................................28

Wide/Narrow Band ................................................................28

Cross Band Repeat ...............................................................28

LCD Backlight .......................................................................28

Keypad Backlight Brightness ................................................29

Calling Record ......................................................................29

AM Function ..........................................................................29

Automatic AM Function .........................................................29

External Speaker Port ...........................................................29

Beep Volume Control ...........................................................30

Talk Around........................................................................... 30

Microphone Speaker .............................................................30

Password Function ...............................................................30

Microphone Operation ............................................................31

Send DTMF Signaling ...........................................................31

Main/Sub Band Switching .....................................................31

Function Operation through PA-PD Keys .............................31

Memory Banks .........................................................................33

Assigning Memory Bank to a Channel ..................................33

Choosing Active Bank ...........................................................33

Bank Linking .........................................................................33

Cable Clone ..............................................................................34

Reset to Factory Default .......................................................34

Maintenance .............................................................................35

Default Value for Factory Resume ........................................35

Trouble Shooting ...................................................................35

Specications ..........................................................................36

Attached Chart .........................................................................37

51 groups CTCSS Tone Frequency (Hz) ..............................37

1024 groups DCS Code ........................................................37

Menu Quick Reference List ....................................................39

CONTENTS

DB-750X

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DB-750X FEATURES:

• 750 Memory Channels

• 10 Memory Banks (with bank linking)

• 7 Character Alphanumeric Display

• Power Output: VHF 50 Watts, UHF 40 Watts (4 power levels available for each band)

• Dual Receive Operation (V+U, V+V, U+U, U+V) with separate volume controls

• Narrow Band (2.5 kHz) operation for Land Mobile frequencies (FCC part 90)

• Wide Band (5.0 kHz) operation for Amateur frequencies

• Dual or Single Display / Receive Modes

• Large LCD Display with adjustable Colors and Brightness

• Built-in CTCSS/DCS per channel

• PC programmable with RPS-DB750X-USB Programming Kit

• Base Station Operation w/ optional Power Supply (SS-30DV) and optional Radio Enclosure (MBXCOVR)

Frequency Range

RX: 108~136 MHz AM TX: 136~143.995 MHz FM Narrow

136~174 MHz FM Wide or FM Narrow 144~147.995 MHz FM Wide

220~260 MHz FM Wide 148.000~174 MHz FM Narrow

350~490 MHz FM Wide or FM Narrow 400~429.995 MHz FM Narrow

430~449.995 MHz FM Wide

450~469.995 MHz FM Narrow

470~490 MHz FM Wide

Features

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DB-750X

Supplied Accessories/Optional Accessories

SUPPLIED ACCESSORIES

OPTIONAL ACCESSORIES

After carefully unpacking the transceiver, identify the items listed in the table below. We suggest you keep the box and packaging.

Transceiver

Spare Fuses

(15 A)

User Manual

Front Panel Remote Kit (MBXRMK)

Dual Band Mobile Mag

Mount Antenna (MBXGAIN)

Mobile Mounting

Bracket (MBXBRKT)

DC Power Cable with

Fuse Holder

(OEM-FM-CAB)

Microphone with DTMF

Keypad (MBXDTMF)

Plain Microphone (MBXMIC)

S-Washer

4pcs

Hardware Kit for Bracket

Black screws

(M4X8mm)

4pcs

Tapping screws

(M5X8mm)

4pcs

Programming Kit

(RPS-DB750X-USB)

Cigarette Lighter Plug Connection - 6 Feet (TMCG-72)

Desktop Microphone

(MBXDESK)

Power supply (SS-30DV)

External Speaker (MBXSPK)

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MIC

A/B

MAIN

Base Station Radio

Enclosure (MBXCOVR)

Includes Power Adapter (MBXRPA)

Power Line Filter

(LF-1-OEM)

Y Cable (MBXYCBL)

Clone Cable

(MBXCLON)

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Power Adapter (MBXRPA)

For a complete listing of current accessories see: www.powerwerx.com/mobile

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MOBILE INSTALLATION

To install the transceiver, select a safe, convenient location inside your vehicle that minimizes danger to your passengers and yourself while the vehicle is in motion. Consider installing the unit at an appropriate position so that knees or legs will not strike it during sudden braking of your vehicle. Try to pick a well ventilated location that is shielded from direct sunlight.

Install the mounting bracket in the vehicle using the supplied self-

tapping screws (4pcs) and at washers (4pcs).

Position the transceiver, then insert and tighten the supplied hexagon

SEMS screws.

Car body

Mounting bracket

Washer (M5)

Tapping screw

(M5X20mm)

• Double check that all screws are tightened to prevent vehicle vibration from loosening the bracket or transceiver.

Initial Installation

• Determine the appropriate angle of the transceiver, using the 3 screw hole positions on the side of the mounting bracket.

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DB-750X

Initial Installation

DC POWER CABLE CONNECTION

For best operation, connect directly to vehicle battery.

MOBILE OPERATION

The vehicle battery voltage must be between 11.5 ~ 14.5 Volts DC. Be sure to use a battery that has sufficient current capacity. If the current to the transceiver is insufficient, the display may darken during transmission, or transmitting output power may drop excessively.

Route the DC power cable supplied with the transceiver directly to the vehicle's battery terminals using the shortest path from the transceiver.

If using the supplied power cable make sure the entire length of the cable is dressed so it is isolated from heat, moisture, and the engine high voltage ignition system.

If using the optional Powerwerx TMCG-72 cigarette lighter plug make sure your cigarette lighter socket in your vehicle can handle

12 VDC @ 12 Amps.

• Conrm the correct polarity of the connections, then attach

the power cable to the battery terminals; red connects to the positive (+) terminal and black connects to the negative (-) terminal.

• Use the length of cable nessary to reach your battery. In particular, never remove the fuse holders from the cable.

Reconnect any wiring removed from the negative terminal.

Connect the DC power cable to the transceiver's power supply connector.

• Press the connectors rmly together until the locking tab clicks.

Red

Black

DC power cable

NOTE

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Initial Installation

• Do not directly connect the transceiver to an AC outlet.

• Use the optional DC Power Adapter (MBXRPA) to connect

the transceiver to a regulated power supply.

• Do not substitute a cable with smaller gauge wires.

BASE STATION OPERATION

In order to use this transceiver for fixed base station operation,

you will need an optional SS-30DV DC power supply and optional

Base Station Enclosure (not included). Please contact your local

dealer for these items.

 Before connecting the DC power to the transceiver, be sure to

switch the transceiver and the DC Power Supply OFF.

 Do not plug the DC Power Supply into an AC outlet until you

make all connections.

Power Supply (SS-30DV)

DC Power Adapter (MBXRPA)

Power Supply (SS-30DV)

Connect the optional DC Power Adapter (MBXRPA) to the

regulated DC Power Supply and ensure that the polarities are correct. (Red: positive, Black: negative).

Connect the transceiver's DC power connector to

the connector on the DC Power Adapter (MBXRPA).

Press the connectors rmly together until the locking tab clicks.

NOTE

Red

Black

Base Station Radio

Enclosure (MBXCOVR)

Includes Power Adapter (MBXRPA)

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DB-750X

If the fuse blows, determine the cause, then correct the problem.

After the problem is resolved, replace the fuse. If newly installed

fuses continue to blow, disconnect the power cable and contact your authorized dealer or an authorized service center for assistance.

Only use fuses of the specified type and rating, otherwise the

transceiver could be damaged.

Before operating, install an efcient, well-tuned antenna. The success

of your installation will depend largely on the type of antenna and its correct installation. The transceiver can give excellent results if the antenna system and its installation are given careful attention.

Use a 50 Ω impedance antenna and low-loss coaxial feed-line that

has a characteristic impedance of 50 Ω, to match the transceiver input

impedance. Coupling the antenna to the transceiver via feed-lines having

The possible locations of an antenna on a car are shown as follows:

Initial Installation

REPLACING FUSES

If you use the transceiver for a long period when the vehicle battery is not fully charged, or when the engine is OFF, the battery may become

discharged, and will not have sufcient reserves to start the vehicle. Avoid

using the transceiver in these conditions.

• Transmitting without first connecting an antenna or other

matched load may damage the transceiver. Always connect

the antenna to the transceiver before transmitting.

• All xed stations should be equipped with a lightning arrester to

reduce the risk of re, electric shock, and transceiver damage.

Fuse Location Fuse Current Rating

Transceiver 15 A

Supplied accessory DC

Power Cable

20 A

ANTENNA CONNECTION

an impedance other than 50 Ω reduces the efficiency of the antenna

system and can cause interference to nearby broadcast television receivers, radio receivers, and other electronic equipment.

NOTE

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If you plan to use the optional external speaker/s (MBXSPK), there are two options. For a single speaker, plug into the upper 3.5 mm SP jack on the rear of the radio to hear both bands through one speaker. To use dual speakers, use the optional Y cable (MBXYCBL) and plug it into the lower 3.5 mm ST jack on the rear of the radio to split the left and right bands between the two speakers. See page 29 for programming this function.

For voice communications, connect a microphone equipped with

an 8-pin modular plug into the modular socket on the right side of

the control head. Press rmly on the plug until the locking tab clicks. Attach the supplied microphone hanger in an appropriate location

using the screws included in the screw set.

When programming this radio for the first time with the optional

PC Programming Kit, RPS-DB750X-USB, it is recommended you rst

READ this radio with the software and then save the le for future

reference. In addition, after you READ this radio with the software,

make your programming and frequency changes, then send this

program back to your mobile radio.

Initial Installation

EXTERNAL SPEAKER

MICROPHONE

PC SOFTWARE PROGRAMMING

Ask your dealer about purchasing a Programming Kit: RPS-DB750X-USB.

ACCESSORIES CONNECTIONS

External Dual Speakers

(Use optional audio Y cable)

Microphone (MBXDTMF)

Antenna (MBXGAIN)

NOTE

Microphone connector

�

MIC

A/B

MAIN

Speaker (MBXSPK)

Audio Y Cable

(MBXYCBL)

External

Single Speaker

External Speaker

(MBXSPK)

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DB-750X

• Basic Functions

NO. KEY FUNCTION

1 Left Dial Knob

Rotate it to choose frequency /channel. Press it to set the left band as "Main Band"; In VFO mode, press it to choose the frequency band;

In function setup as conrm key; in scan mode,

rotate it to change scan direction

2 Right Dial Knob

Rotate it to choose frequency /channel. Press it to set the right band as "Main Band"; In VFO mode, press it to choose the frequency band;

In function setup as conrm key; in scan mode,

rotate it to change scan direction

3 Left Volume Knob Adjust left band volume level.

4 Right Volume Knob Adjust right band volume level.

5 Squelch

Press this key and hold to adjust squelch while either turning left dial knob or right dial knob

Getting Acquainted

FRONT PANEL

6 Function set Key

In standby, press this key to enter function menu

Press it to power On /Off the transceiver

8 Bottom

[

LOW] Key

In standby press it to change H/L power for left band channel. Long press it to turn On/Off Frequency Reverse

Function

9 Bottom

[

V/M] Key

In standby, press it to switch left band channel mode and VFO mode. Long press it to set Wide/

Narrow band.

10 Bottom

[HM]

Key

In standby, press it to switch left band HOME channel and normal channel. Long press it to enter dual watch of VFO channel and current channel.

11 Bottom

[

SCAN] Key

In standby, press it to start left band channel or frequency scan.In channel mode, hold it to set current channel scan skip.

12 Top

[

LOW] Key

In standby press it to change H/L power for right band channel. Long press it to turn On/Off Frequency Reverse Function

13 Top

[

V/M] Key

In standby, press it to switch

right band

channel

mode and VFO mode. Long press it to set Wide/

Narrow band.

14 Top [HM] Key

In standby, press it to switch

right band

HOME

channel and normal channel. Long press it to enter dual watch of VFO channel and current channel.

15 Top [SCAN] Key

In standby, press it to start

right band

channel or frequency scan.In channel mode, hold it to set current channel scan skip.

16 LCD

For channel, frequency and function display setup.

LOW

VOL

V/M

SCN

SET

MHzREF TONE SUB

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NO. KEY FUNCTION

1 Ext. Power Jack

Not available in US model.

2 Ext. Dual Spkr Port

Terminal for optional dual external speakers.

3 Ext. Single Spkr Port

Terminal for optional single external speaker.

4 Heat-Sink Fan

Runs Automatically when radio temperature rises.

5 Antenna Connector

Connect a 50 Ω antenna.

NO. INDICATOR FUNCTION

Displays the channel number and Menu number.

Appears when current channel is priority channel.

Appears when current channel is set Scan Skip.

Appears when current channel has CTCSS Encode

Appears when current channel has CTCSS Decode

Appears when the Offset function is ON.

Appears while transmitting.

Displays the Main channel.

Displays the operating frequency,channel name.

Displays when receiving a signal or Monitor is ON.

Signal strength for receiving and power level for transmitting.

Appears while in Narrow band.

Appears when mute has been turned ON.

Appears when the DCS function is ON.

Appears while in AM mode.

Appears when the Scrambler function is ON.

Appears when the Compander function is ON.

Appears while using Low output power.

Appears while using Middle output power.

Appears while Auto power off function is ON.

Appears when the Key Lock function is ON.

Appears when press SET key.

Appears when in KEY2 mode.

Appears when cross band repeat function is ON.

Getting Acquainted

REAR PANEL

DISPLAY

4 132

1 1

10 11

12 1213 1314 1415 1616

17 1718 1819 19

2 534 6 7

ST SP ACC

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DB-750X

MIC Connector Diagram (in the front view of connector)

Getting Acquainted

MICROPHONE

Key Pad Serial Data

+5V

DOWN

UP / SPKR AUDIO OUT

MIC GND

MIC

PTT

GND

NO. KEY FUNCTION

1 UP

Increase frequency, channel number or setting value.

2 DOWN

Decrease frequency, channel number or setting value.

3 PTT Press the PTT (Push-To-Talk) key to transmit.

4 Number Key Input VFO frequency or DTMF dial out etc.

5 A/B band Choose left band or right band as Main band

6 Band indicator The indicator light on for Main band.

7 TX/RX indicator

Light green while receiving, Light red while transmitting.

8 MIC Speak here during transmission.

Speaker

Option to hear speaker thru microphone.

7 8

MIC

A/B

MAIN

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In frequency (VFO) mode, turn the selector

knob clockwise to increase frequency;

counterclockwise to decrease frequency. Every

click will increase or decrease frequency by one step. To adjust the Main band frequency, press corresponding selector knob, the left

side of decimal point will ash. In this status,

turn the selector knob to increase or decrease frequency quickly by 1 MHz steps.

ADJUSTING FREQUENCY THROUGH SELECTOR KNOB

INPUT FREQUENCY THROUGH MICROPHONE NUMBER KEY

In standby, press corresponding key to switch between frequency and channel mode; when the transceiver is in channel mode, the LCD will display current channel.

Basic Operations

POWER ON

Press key to switch the transceiver ON, the LCD displays "WELCOME DB-750X", then

displays current frequency or channel.

POWER OFF

Press key for 1 second to switch the transceiver OFF.

Rotate the [VOLUME] knob of selected band clockwise to increase the volume, counterclockwise to decrease the volume.

SWITCHING THE POWER ON/OFF

ADJUSTING THE VOLUME

SWITCH BETWEEN VFO AND CHANNEL MODE

ADJUSTING FREQUENCY

To adjust the volume when no signal is present hold , keep pressing it and adjust the [VOLUME] knob to desired level and release when done.

The microphone [ UP/DOWN ] key is also able to adjust frequency. Pressing

[

UP/DOWN ] key will increase(decrease) the frequency by one

step size. Hold

[

UP/DOWN ] key to adjust the frequency continuously.

When the band lockout function is on, the input or adjusting of frequency is limited to within the current VFO band. The right band is limited to 136-174 MHz and 400-490 MHz.

In VFO mode, you can input the frequency from the microphone

numeric keys. It is invalid to input frequency out of the frequency band.

For example: to input 150.125 MHz, press 1, 5, 0, 1, 2, 5.

to input 152 MHz, press1, 5, 2,

ADJUSTING CHANNEL

ADJUSTING CHANNEL THROUGH SELECTOR KNOB

In channel mode, you can adjust the channel directly by the channel knob. Turn clockwise to increase one channel; turn counterclockwise to decrease one channel.To adjust the main band channel, press

NOTE

Decrease frequency

Increase frequency

VOL

SCN

VOL

SCN

Min

Volume

Max

Volume

VOL

SCN

Power

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DB-750X

SWITCH BETWEEN MAIN BAND AND SUB BAND

SELECTING THE FREQUENCY BAND

If there is any empty channel, the adjustment will ignore it and jump to next channel.

This transceiver can be set to RX/TX on 2 UHF bands or 2 VHF bands.

INPUT CHANNEL THROUGH MICROPHONE NUMBER KEY

In channel mode, you can switch to desired channel by pressing three of the microphone numeric keys (001-758). For example, input 001 for channel 1; input 030 for channel 30; input 512 for channel 512. If the input channel is not programmed with frequency, the transceiver will emit a warning beep and return to last channel.

This transceiver by default shows dual

receive. A "MAIN" icon will display in the top

right of the working frequency. Transmitting is only available on the main band. When the left band is main band, pressing the right selector knob will switch the right band to main band. Pressing the left selector knob will switch the left band to main band.

1. Left band VFO: press the bottom

key to switch it to VFO mode, press the left selector knob over one second, then repeat above operation to switch the left band between 108~180 MHz (RX: 108-174 MHz, TX: 136-174 MHz), 220~260 MHz (RX only), 350~399.995 MHz (RX only) or 400~490 MHz.

2. Right band VFO: press the top

key to switch it to VFO mode; press the right selector knob over one second, then repeat above operation to switch the right band between 136-174MHz, 400~490MHz.

Basic Operations

RECEIVING

If the transceiver has been set at a higher squelch level, it may fail to hear the weaker stations. If the

“BUSY”

and signal strength icon display in left band or right band, but no station is heard, read just the squelch level to above threshold.

In standby, both left band and right band are able to receive. When they receive any signal, the “BUSY” icon and signal strength icon will appear in the corresponding

area of the LCD, and you will hear the audio.

SQUELCH OFF/SQUELCH OFF MOMENTARY

Long press of key can be programmed as Squelch Off or Squelch Off Momentary to monitor the weak signal.

1. Squelch Off: Hold key until you hear a beep; the squelch is off.

Repeat the above operation to resume squelch.

2. Squelch Off Momentary: Hold key to disable squelch; release the

key to resume squelch.

TRANSMITTING

Hold “PTT” key; the transceiver will transmit. Hold the microphone approximately 2~5 inches from your mouth, and then speak into the microphone in your normal voice to get best results.

Transmitting is only available on the main band, the “TX” icon will display in the top right corner of the main band frequency

In standby, press the microphone to cancel squelch; press it again to

turn on the squelch.

corresponding selector knob. The channel number flashes in this situation; the channel number will increase 10 channels by each click of selector knob. Press microphone [ UP/DOWN ] key also to adjust the channel.

NOTE

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Shortcut Operations

SQUELCH LEVEL SETUP

This function is used to setup the level of receiving signals. When the

signal strength reaches a certain level, it will unmute the transceiver.

In standby, press and hold

key; meanwhile turn the selector knob

to adjust the squelch level of Main band.

1-20: 20 squelch levels are available.

OFF: turn off squelch. The background noise will remain on.

The squelch level setup is for right band and left band separately.

TRANSMIT DTMF/2 TONE/5 TONE SIGNALING

If the current channel is programmed with DTMF / 2-Tone / 5-Tone signaling, hold PTT and [ UP ] key will transmit selected preprogrammed signaling.

HIGH/MID/LOW TRANSMIT POWER SWITCH

In standby, repeatedly press key to choose power levels as follows:

When LCD displays HIGH, the power for current channel is high.

When LCD displays MID1, the power for current channel is middle 1

When LCD displays MID2, the power for current channel is middle 2.

When LCD displays LOW, the power for current channel is low.

Output power for each level:

HIGH MID1 MID2 LOW

VHF (50 W) VHF (20 W) VHF (10 W) VHF (5 W)

UHF (40 W) UHF (25 W) UHF (10 W) UHF (5 W)

In channel mode, this operation is for temporary use only

This function is valid only when current channel is programmed with repeater offset frequency and offset direction

In standby, press key to switch to HOME

channel, and communicate on HOME channel.

Repeatedly press it to return to last channel.

In standby, hold

key for one second to turn On/Off frequency reverse function. When reverse function is on, the TX frequency will change to RX frequency and RX frequency will change to TX frequency.

The signaling will also be reversed for CTCSS/DCS signaling set in this

channel.

HOME CHANNEL

FREQUENCY REVERSE

This transceiver has three bandwidths. Select suitable bandwidth in

accordance with different local conditions.

In standby, hold

key for one second to choose the three bandwidths. When LCD displays WIDE, current channel is working on wide band 25 kHz. When LCD displays MIDDLE, current channel is working on middle band 20 kHz. When LCD displays NARROW, current channel is working

on narrow band 12.5 kHz. Per FCC Rules, in North America wide band

and narrow band is used. See top of page 36 for band plan.

BANDWIDTH SELECTION

NOTE

HYPER MEMORY CHANNEL

In standby, press the left or right volume knob to switch the radio to work on hyper channel 1 or hyper channel 2.

Page 19

DB-750X

Shortcut Operations

In standby, hold key for one second to enter Dual Watch mode. The radio will scan the channel every 5 seconds. When the radio receives a matching signal, it pauses scanning until the signal disappears. Repeat above operation to exit dual watch.

DUAL WATCH

FREQUENCY SCAN

MEMORY CHANNEL/FREQUENCY SCAN

In VFO mode, this function is designed to monitor signals at every "step size" you have set.

In VFO mode, press the main band key to enter channel scan.

During the scanning, adjust the main band selector knob or press the microphone

[ UP/DOWN ] key to change the scan direction.

Press key to exit scan.

MEMORY CHANNEL SCAN

In channel mode, press the main band key to enter channel scan.

During the scanning, adjust the main band selector knob or press microphone [ UP/DOWN ] key to change the scan direction.

Press key to exit scan.

In channel mode, switch selector knob to choose the channel, then

In VFO mode, turn selector knob to select the desired frequency or input frequency by microphone numeric keypad. Set offset and CTCSS/DCS tones.

Hold key until the transceiver beeps and the channel number

ashes.

Turn selector knob to select the channel number to store. (If the storage has data, the LCD will display the frequency, otherwise will display "----------")

Press key. The LCD will display MEN- IN, and channel edit is completed.

In channel mode, turn the selector knob to choose the channel.

Hold key until the transceiver beeps and channel number

ashes.

Turn selector knob to choose channel number for storage. (If the

MEMORY CHANNEL SCAN SKIP

MEMORY CHANNEL ADD

MEMORY CHANNEL COPY

EMERGENCY ALARM

To start emergency alarm, hold the right volume knob until the trans

-ceiver displays ALARM and emits an alarm. Re-power on the transceiver to exit alarm. This transceiver has four kinds of alarm which can be setup by programming software.

hold for one second. The radio will beep twice and the LCD will display "SKIP"; now the current channel will be skipped during scan.

SCAN RANGE LIMIT

Choose upper limit and lower limit frequency. Five pairs (L1 / U1 - L5 / U5) may be selected. L stands for lower the limit and U stands for the upper limit. the upper limit must be higher than the lower limit frequency. Please refer to the Channel

Edit to setup the limit frequency.

In VFO mode, set the VFO frequency in the range between upper and lower limit.

Press key to start scan in lmited range.

You can set the VFO scan frequency range with this function:

Page 20

Shortcut Operations

In standby, hold key until the transceiver beeps, and channel number

ashes.

Turn selector knob to choose channel number for delete. (If the storage has data, the LCD will display the frequency, otherwise will display"----------")

Hold main band volume knob until the transceiver beeps twice and LCD displays MEN-OUT. Channel delete was completed.

MEMORY CHANNEL DELETE

storage has data , the LCD will display the frequency, otherwise will display"----------")

Press key. The LCD will display MEN-IN, and channel copy was completed.

Page 21

DB-750X

General Setting

Once APO is activated, the transceiver will automatically switch off

when the pre-set timer runs out.

Press key to enter function menu.

Turn the main band selector knob to choose No. 01 menu. The LCD displays "APO"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to

choose desired value. Available values:

0.5-12 hours, OFF

Press the main band selector knob or key to store value and return to function menu.

Press

key or hold selector knob for one second to store setup

and exit.

Only in frequency (VFO) mode, this function is valid. Turn selector knob to select frequency or frequency scanning which is restricted by frequency step size.

Press key to enter function menu.

Turn the main band selector knob to choose No. 03 menu. the LCD displays "STEP"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

Available Values:

2.5 kHz, 5 kHz, 6.25 kHz,

10 kHz, 12.5 kHz, 15 kHz, 20 kHz, 25 kHz, 30 kHz, 50 kHz

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

When this function is on, the transceiver will automatically transmit with

RX frequency ± offset frequency. The operation is as follows:

Press key to enter function menu.

APO (AUTOMATIC POWER OFF)

FREQUENCY CHANNEL STEP SETUP

AUTOMATIC OFFSET

Turn the main band selector knob to choose No. 02 menu. The LCD

displays "ARS"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to desired wanted value.

ON: Auto Offset function is turned on.

OFF: Auto Offset function is turned off.

Press the Main band selector knob or key to store value and return to function menu.

Press

key or hold selector knob for 1 second to store setup and

exit.

When the automatic offset is ON, the offset for 136-174 MHz is default on

0.6 MHz, and for 400-490 MHz is default on 5 MHz.

NOTE

Basic operation steps for function menu

Press key to enter function menu.

Turn the main band selector knob to choose desired function.

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

Press the main band selector knob to store value and back to function menu. Press

key or hold selector knob for over one

second to store setup and exit.

Page 22

General Setting

In VFO mode, when this function is on, the scanning or input of

frequency will be restricted within the current VFO frequency band.

Press key to enter function menu.

Turn the main band selector knob to choose No. 04 menu. The LCD displays "BAND"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

ON: Turn on VFO band lockout function

OFF: Turn off VFO band lockout function

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 05 menu. The LCD displays "BEEP"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose wanted value.

ON: Turn on Beep function.

OFF: Turn off Beep function

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for

one second to store setup and exit.

When any harmonic or image frequency in the CPU clock disturbs the working frequency, turn on this function to cut the image channel noise.

Press key to enter function menu.

Turn the main band selector knob to choose No. 06 menu. The LCD displays "CLK.SFT"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

ON: Turn on CPU clock frequency change

OFF: Turn off CPU clock frequency change

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 07 menu. The LCD displays "2TN ENC"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

Available Values: 0-23, total 24 groups.

VFO BAND LOCKOUT

BEEP FUNCTION

CPU CLOCK FREQUENCY CHANGE

2 TONE ENCODE SELECT

This function is auto-hidden in channel mode

if 2-Tone encode is programmed with name, the LCD will display corresponding name.

After choosing the 2-Tone encode group, pressing PTT will transmit

selected code.

Press the main band selector knob or key to store value and back to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

NOTE

Page 23

DB-750X

General Setting

Press key to enter function menu.

Turn the main band selector knob to choose No. 08 menu. The LCD displays "5TN ENC"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value. Available Values: 0-99, total 100 groups.

This transceiver has three optional signaling functions: DTMF / 5-Tone / 2-Tone. These signaling functions are similar to CTCSS/DCS signaling. When the receiver adds optional signaling, the caller shall transmit matching signaling. DTMF and 5-Tone signaling can be applied for other

advanced features such as ANI, PTT ID, group call, select call, etc.

Press key to enter function menu.

Turn the main band selector knob to choose No. 09 menu. The LCD

displays "TON DEC"

Press the main band selector knob to enter function setup.

Press key to enter function menu.

Switch the main band selector knob to choose No. 10 menu. The LCD displays "TX CDCS"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value

OFF: Turn off CTCSS/DCS encode.

CTCSS: Choose CTCSS encode.

DCS: Choose DCS encode.

Press the main band selector knob to enter the menu.

Switch the main band selector knob to choose desired CTCSS, DCS code.

CTCSS: 62.5 - 254.1 Hz, and one self-

dened group, total 52 groups DCS: 000N-777I, total 1024 groups

5 TONE ENCODE SELECT

ADDITIONAL SIGNALING FEATURE

CTCSS/DCS ENCODE SETUP

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

if 5-Tone encode is programmed with name, the LCD will display corresponding name.

After choosing the 5-Tone encode group, pressing PTT will transmit

selected code.

Additional signaling shall work associated with the squelch mode setup.

(Refer to Squelch Mode setup on page 20)

Switch the main band selector knob to choose desired value

DT: means DTMF signaling is added.

2T: means DTMF signaling is added.

5T: means DTMF signaling is added.

OFF: Turn off optional signaling

Press the main band selector knob or key to store value and return to function menu.Press

key or hold selector knob for 1 second to store

setup and exit.

NOTE

Page 24

General Setting

Press key to enter function menu.

Switch the main band selector knob to choose No. 11 menu. The LCD displays "RX CDCS"

Press the main band selector knob to enter function setup

Switch the main band selector knob to choose desired value

OFF: Turn off CTCSS/DCS decode.

CTCSS: Choose CTCSS decode.

DCS: Choose DCS decode.

Press the main band selector knob to enter the menu.

Switch the main band selector knob to choose desired CTCSS, DCS code.

CTCSS: 62.5 - 254.1 Hz, and one self-

dened group, total 52 groups

DCS: 000N-777I, total 1024 groups

Press the main band selector knob or key to store value and return to function menu. Press

key or

hold selector knob for 1 second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 12 menu. The LCD displays "DSP SUB"

Press the main band selector knob to enter function setup

Switch the main band selector knob to choose desired value.

FREQ: display sub band frequency, DC-IN: display sub band voltage. OFF: turn off display for sub Band

Press the main band selector knob or key to store value and return to function

menu. Press

key or hold selector

knob for one second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 13 menu. The LCD displays "DTMF D"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

100MS: The pre-loading time is 100ms 300MS: The pre-loading time is 300ms 500MS: The pre-loading time is 500ms 800MS: The pre-loading time is 800ms 1000MS: The pre-loading time is 1000ms

Press the main band selector knob or key to store value and back to function menu. Press

key or hold selector knob for one

second to store setup and exit.

CTCSS/DCS DECODE SETUP

SUB BAND DISPLAY SETUP

DTMF ENCODE PRE-LOADING TIME

CTCSS/DCS decode works in conjunction with squelch mode setup. (Refer to Squelch Mode setup on page 20)

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

NOTE

Page 25

DB-750X

General Setting

Press key to enter function menu.

Turn the main band selector knob to choose No. 14 menu. The LCD displays "DTMF S"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

30MS: The time to transmit a single DTMF encode and the interval is 30ms,

50MS: The time to transmit a single DTMF encode and the interval is 50ms,

80MS: The time to transmit a single DTMF encode and the interval is 80ms,

100MS: The time to transmit a single DTMF encode and the interval is 100ms,

150MS: The time to transmit a single DTMF encode and the interval is 150ms,

200MS: The time to transmit a single DTMF encode and the interval is 200ms,

250MS: The time to transmit a single DTMF encode and the interval is 250ms,

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one second to store

setup and exit.

Press to enter function menu

Switch the main band selector knob to

choose No. 15 menu. The LCD displays DTMF W

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose DTMF group. Then press

key back to DTMF menu. Press

PTT to transmit with selected DTMF code.

06-16: total 16 group of DTMF code.

DTMF ENCODE TRANSMITTING TIME

DTMF ENCODE SETUP

When the selected group is empty, the LCD displays "------"

Press the selector knob to enter the DTMF signaling edit. The LCD

displays "-- -- -- -- -- --", and the last character ashes.

Switch the selector knob to choose desired character. Press the selector knob to confirm selected value and start edit for next character.

Press key to store value and exit code editing. Press key again to store setup and exit. Press

key or hold selector knob for

1 second to store setup and exit.

This transceiver has ve squelch modes available to prevent reception

of certain unwanted signal.

Press key to enter function menu.

Turn the main band selector knob to

choose No. 16 menu. The LCD displays

"SGN SQL"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value

SQ: Receives when carrier is detected.

CTSS/DCS: Receives when carrier and CTCSS/DCS code are

detected.

TONE: Receives when carrier + optional signaling are detected.

CT*TO: Receives when carrier + CTCSS/

DCS + optional signaling are detected.

CT/TO: Receives when any carrier or CTCSS/DCS or optional

signaling is detected.

SQUELCH MODE SETUP

Page 26

General Setting

Compander function will decrease the background noise and enhance audio clarity, especially in long range communication.

Press key to enter function menu

Turn the main band selector knob to choose No. 17 menu. The LCD displays "COMP"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired function.

ON: Compander function is turned on

OFF: Compander function is turned off

Press the main band selector knob or key to store value and back to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

Scrambling offers more confidential communications. Radios on the same frequency as the scrambled radio will receive only indistinguishable noise.

This function is used to start a repeater. Certain repeaters require a tone burst to start when dormant. There is no need to send the tone burst again once the repeater is activated.

Press key to enter function menu.

Turn the main band selector knob to choose No. 19 menu. The LCD displays "TBST"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired frequency.

1000: Burst frequency is 1000 Hz.

1450: Burst frequency is 1450 Hz.

1750: Burst frequency is 1750 Hz.

2100: Burst frequency is 2100 Hz.

COMPANDER

SCRAMBLER SETUP

TONE BURST

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

When using compander, to avoid distortion during communications, turn on this function in all system radios.

Only when the transceiver is set with CTCSS/DCS or optional DTMF / 5-Tone / 2-Tone signaling, the values will be available.

This function should not be used on amateur frequencies, as it is illegal per FCC rules.

Press key to enter function menu.

Turn the main band selector knob to choose No. 18 menu. The LCD displays "SCR"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose wanted group

1-9 (nine fixed groups) U1, U2 (two self

dened scrambler groups), OFF.

Press the main band selector knob or key to store value and back to function menu. Press

key or hold selector knob for one

second to store setup and exit.

NOTE

Page 27

DB-750X

General Setting

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

Top short press: In VFO mode, short press this key; the frequency step size changes to 1 MHz. In channel mode, adjust selector knob to jump 10 channels.

Bottom

long press: In standby, long press this key to add/delete optional signaling, repeat the long press to set optional signaling to DTMF, 5-Tone or 2-Tone.

After the above setup, to activate repeater, hold microphone PTT key and

[ DOWN ]

key and the radio will transmit selected tone.

Press key to enter function menu.

Turn the main band selector knob to

choose No. 20 menu. The LCD displays

"KEYMOD"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired mode.

KEY1: Normal mode; the top four keys

have same functions as the buttom four keys.

KEY2: The top four keys are shared by both bands. The bottom four

keys will be re-dened.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

KEYPAD MODE SETUP

LCD display of DT means DTMF; 5T means 5-Tone; 2T means 2-Tone.

Bottom band

long press: Talk Around. When this

function is activated, transceiver does not communicate through the repeater. The transceiver will transmit on the repeater's output frequency with its CTCSS/DCS signaling.

Repeat the operation to turn off Talk Around.

Bottom

short press: Frequency reverse function. When current channel is setup with offset direction and offset frequency, press this key to turn on frequency reverse function. When frequency reverse function is on, the TX frequency changes to the RX frequency and RX frequency changes to the TX frequency. The signaling will also be reversed if CTCSS/DCS signaling existed in this channel. Repeat the short press to turn off frequency reverse.

Bottom

long press: In standby, hold this key until the

LCD displays

, indicating the compander function is on.

Repeat above operation to turn off compander function.

Bottom

short press: In standby, press this key to set

the CTCSS/DCS code for current channel.

When the LCD displays ENC, the current channel is enabled

with CTCSS encode function.

When the LCD displays ENC and DEC, the current channel is

enabled with CTCSS /DCS code function. When the LCD displays DCS and DCS icon, the current

channel is enabled with CTCSS code function. When the LCD displays OFF, the current channels, CTCSS /

DCS function is disabled.

Bottom long press: In standby, long press this key to enter CTCSS/DCS scan. When a matching CTCSS/ DCS signal is detected, the scan will pause according to scan dwell time. The scan direction can be changed by

NOTE

Conguration of keypad in KEY2 mode:

Page 28

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired mode.

BAND R, lock the right band PTT. Only able to transmit on left band.

BAND L, lock the left band PTT. Only able to transmit on right band. BAND BOTH, lock both band PTT. Not able to transmit on any side.

OFF: PTT no lock.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

General Setting

Press key to enter function menu.

Turn the main band selector knob to choose No. 21 menu. The LCD displays "LOCK"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired mode.

ON: The keypad lockout function is turned on. WARNING: All keys and functions of the radio are locked. To exit, either reprogram the radio with software or perform a hard reset. See page 34 for factory reset.

OFF: The keypad lockout function is turned off.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 22 menu. The LCD displays "LOCKT".

Press key to enter function menu.

Turn the main band selector knob to choose No. 23 menu. The LCD displays "SQL".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

1-20: total 20 squelch levels. OFF: Turn off squelch function. The

background noise remains on.

Press the main band selector knob or key to store value. Press

key or hold selector knob for one second to store setup and

exit.

With this function on, the transceiver will transmit on the repeater

output when current channel is programmed with repeater offset.

Press key to enter function menu.

Turn the main band selector knob to

KEYPAD LOCKOUT

TX OFF (PTT LOCKOUT)

SQUELCH LEVEL SETUP

FREQUENCY REVERSE

corresponding channel selector knob. Note:To enable this

function, the channel must be programmed with CTCSS/DCS decode.

Bottom

short press: The sub band will display "MAIN"

and ashes. In this case, you can setup for sub band without

switching between Main band and Sub band.

Bottom

long press: Choose scrambler group for main

band. In standby, hold this key,the LCD displays SCR X and

icon. X stands for the group number. Repeat above

operation to choose desired group.

Page 29

DB-750X

choose No. 24 menu. The LCD displays "REV".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose wanted value.

ON: Frequency reverse is turned on, The TX and RX frequency

will be exchanged. The CTCSS/DCS signaling also will be exchanged if existed in current channel.

OFF: Turn off Frequency Reverse.

Press the main band selector knob or

key to store value and return to function menu. Press key

or hold selector knob for one second to store setup and exit.

To avoid sub band disturbance of the main band, turn on this function.

The RX of the sub band will be muted during RX or TX of the main band.

Press key to enter function menu.

Turn the main band selector knob to

choose No. 25 menu. The LCD displays

"MUTE".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

TX: When the main band is transmitting, the sub band will be muted.

RX: When the main band is receiving, the sub band receiving will be

muted.

RX/TX: the sub band receiving is always

muted.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

General Setting

Press to enter function menu

Turn the main band selector knob to

choose No. 27 menu, The LCD displays "HYPER".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

SUB BAND MUTE SETUP

EDITING CHANNEL NAME

After editing a name for a channel, if the display mode is channel

name, the LCD will display the name edited in this menu. Otherwise it will display the frequency.

Press key to enter function menu.

Switch the selector knob to choose No. 26

function menu. The LCD displays "NAME C".

Press the main band selector knob to enter function setup.

Switch the selector knob to choose desired character.

Press the selector knob to conrm current character and to edit next character. After editing all seven characters, press the selector knob to conrm and return to function menu.

If the editing does not reach seven characters, press key to return to function menu, then press

key or hold selector knob for

one second to store setup and exit.

CHANNEL FUNCTION AUTO STORAGE SETUP

This function stores current conguration for each channel.

When this function is on, the temporary configuration for the current channel will be stored, even if the channel is changed or the radio is

powered off. When this function is off, the temporary conguration will

not be stored. The channel information will be restored to the last stored value after changing the channel or after the radio is powered off.

Page 30

Press key to enter function menu.

Turn the main band selector knob to

choose No. 28-31 menu. The LCD

displays "PG PA" PG PB, PG PC, PG PD.

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

Press the main band selector knob or key to store value and

return to function menu. Press key or hold selector knob for one second to store setup and exit.

MICROPHONE PA, PB, PC, PD KEY SETUP

For Menu details, please refer to Page 31-32, Microphone Operation.

NOTE

General Setting

Press key to enter function menu.

Turn the main band selector knob to

Press key to enter function menu.

Turn the main band selector knob to

choose No. 34 menu. The LCD displays

"SCAN".

Press the main band selector knob to enter function setup.

RF SQUELCH LEVEL SETUP

REPEATER OFFSET DIRECTION SETUP

SCAN DWELL TIME SETUP

When squelch level function is on, you can cancel squelch only when

the signal strength reaches the level setup by users.

Press key to enter function menu.

Turn the main band selector knob to choose No. 32 menu. The LCD

displays "RF SQL".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

S-2: Able to hear a signal when the level meter reaches 1 bar.

choose No. 33 menu. The LCD displays "RPT MOD"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired offset direction.

-: Minus offset, transmitting frequency is lower than receiving frequency. +: Plus offset, transmitting frequency is higher than receiving frequency.

OFF: OFFSET is turned off. Transmitting

frequency is same as receiving frequency.

Press the main band selector knob or key to store value and return to function menu. Press

key or

hold selector knob for 1 second to store setup and exit.

MANUAL: Auto storage is turned off. AUTO: Auto storage is turned on.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

S-5: Able to hear a signal when the level meter reaches 4 bars. S-9: Able to hear a signal when the level meter reaches 8 bars. S-FULL: Able to hear a signal when the level meter reaches full bars.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector

knob for one second to store setup and exit.

Page 31

DB-750X

General Setting

Press key to enter function menu.

Turn the main band selector knob to choose No. 36 menu. The LCD displays "SHIFT".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

Available offset frequency for this transceiver is 0-100 MHz.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 37 menu. The LCD displays "DISPLAY".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

FREQ: The radio displays channel number

+ frequency in channel mode. Press

key to change to VFO

mode.

CH:

Displays only channel number.

NAME:

In channel mode, it displays the channel number and channel name if the current channel is programmed with a name. Otherwise, it display the channel number

and frequency. Press

key to change to VFO mode.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

OFFSET FREQUENCY SETUP

DISPLAY MODE SETUP

Before using the priority channel scan function, the edited channel must be

programmed as "P SCAN".

Press key to enter function menu.

Turn the main band selector knob to choose No. 35 menu. The LCD displays "SCAN M".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

MEN: Channel Scan; the transceiver will scan all the channels.

MSN: Priority Channel Scaning; the transceiver will only scan the priority channel.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

PRIORITY CHANNEL SCAN

Switch the Main band selector knob to choose desired value.

TIME: it pauses five seconds after detecting a matching signal, then resumes scan.

BUSY: it pauses after scanning a matching signal, then resumes scan after the signal disappears for 2 seconds.

SECEDE: It Stops after scanning a matching signal, and exits scan.

Press the Main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

NOTE

Page 32

With this function on, the transceiver will not transmit on a busy channel, to avoid disturbing other transceivers using same frequency. If the channel is busy and you press PTT, the transceiver will beep as warning and return to receiving.

Press key to enter function menu.

Turn the main band selector knob to choose No. 38 menu. The LCD displays "REPLOCK".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value. RLORP: Signaling busy lockout; transmitting is inhibited when current

channel receives a matching carrier but non-matching CTCSS/ DCS.

RLOBU: Channel busy lockout; transmitting

is inhibited when current channel receives a matching carrier;

OFF: Busy channel lockout is disabled.

Transmitting is allowed in any receiving status.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for

onesecond to store setup and exit.

BUSY CHANNEL LOCKOUT

RADIO'S DTMF SELF ID ENQUIRY

General Setting

Press key to enter function menu.

Switch the selector knob to choose No. 40

function. The LCD displays "5TON ID".

Press the main band selector knob to enter function setup. The LCD will show the DTMF self ID.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

The time-out timer limits the amount of continuous transmitting time.

When transmitting reaches the time limit that has been programmed,

the transmission will be cut off and will emit a warning beep.

Press key to enter function menu.

Turn the main band selector knob to choose No. 41 menu. The LCD displays "TOT".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

1-30 MIN, total 30 levels.

OFF: TOT is disabled.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

5 TONE SELF ID ENQUIRY

TOT (TIME-OUT TIMER)

Press key to enter function menu.

Switch the selector knob to choose No. 39

function. The LCD displays "DTMF ID".

Press the main band selector knob to enter function setup. The LCD will show the DTMF self ID.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

Page 33

DB-750X

General Setting

Set the left band and right band as VHF (136-174 MHz) and UHF (400-470 MHz), then turn on this function to enable Cross Band Repeat. CAUTION: DO NOT EXCEED MID2 (10 WATT)

POWER LEVEL, AS THIS WILL VOID YOUR WARRANTY.

Press key to enter function menu.

Switch the selector knob to choose No. 44

function. The LCD displays "X-RPT".

Press the main band selector knob. The LCD displays "XSTART".

Press the main band selector knob, the radio beeps and the LCD displays "RPT". The cross band repeat function is on.

Press key to enter function menu.

Turn the main band selector knob to choose No. 45-47 menu. The

LCD displays "COL RED","COL GRN","COL BLU"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to

choose desired value.Each color (red,

green, blue) has 32 brightness levels.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one second to store setup and exit.

CROSS BAND REPEAT

LCD BACKLIGHT

Press key to enter function menu.

Turn the main band selector knob to

choose No. 43 menu. The LCD displays "WIDNAR".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

WIDE: Wide band (25 kHz)

MIDDLE: Middle band (20 kHz) NARROW: Narrow band (12.5 kHz)

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector

knob for one second to store setup and exit. Refer to Wide/Narrow

table in appendix.

WIDE/NARROW BAND

This function is only valid when both bands are on VFO mode.

Press

to turn off cross band function.

NOTE

Enable this function to adjust VFO frequency, will bring same frequency

simultaneously for both bands. Adjust one knob, and the frequency for

both bands will increase or decrease one step size value.

Press key to enter function menu.

Turn the Main band selector knob to choose No. 42 menu. The LCD displays "VFOTR".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

Available values: ON, OFF.

Press the main band selector knob or key to store value and return to function menu. Press

key or

hold selector knob for one second to store setup and exit.

VFO FREQUENCY LINKAGE

Page 34

The transceiver offers enquiry of calling record.

Press key to enter function menu.

Turn the main band selector knob to choose No. 49 menu. The LCD displays "NOTE".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value. This transceiver is able to record 16 calls at most.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector

knob for one second to store setup and exit.

CALLING RECORD

Press key to enter function menu.

Turn the main band selector knob to choose No. 50 menu. The LCD displays "AM".

AM FUNCTION

This function is only valid when the main band frequency is VHF 108-

180 MHz on the left band. Right band will not receive AM.

NOTE

AUTOMATIC AM FUNCTION

To enable automatic AM function, the AM function must be turned on rst.

The radio will automatically receive AM mode when the VHF frequency

is under 136 MHz

Press key to enter function menu.

Turn the main band selector knob to choose No. 51 menu. The LCD displays "AUT AM".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

ON: turn on auto AM function.

OFF: turn off auto AM function.

Press the main band selector knob or key to store value and back to function menu. Press

key or hold selector knob for one

second to store setup and exit.

NOTE

General Setting

Press the main band selector knob to enter function setup.

Switch the main band selector knob to

Press key to enter function menu.

Turn the main band selector knob to

choose No. 48 menu. The LCD displays

"DIMMER".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value from 32 brightness levels.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one second to store.

choose desired value.

ON: turn on AM function. OFF: turn off AM function.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for one

second to store setup and exit.

EXTERNAL SPEAKER PORT

The radio has two external speaker options.

Press key to enter function menu.

Turn the main band selector knob to

choose No. 52 menu. The LCD displays

"VSPCONT".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

MICROPHONE KEYPAD BACKLIGHT BRIGHTNESS

Page 35

DB-750X

Press key to enter function menu.

Turn the main band selector knob to

choose No. 68 menu. The LCD displays

"PASSWD".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

ON: Turn on password function. OFF: Turn off password function.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for 1

second to store setup and exit.

PASSWORD FUNCTION

TALK AROUND

MICROPHONE SPEAKER

When password function is on, you will be required to enter it after power on. The password must be programmed before using this function.

General Setting

NOTE

BEEP VOLUME CONTROL

Press key to enter function menu.

Turn the main band selector knob to choose No. 53 menu. The LCD

displays “BP-VOL”.

Press the main band selector knob to enter function setup

Switch the main band selector knob to choose desired value.

LOW: Beep volume is low.

HIGH: Beep volume is high.

Press the main band selector knob or key to store value and return to function menu.

INT: Internal speaker, VHF and UHF band share internal speaker.

Plug external speaker into the SP jack on rear of radio to hear both bands on external speaker.

EXT: Plug the optional Y speaker cable into the ST jack on rear of

radio along with two speakers to split VHF and UHF audio.

Press the main band selector knob or key to store value and return to function menu. Press

key or hold selector knob for over

one second to store setup and exit.

Press key to enter function menu.

Turn the main band selector knob to choose No. 55 menu. The LCD

displays “HND SPK”

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value

HSPKOFF: Turn off microphone speaker.

HSPK ON: Turn on microphone speaker.

MSPKOFF: Turn off main speaker.

Press the main band selector knob or

key to store value and return to

function menu. Press

key or hold

selector knob for over 1 second to store setup and exit.

With this function on, the transceiver will transmit on the repeater output frequency when current channel is programmed with a repeater offset.

Press key to enter function menu.

Turn the main band selector knob to

No. 54 menu. The LCD displays

“TALK”.

Press the main band selector knob to

enter function setup.

Switch the main band selector knob to choose desired value

ON: Turn on Talk Around OFF: Turn off Talk Around

Press the main band selector knob or key to store value

and return to function menu. Press

key or hold selector knob for

1 second to store setup and exit.

Page 36

Microphone Operation

SEND DTMF SIGNALING

MAIN/SUB BAND SWITCHING

FUNCTION OPERATION THROUGH PA-PD KEYS

You can operate the transceiver by keypad or input desired frequency

and channel through the microphone.

Hold the PTT key; input the desired DTMF signaling by the numeric keys.

This transceiver is defaulted on dual receive, in this status, a MAIN icon

will display in the top right corner of the main band frequency; transmitting is only available on the main band. In standby, you can switch main band

and sub band by the A/B key.

This function is valid only when current channel is set with offset frequency.

PRI: Add or delete priority channel. In

channel mode, press the key programmed as PRI function to set priority channel. When the LCD displays

the

current channel is set as priority channel. Repeat above operation; the

disappears, and the curent channel is not set as priority channel.

LOW: Output power setup. In standby, press the key programmed as LOW function to change the power level. When LCD displays HIGH, the transmitting power on current channel is high. When LCD displays MID1, the transmitting power on current channel is middle 1, When LCD displays MID2, the transmitting power on current channel is middle 2. When LCD displays LOW, the transmitting power on current channel is low.

TONE: CTCSS/DCS code setup. In standby,

press the key programmed as TONE function

to setup CTCSS/DCS code. When the LCD displays "ENC" and CTCSS frequency, press the [ UP/DOWN ] key to choose CTCSS encode. When the LCD displays "ENC","DEC" and CTCSS frequency, press the microphone

[ UP/DOWN ] key to choose CTCSS decode. When the LCD displays "DCS" and DCS code, press the microphone [ UP/DOWN ] key to choose DCS code.

MHZ: In VFO mode, press the key programmed as MHz function; the megabit digital in the LCD flashes. Now turn the channel knob or microphone [ UP/DOWN ] key to adjust frequency by 1 MHz step. In channel mode, press this key;

the channel number flashes. Adjust selector knob or microphone

The PA,PB,PC,PD, keys are programmable with the following functions.

See page 25 for microphone programming.

RPTR: OFFSET direction setup. In standby,

press the key programmed as RPTR function to change the offset direction. When LCD displays"+", means TX offset id plus; when the LCD displays"-", means TX offset is minus.

NOTE

MIC

A/B

MAIN

PTT

Main/Sub band switch

DOWN

MIC

Numeric Keys

Microphone speaker

Page 37

DB-750X

Microphone Operation

[ UP/DOWN ] key to adjust channel.

REV: In standby, press the key programmed

as "REV" function to turn-on or turn off Frequency Reverse function.

HOME: HOME channel switch. In standby,

press the key programmed as "HOME" function to switch between home channel and current channel.

MAIN: Main band switch. In standby, press

the key programmed as "MAIN" function to

choose left band or right band as main band.

VFO/MR: Working mode switch. In standby,

press the key programmed as "VFO/MR" function to switch between channel mode and frequency mode.

SCAN: Scan function. In standby, press the

key programmed as "SCAN" function to start channel scan or frequency scan.

SQL OFF: Turn off squelch. In standby,

press the key programmed as "SQL OFF" function to turn off squelch to hear very weak signals. Repeat the above function to turn on squelch.

TBST: Transmit tone burst. In standby, press the key programmed as "TBST" function to transmit selected tone burst. This function is used to access some repeaters.

CALL OUT: Calling. In standby, press the key programmed as "CALL OUT" function to transmit pre-programmed DTMF, 2-Tone, or 5-Tone code.

COMP: Compander function. In standby, press the key programmed as "COMP" to turn on or turn off compander function.

SCR: Scrambler function. In standby, press the key programmed as "SCR" function to turn

on or turn off scrambler function. Choose optional scrambler groups (from

nine xed groups and two self dened groups).

TONE DEC: Add optional signaling. In standby press the key programmed as"TONE

DEC" function to choose DTMF(DT), 2-Tone (2T), 5-Tone (5T), or OFF.

W/N: Wide or narrow band setup. In standby, press the key programmed as

"W/N" function to choose wide band, middle band and narrow band.

TALK: Transceiver transmits on repeater output. Press the key programmed as "TALK" to turn on or turn off talk-around function.

OFF: No function.

Page 38

ASSIGNING A CHANNEL TO A MEMORY BANK

Memory Banks

Select memory channel to assign to a memory bank.

Press key to enter function menu.

Turn the main band selector knob to choose No. 56 menu. The LCD

displays "BAK"

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose desired value.

OFF: No bank assignment

A, B, C, D, E, F, G, H, I, J to assign the selected bank.

Press the main band selector knob or key to store.

10 memory banks are available for memory channel assignments to

ease in operation of the DB-750X dual band radio. You can enable one

bank or multible banks through either software programming or through

the radio itself.

BANK LINKING

Press key to enter function menu.

Turn the main band selector knob to choose No. 57 menu. The LCD

displays "BALK".

Press the main band selector knob to enter function setup.

Switch the main band selector knob to choose which banks to link.

The following menus allow you to link banks A-J. ON/OFF: Select ON to turn on Bank Linking, OFF to turn off Bank Linking

Menu 58 Bank A Link ON /OFF

Menu 59 Bank B Link ON /OFF

Menu 60 Bank C Link ON /OFF

Menu 61 Bank D Link ON /OFF

Menu 62 Bank E Link ON /OFF

Menu 63 Bank F Link ON /OFF

Menu 64 Bank G Link ON /OFF

Menu 65 Bank H Link ON /OFF

Menu 66 Bank I Link ON /OFF

Menu 67 Bank J Link ON /OFF

Press the main band selector knob or key to store.

CHOOSING ACTIVE BANK

Select either left or right band in memory mode.

Press key to enter bank mode.

Bank numbers show in the position of channel number. If a channel number is not assigned, a bank "--" will show; otherwise the assigned bank of that channel will show.

Rotate the selector knob to choose desired bank to view.

Press key to conrm. Radio will switch to chosen bank. You can

now view or scan channels in choosen bank.

Press key two times to cancel bank view and return to memory view.

Memory banks can be linked together for expanded scanning or viewing.

Page 39

DB-750X

Use optional MBXCLON cloning cable; connect the cable between the data jacks on both master and slave.

Power on slave unit.

On master unit hold top key while powering on and hold this key until LCD displays “CLONE”.

On master unit turn left volume key down to 0.

On master unit hold key till beep is heard, release, then short press key to activate cloning.

While cloning, both master and slave units will display “CLONE XX” where “XX” stands for amount of data being cloned.

When master unit displays “CLONE” again and the slave unit repowers on, cloning is complete.

Cable Clone

This feature will copy the programmed data and parameters from the master unit to slave units. It copies the parameters and memory program settings.

To clone multiple radios, switch the slave unit with another radio by connecting the clone cable in the data jack. Turn the new slave radio on and then repeat step 5 above. If the data is not successfully transmitted, turn off both units. Make sure the cable connection is correct and repeat the entire operation from the beginning.

NOTE

FACTORY RESET

If your radio seems to be malfunctioning because of wrong operation or setup, this function will be able to resume all setup and channels to factory

default.

Hold the top

button while powering on the radio. All channel and function setups will resume to factory default. All memory channels will be erased.

Clone Cable (MBXCLON)

�

C N

LOW

V /

H M

S C

S E T

TV/SOL

�

/ M

LOW

V /

H M

S E

TV/SOL

Page 40

Maintenance

TROUBLE SHOOTING

Problem

+ and - polarities of power connection are reversed. Connect red lead to plus terminal and black lead to minus terminal of DC power supply.

(b) Fuse is blown.

Check and solve problem resulting in blown fuse and replace fuse with new fuse.

Key-lock function is activated. Cancel keylock function.

Transceiver is in CALL mode or VFO mode.

DEFAULT VALUE FOR FACTORY RESUME

Dual Band Mobile Radio

Left band

VFO frequency

Memory channel 1-758

Offset direction

Offset frequency

Step size 10 kHz

88.5 Hz

017N

OFF

CTCSS code --

CTCSS frequency

DCS code

DCS group

Output power

Key lockout

TOT 3

APO

Squelch level

Right band

145.150 MHz 435.150 MHz

600 kHz 5 MHz

(a) Power is on, nothing appears on display.

Possible Causes and Potential Solutions

(d) No sound comes

from speaker.

• Squelch is muted. Decrease squelch level.

• Tone or CTCSS/DCS squelch is active. Turn CTCSS or DCS squelch off.

(e) Key and dial do not function.

(f) Rotating dial will not change memory

channel.

• Microphone connection is poor. Connect microphone properly.

• Antenna connection is poor. Connect

antenna properly.

(g) PTT key is pressed

but transmission does not occur.

Page 41

DB-750X

General

Frequency range

RX: 108-136 MHz AM

136-174 MHz FM Wide/FM Narrow

220-260 MHz FM Wide

350-490 MHz FM Wide/FM Narrow

TX: 136-143.995 MHz FM Narrow

144-147.995 MHz FM Wide

148.000-174 MHz FM Narrow 400-429.995 MHz FM Narrow

430-449.995 MHz FM Wide

450-469.995 MHz FM Narrow

470-490 MHz FM Wide

Number of channels 750 channels

Channel spacing

25 kHz(Wide band)

20 kHz(Middle band)

12.5 kHz (Narrow band)

Phase-locked step

2.5 kHz, 5 kHz, 6.25 kHz, 10 kHz, 12.5 kHz,

15 kHz, 20 kHz, 25 kHz, 30 kHz, 50 kHz

Operating voltage 13.8 V DC ±15%

Squelch Carrier/CTCSS/DCS/5-Tone/2-Tone/DTMF

Frequency stability ±2.5 ppm

Operating temperature -20 ~ +60°C

Dimensions(WxHxD) 139 (W) x 40 (H) x 212 (D) mm

Weight about 1.14 kg

Specifications

RX/TX: 144-146 MHz, 430-440 MHz

Receiver (ETSI EN 301 783)

Wide band Narrow band

Sensitivity

(12dB SINAD)

≤0.25 μV ≤0.35 μV

Adjacent channel

selectivity

≥70 dB ≥60 dB

Audio response +1~-3 dB (0.3-3 kHz) +1~-3 dB (0.3-2.55 kHz)

Hum & Noise ≥45 dB ≥40 dB

Audio distortion ≤5%

Audio power output >2 W @ 10%

Transmitter (ETSI EN 301 783)

Wide band Narrow band

Power output

Modulation 16KΦF3E 11KΦF3E

Adjacent channel

power

≥70 dB ≥60 dB

Hum & Noise ≥40 dB ≥36 dB

Spurious emission ≥70 dB ≥70 dB

Audio response +1~-3dB (0.3-3 kHz) +1~-3dB (0.3-2.55 kHz)

Audio distortion ≤5%

50 W / 25 W / 10 W / 5 W (VHF)

40 W / 25 W / 10 W / 5 W (UHF)

Page 42

62.5 77.0 91.5 107.2 127.3 151.4 167.9 183.5 199.5 225.7 254.1

67.0 79.7 94.8 110.9 131.8 156.7 171.3 186.2 203.5 229.1

Self

Dened

69.3 82.5 97.4 114.8 136.5 159.8 173.8 189.9 206.5 233.6

71.9 85.4 100.0 118.8 141.3 162.2 177.3 192.8 210.7 241.8

74.4 88.5 103.5 123.0 146.2 165.5 179.9 196.6 218.1 250.3

51 GROUPS CTCSS TONE FREQUENCY(HZ)

1024 GROUPS DCS CODE

Attached Chart

000 001 002 003 004 005 006 007 010 011 012 013 014 015 016 017 020 021 022 023 024 025 026 027 030 031 032 033 034 035 036 037 040 041 042 043 044 045 046 047 050 051 052 053 054 055 056 057 060 061 062 063 064 065 066 067 070 071 072 073 074 075 076 077 100 101 102 103 104 105 106 107 110 111 112 113 11 4 115 116 117 120 121 122 123 124 125 126 127 130 131 132 133 134 135 136 137 140 141 142 143 144 145 146 147 150 151 152 153 154 155 156 157 160 161 162 163 164 165 166 167 170 171 172 173 174 175 176 177 200 201 202 203 204 205 206 207 210 211 212 213 214 215 216 217 220 221 222 223 224 225 226 227 230 231 232 233 234 235 236 237 240 241 242 243 244 245 246 247 250 251 252 253 254 255 256 257 260 261 262 263 264 265 266 267 270 271 272 273 274 275 276 277 300 301 302 303 304 305 306 307 310 311 312 313 314 315 316 317 320 321 322 323 324 325 326 327

330 331 332 333 334 335 336 337

The self dened CTCSS tone supports non-standard codes. The frequency must be

pre-programmed

Page 43

DB-750X

Attached Chart

340 341 342 343 344 345 346 347 350 351 352 353 354 355 356 357 360 361 362 363 364 365 366 367 370 371 372 373 374 375 376 377 400 401 402 403 404 405 406 407 410 411 412 413 414 415 416 417 420 421 422 423 424 425 426 427 430 431 432 433 434 435 436 437 440 441 442 443 444 445 446 447 450 451 452 453 454 455 456 457 460 461 462 463 464 465 466 467 470 471 472 473 474 475 476 477 500 501 502 503 504 505 506 507 510 511 512 513 514 515 516 517 520 521 522 523 524 525 526 527 530 531 532 533 534 535 536 537 540 541 542 543 544 545 546 547 550 551 552 553 554 555 556 557 560 561 562 563 564 565 566 567 570 571 572 573 574 575 576 577 600 601 602 603 604 605 606 607 610 611 612 613 614 615 616 617 620 621 622 623 624 625 626 627 630 631 632 633 634 635 636 637 640 641 642 643 644 645 646 347 650 651 652 653 654 655 656 657 660 661 662 663 664 665 666 667 670 671 672 673 674 675 676 677

700 701 702 703 704 705 706 707 710 711 712 713 714 715 716 717

720 721 722 723 724 725 726 727 730 731 732 733 734 735 736 737 740 741 742 743 744 745 746 747 750 751 752 753 754 755 756 757 760 761 762 763 764 765 766 767 770 771 772 773 774 775 776 777

Page 44

Menu Quick Reference List

Menu Name Default Page Function Settings

1 APO OFF 16 APO (AUTOMATIC POWER OFF) Settings from 0.5 through 12 hours, OFF 2 ARS OFF 16 AUTOMATIC OFFSET OFF; when ON, offset for 136-174 MHz is 0.6 MHz; 400-490 MHz is 5 MHz 3 STEP 2.5 16 FREQUENCY CHANNEL STEP SETUP (in Hz) 2.5 k, 5 k, 6.25 k,10 k,12.5 k,15 k, 20 k, 25 k, 30 k, 50 k 4 BAND ON 17 VFO BAND LOCKOUT ON, OFF 5 BEEP ON 17 BEEP FUNCTION ON, OFF 6 CLKSFT OFF 17 CPU CLOCK FREQUENCY CHANGE ON, OFF 7 2TN ENC 00 17 2TONE ENCODE SELECT 0-23 8 5TN ENC 00 18 5TONE ENCODE SELECT 0-99 9 TON DEC OFF 18 ADD OPTIONAL SIGNALING DT(DTMF), 2T, 5T, OFF 10 TC CDCS OFF 18 CTCSS ENCODE SETUP 62.5-254.1 / 000N -7771 11 RX CDCS OFF 19 CTCSS DECODE SETUP OFF, CTCSS, DCS 12 DSP SUB FREQ 19 SUB BAND DISPLAY SETUP FREQ, DC-IN, OFF 13 DTMF D 500ms 19 DTMF ENCODE PRE-LOADING TIME 100 ms, 300 ms, 500 ms, 800 ms, 1000 ms 14 DTMF S 50ms 20 DTMF ENCODE TRANSMITTING TIME 30 ms, 50 ms, 80 ms, 100 ms, 150 ms, 200 ms, 250 ms 15 DTMF W -- 20 DTMF ENCODE SETUP 06-16 (6 codes) 16 SGN SQL SQ 20 SQUELCH MODE SETUP SQ,CTSS/DCS,TONE,CT*TO,CT/TO 17 COMP OFF 21 COMPANDER ON, OFF – Reduces background noise 18 SCR OFF 21 SCRAMBLER SETUP 1-9,U1,U2, OFF 19 TBST 1750 21 TONE BURST 100 Hz, 1450 Hz, 1750 MHz, 2100 Hz 20 KEYMOD KEY 1 22 KEYPAD MODE SETUP Upper and Lower buttons conguration. KEY1, KEY2 21 LOCK OFF 23 KEYPAD LOCKOUT ON, OFF 22 LOCKT OFF 23 TX OFF (PTT LOCKOUT) BANDR,BANDL,BAND BOTH, OFF 23 SQL 04 23 SQUELCH LEVEL SETUP 1 – 20 levels 24 REV OFF 23 FREQUENCY REVERSE ON / OFF 25 MUTE TX 24 SUB BAND MUTE SETUP TX, RX, RX/TX 26 NAME C ------- 24 EDITING CHANNEL NAME 7 CHARACTERS 27 HPER AUTO 24 CHANNEL FUNCTION AUTO STORAGE SETUP MANUAL/AUTO - HYPER 28 PG PA VFO/MR 25 MICROPHONE PA MULTIFUNCTION KEY PRESS DEFINITION 29 PG PB TALK 25 MICROPHONE PB MULTIFUNCTION KEY PRESS DEFINITION 30 PG PC SCAN 25 MICROPHONE PC MULTIFUNCTION KEY PRESS DEFINITION 31 PG PD OFF 25 MICROPHONE PD MULTIFUNCTION KEY PRESS DEFINITION 32 RF SQL OFF 25 RF SQUELCH LEVEL SETUP S2, S5, S9, S-full 33 RPT MOD OFF 25 OFFSET DIRECTION SETUP -,+,OFF 34 SCAN TIME 25 SCAN DWELL TIME SETUP TIME, BUSY, SECEDE

Page 45

DB-750X

Menu Quick Reference List

Menu Name Default Page Function Settings

35 SCAN M MEM 26 PRIORITY CHANNEL SCAN MEN, MSN 36 SHIFT 600 26 OFFSET FREQUENCY SETUP 0 – 100 MHz 37 DISPLAY FREQ 26 DISPLAY MODE SETUP FREQ, CH, NAME 38 REPLOCK OFF 27 BUSY CHANNEL LOCKOUT RLORP, RLOBU, OFF 39 DTMF ID 001 27 RADIO'S DTMF SELF ID ENQUIRY 40 5TON ID 12345 27 5TONE SELF ID ENQUIRY 41 TOT 2 MIN 27 TOT (TIME-OUT TIMER) 1-30 MIN 42 VFOTR OFF 28 VFO FREQUENCY LINKAGE ON, OFF 43 WIDNAR NARROW 28 WIDE/NARROW BAND WIDE (25 kHz), MIDDLE (20 kHz), NARROW (12.5 kHz) 44 X-RPT -- 28 CROSS BAND REPEAT X-RPT, XSTART 45 LDC RED 1 28 LCD BACKLIGHT RED 46 LCD GRN 32 28 LCD BACKLIGHT GRN 47 LCD BLU 32 28 LCD BACKLIGHT BLU 48 DIMMER 32 29 KEYPAD BACKLIGHT BRIGHTNESS - MICROPHONE BRIGHTNESS – 32 LEVELS 49 NOTE -- 29 CALLING RECORD RECORD THE LAST 16 CALLS 50 AM ON 29 AM FUNCTION ON, OFF 51 AUT AM AUTO 29 AUTOMATIC AM FUNCTION ON, OFF 52 VSPCONT IN 29 VHF EXTERNAL SPEAKER PORT INT, EXT SP1, SP2 53 BP-VOL LOW 30 BEEP VOLUME CONTROL LOW, HIGH 54 TALK OFF 30 TALK AROUND 55 HND SPK MSPKOFF 30 MICROPHONE SPEAKER HSPKOFF, HSPKON, MSPKOFF 56 BAK OFF 33 MAIN BANK SET (BANKS – SET LEFT / RIGHT SIDE) OFF, A, B, C, D, E, F, G, H, I, J 57 BALK OFF 33 BANK LINKING ON/OFF 58 BLK A OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF (*Menu 58~67 will not appear until menus 56 & 57 are activated) 59 BLK B OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 60 BLK C OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 61 BLK D OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 62 BLK E OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 63 BLK F OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 64 BLK G OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 65 BLK H OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 66 BLK I OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 67 BLK J OFF* 33 ENABLE LINK TO THE MAIN BANK SET ON/OFF 68 PASS OFF 30 Enter a PASSWORD

Page 46

Rev D 8/2013

Powerwerx

263 N Berry St

Brea, CA 92821

www.powerwerx.com