Radioddity DB25-D Service manual

© Radioddity 2022 page 1 of 209
V2.0, July 2022
Extended Manual for
DB25-D & GD-88

Radioddity Extended manual for Radioddity DB25-D & GD-88 v2.0
© Radioddity 2022 page 2 of 209
Table of Contents
Table of Contents................................................................................................... 2
About Radioddity ................................................................................................. 11
1Disclaimer...................................................................................................... 12
2Revision history of this document.............................................................. 13
3Product safety and RF exposure for portable radios ............................... 14
3.1 Notes on the use of the radio .............................................................................. 14
3.2 Maintenance and Cleaning .................................................................................. 15
Maintenance........................................................................................................15
Cleaning ...............................................................................................................15
4What is in the box? ....................................................................................... 16
4.1 Bill of materials for Radioddity DB25-D ..................................................... 16
4.2 Bill of materials for Radioddity GD-88 ............................................................. 18
5Prepare radio for operation ........................................................................ 20
5.1 Radioddity DB25-D preparation and mounting ........................................ 20
5.2 Radioddity DB25-D Antenna connection .................................................... 21
5.3 Radioddity DB25-D power supply options ................................................. 22
Mobile Operation ................................................................................................22
Base Station Operation.......................................................................................23
Replace fuse.........................................................................................................24
5.4 Radioddity GD-88 Preparation .......................................................................... 25
Mount GD-88 Antenna ......................................................................................25
Charge the battery pack .....................................................................................25
Install Radioddity GD-88 battery pack .............................................................26
Install Radioddity GD-88 hand strap and belt clip ..........................................26
5.5 Accessories connection ......................................................................................... 26
External speaker/headset and microphone .....................................................26
Radioddity DB25-D Speaker-Microphone ..................................................27
5.6 Radioddity DB25-D radio controls .............................................................. 27
Parts description & function applications ..................................................28
5.7 Radioddity GD-88 radio controls ...................................................................... 32
5.8 Radioddity DB25-D display .......................................................................... 34
5.9 Radioddity GD-88 display .................................................................................. 34
5.10 Status Icons............................................................................................................ 35
Transmit / Receiving Icons..................................................................................37
LED Indicators......................................................................................................37
5.11 Keypad operations ................................................................................................ 37
Keys and ENC (channel Selector) operation......................................................38
5.12 Main functions description .................................................................................. 39
Common functions..............................................................................................39
Analog Functions ...........................................................................................40
Digital Functions .............................................................................................40
5.13 Using the numeric keypad.................................................................................... 41
Alphanumerical input of characters ..................................................................41
Programmable Function keys ............................................................................41

Radioddity Extended manual for Radioddity DB25-D & GD-88 v2.0
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6Basic Operation............................................................................................. 43
6.1 Turning the radio On/Off...................................................................................... 43
6.2 Adjust Volume........................................................................................................ 43
6.3 Adjust Squelch .................................................................................................. 43
6.4 Switch VFOs ............................................................................................................ 44
6.5 Busy Channel Lockout ...................................................................................... 44
6.6 Wide/ Narrow Band ......................................................................................... 44
6.7 CTCSS / DCS ....................................................................................................... 44
6.8 Channel Selection.................................................................................................. 45
6.9 Switch between VFO and Channel Mode............................................................ 45
6.10 VFO Frequency Set................................................................................................. 46
6.11 Zone / Channel Selection...................................................................................... 46
6.12 Monitor .............................................................................................................. 46
6.13 Permanent Monitor .......................................................................................... 46
6.14 Repeater / Talk Around ................................................................................... 47
6.15 Emergency Alarm ............................................................................................. 47
6.16 Scan On/Off............................................................................................................ 47
6.17 Roaming On / Off .................................................................................................. 48
6.18 1750Hz Pilot tone ............................................................................................. 48
6.19 Promiscuous Mode .......................................................................................... 48
7Using the radio menu................................................................................... 49
7.1 Accessing the menus and operations ................................................................. 50
8Placing a PTT Call .......................................................................................... 51
8.1 High / Low power................................................................................................... 51
8.2 Select the transmitting VFO.................................................................................. 51
8.3 Receive and Answer to a digital radio call .................................................... 51
8.4 Initiate a digital radio call ............................................................................... 53
8.5 Receive and Answer to an analog radio call ................................................. 53
9Special DMR functions ............................................................................. 54
Remote monitor .............................................................................................55
Remote Kill ......................................................................................................55
Radio Detection ..............................................................................................55
Radio Revive ....................................................................................................55
Call Alert ..........................................................................................................55
GPS ..................................................................................................................56
Record .............................................................................................................56
DTMF ...............................................................................................................56
Encryption .......................................................................................................56
10 The radio Menu functions in detail ............................................................ 57
10.1 Contacts ............................................................................................................ 57
Contact list .................................................................................................57
New Contact ...............................................................................................58
Manual Dial ................................................................................................59
Ham Contacts ............................................................................................59
Ham Group Contacts ................................................................................60
10.2 Message ....................................................................................................... 61
Network support for short messages ...............................................................61

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CreateMsg ..................................................................................................62
Common Messages CommMsg ...............................................................63
Inbox ...........................................................................................................63
Outbox ........................................................................................................64
Draftbox .....................................................................................................65
10.3 Call Log ........................................................................................................ 66
Dialed Calls (DialedNumbs) ......................................................................66
Received Calls ............................................................................................66
Missed Calls ...............................................................................................67
10.4 Scan ................................................................................................................... 68
Scan .................................................................................................................68
Scan List ..........................................................................................................68
Scan Mode ......................................................................................................69
Roam Setting ..................................................................................................70
Precautions for roaming.....................................................................................72
10.5 Zones & Channel .............................................................................................. 72
10.6 Local Set ............................................................................................................ 73
Language .................................................................................................73
Keypadlock ......................................................................................................73
Backlight ..........................................................................................................74
LED indicator (LEDs) .......................................................................................74
DisplayMode ...................................................................................................74
VOX ..................................................................................................................75
Channel Sw .....................................................................................................76
Factory Reset ..................................................................................................76
ABRepeat ......................................................................................................77
10.7 Parameters ........................................................................................................ 78
TOT ..................................................................................................................78
Power ..............................................................................................................79
Slot/Repeat .................................................................................................79
Sleep Mode ...................................................................................................80
Encryption (ENC Level) .............................................................................81
Squelch Level (SQ level) .............................................................................81
Wide / Narrow Band (Bandwidth) ............................................................81
Busy Channel Lockout (BCLO) ..................................................................82
Signaling ....................................................................................................82
CTCSS Phase Reverse (Ctcss Tail) .............................................................83
10.8 Tone Set ............................................................................................................. 83
Profiles ............................................................................................................83
Key Tone (KeyTone) ........................................................................................84
Power Tone ..................................................................................................84
Message Tone (MsgTone) .........................................................................84
Private Call Ring Tone (PCallTone) ...........................................................84
Group Call Ring Tone (G Call Tone) ..........................................................85
Alert Ring Tone (AlertTone) .......................................................................85
FM Call Tone / Power On Tone ................................................................86
10.9 Appendix ........................................................................................................... 86

Radioddity Extended manual for Radioddity DB25-D & GD-88 v2.0
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GPS ..................................................................................................................86
FM Radio .........................................................................................................87
Time .................................................................................................................88
DTMF ..........................................................................................................89
Headset+Speaker ...........................................................................................89
APRS ................................................................................................................90
10.10 Record ....................................................................................................... 91
10.11 Device Info ..................................................................................................... 92
10.12 Channel Edit ................................................................................................. 93
11 Prepare for using the CPS ............................................................................ 95
11.1 Install device driver ............................................................................................... 95
11.2 Install CPS............................................................................................................... 96
11.3 Start CPS................................................................................................................. 99
Special functions ...............................................................................................100
Safe factory settings to a file ............................................................................100
Connect to the radio .........................................................................................100
Read codeplug from DB25-D or GD-88 ...........................................................101
Safe codeplug to file..........................................................................................102
Write codeplug to DB25-D or GD-88................................................................102
Open existing codeplug ....................................................................................103
FactoryReset ......................................................................................................103
12 Using the CPS to make changes to your settings ................................... 105
12.1Device Info............................................................................................................105
Factory Number ................................................................................................105
Serial Number....................................................................................................105
Model Number ..................................................................................................106
Firmware Version ..............................................................................................106
Version Data ......................................................................................................106
Frequency Range...............................................................................................106
The Latest Update .............................................................................................106
Firmware ID ................................................................................................106
12.2 Basic Parameters ................................................................................................107
Radio Name .......................................................................................................107
Language............................................................................................................107
TOT .....................................................................................................................107
Busy Channel Lockout ......................................................................................108
VOX .....................................................................................................................108
VOX Sensitivity...................................................................................................108
Power-saving ...................................................................................................108
Power Saving Ratio ..........................................................................................109
Save power startup time ................................................................................109
Scanmode ..........................................................................................................109
End-tone types...................................................................................................110
Squelch (A) Level ...........................................................................................110
Squelch (B) Level ...........................................................................................110
Radio ID .........................................................................................................111
Rolling Code.......................................................................................................111

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Backlight ON/OFF ..............................................................................................111
Keylock ...............................................................................................................111
Roaming .............................................................................................................112
Roaming Mode ..................................................................................................113
RSSI Set...............................................................................................................113
Connect Check Timer........................................................................................114
Connect Repeater Check Timer .......................................................................114
Connect Time.....................................................................................................114
Record Set .....................................................................................................115
12.3 Common Menus ..................................................................................................115
12.4 Prompt Tone ........................................................................................................116
Profiles ...............................................................................................................116
SMS prompt ..................................................................................................116
Private Call Tone ...........................................................................................116
Group Call Tone ............................................................................................117
Roaming restart prompt...................................................................................117
Repeater lock prompt .......................................................................................117
Keytone ..............................................................................................................117
Keytone volume.................................................................................................117
Low Battery Alert tone ....................................................................................118
Low Battery Alert volume ...............................................................................118
Boot ringtone.....................................................................................................118
Call hang up ..................................................................................................118
12.5 Indicator ...............................................................................................................119
All Indicators ......................................................................................................119
TX Indicator........................................................................................................119
RX Indicator........................................................................................................120
Scanning Indicator.............................................................................................120
Low battery Indicator........................................................................................120
12.6 Preset Keys ...........................................................................................................121
Long Press Duration..........................................................................................121
Available Function for the Preset Keys............................................................121
12.7 Mic Gain................................................................................................................123
MIC Gain 1 ON/OFF ...........................................................................................123
MIC Gain 1..........................................................................................................124
MIC Gain 2 ON/OFF ...........................................................................................124
MIC Gain 2..........................................................................................................124
12.8 Quick Msg ........................................................................................................125
12.9 DMR Service ....................................................................................................125
Remote monitor duration ............................................................................126
Remote Monitor Decode .............................................................................126
Remote Kill Decode ......................................................................................127
Radio Detection ............................................................................................129
Radio Revive ..................................................................................................130
Call Alert ........................................................................................................131
Group Call Hang Time ..................................................................................131
Private Call Hang Time .................................................................................131

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Import Delay .................................................................................................131
DTMF Duration (On-time) ............................................................................132
DTMF Interval (Off-time) ..............................................................................132
DTMF Volume ...............................................................................................132
DTMF code ....................................................................................................132
GPS .....................................................................................................................133
GPS interval........................................................................................................134
GPS channel.......................................................................................................134
Mandown .........................................................................................................134
Mandown Interval ...........................................................................................134
Mandown Angle ..............................................................................................134
Mandown Alarm Duration ..............................................................................134
Inactive Time......................................................................................................135
Pre-alarm Time..................................................................................................135
Response transmission interrupt ....................................................................135
Scrambling frequency .......................................................................................135
Keylock Password On/Off .................................................................................135
Keypad Password..............................................................................................135
12.10 APRS ..................................................................................................................135
Analog APRS ..................................................................................................136
Digital APRS ...................................................................................................136
Manual TX Interval[s] ....................................................................................136
APRS Auto TX Intervals[s] .................................................................................137
Beacon................................................................................................................137
Latitude (degrees) .............................................................................................137
Longitude (degrees) ..........................................................................................137
TX Freq [MHz] ................................................................................................138
TX QT/DQT .....................................................................................................138
Transmit Delay ..............................................................................................139
Prewave Time ................................................................................................139
Transmit Power .............................................................................................139
APRS Tone .....................................................................................................139
Destn SSID .....................................................................................................140
Destn Call Sign ..............................................................................................140
Your SSID............................................................................................................140
Your Call Sign ................................................................................................141
APRS Symbol Table............................................................................................141
APRS Map Icon...................................................................................................141
APRS Signal Path ...........................................................................................143
Your Sending Text .........................................................................................143
No .......................................................................................................................143
Report Channel..................................................................................................143
APRS TG .........................................................................................................144
Report Slot ....................................................................................................144
Call Type ........................................................................................................144
PTT .................................................................................................................144
12.11 Encryption ...................................................................................................145

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12.12 Contacts ......................................................................................................145
Contact list ....................................................................................................145
Ham contacts ................................................................................................147
Ham groups ..................................................................................................149
12.13 Digital Alarm List ........................................................................................151
12.14 Scan List............................................................................................................152
Scan List .............................................................................................................152
Talkback .............................................................................................................153
Scan TX Mode ....................................................................................................153
Appointed Channel ...........................................................................................153
Optional Channel ..............................................................................................154
Selected Channels .............................................................................................154
12.15 RX Group .....................................................................................................155
12.16 Zone [Channel].................................................................................................155
Zone name.........................................................................................................155
13 Setup of channels ....................................................................................... 156
13.1 Z-1 .........................................................................................................................156
13.2 CH mode...............................................................................................................156
13.3 CH Name ..............................................................................................................156
13.4 RX Freq..................................................................................................................156
13.5 TX Freq ..................................................................................................................157
13.6 Power ....................................................................................................................157
13.7 Only RX..................................................................................................................157
13.8 Alarm ....................................................................................................................157
13.9 Prompt..................................................................................................................157
13.10 PCT (Private Call Type) ...............................................................................158
13.11 RX TS ............................................................................................................158
13.12 TX TS .............................................................................................................158
DMR use with simplex hotspot ...................................................................159
13.13 RX CC (Color Code) .....................................................................................159
13.14 TX CC ............................................................................................................160
13.15 Msg Type .....................................................................................................160
13.16 TX Policy ......................................................................................................160
13.17 RX Group .....................................................................................................161
13.18 Encryption List ............................................................................................161
13.19 Scan List............................................................................................................161
13.20 Contacts ......................................................................................................162
13.21 EAS (Emergency Alarm System) ................................................................162
13.22 Relay Monitor ................................................................................................162
13.23 Relay mode ....................................................................................................162
Crossband analog to analog...............................................................................163
Crossband digital to analog................................................................................164
Crossband analog to digital................................................................................165
Crossband digital/analog to analog ...................................................................166
Crossband analog/digital to digital ....................................................................167
Crossband digital to digital.................................................................................168
Digital Same Frequency Repeater .......................................................................169

Radioddity Extended manual for Radioddity DB25-D & GD-88 v2.0
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13.24 Bandwidth ...................................................................................................170
13.25 CTCSS sub audio and DCS signaling ........................................................170
Supported CTCSS frequencies .........................................................................170
Supported DCS codes .......................................................................................171
Supported DCS-I values (reverse DCS) ............................................................171
13.26 RX SQ ............................................................................................................172
13.27 RX QT/DQT (RX CTCSS/DCS) .......................................................................172
13.28 TX SQ ............................................................................................................172
13.29 TX QD/DQT (TX CTCSS/DCS) .......................................................................173
13.30 APRS ..................................................................................................................173
14 Firmware Update........................................................................................ 174
14.1 Firmware update.................................................................................................174
14.2 Install program for firmware update ...............................................................174
14.3 Perform Firmware update..................................................................................174
15 Release notes .............................................................................................. 179
15.1 Firmware Release notes for DB25-D .................................................................179
15.2 Firmware Release notes for GD-88....................................................................179
15.3 CPS Release notes................................................................................................180
16 Quickstart for common use cases............................................................ 181
16.1 Simplex analog FM operation with other station............................................181
16.2 Duplex analog FM operation with a local analog FM-repeater.....................182
16.3 Analog FM operation including analog APRS...................................................183
16.4 Simplex digital DMR operation with other station..........................................184
16.5 Simplex digital DMR operation with Single-HAT hotspot................................185
16.6 Duplex digital DMR operation with Dual-HAT hotspot ...................................186
16.7 Digital DMR operation with digital repeater....................................................188
17 Connectivity ................................................................................................ 190
17.1 Power connector of DB25-D...............................................................................190
17.2 HF Antenna connector of DB25-D .....................................................................190
17.3 GPS antenna connector of DB25-D...................................................................190
17.4 RJ45 Speaker-Microphone connector of DB25-D ............................................191
17.5 K1 connector of DB25-D .....................................................................................191
17.6 HF Antenna connector of GD-88........................................................................192
17.7 Battery connector of GD-88 ...............................................................................192
17.8 K1 connector of GD-88 .......................................................................................192
18 Technical specifications............................................................................. 193
18.1 General specifications of the DB25-D...............................................................193
18.2 Receiver of the DB25-D .......................................................................................194
18.3 Transmitter of the DB25-D .................................................................................194
18.4 General specifications of the GD-88 .................................................................195
18.5 Receiver of the GD-88 .........................................................................................195
18.6 Transmitter of the GD-88 ...................................................................................196
19 Certification................................................................................................. 197
19.1 FCC part 90 approval for DB25-D .....................................................................197
19.2 FCC part 90 approval for GD-88........................................................................198
19.3 CE certificate for DB25-D....................................................................................200
19.4 CE certificate for GD-88 ......................................................................................201

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© Radioddity 2022 page 10 of 209
20 Common problems and how to solve them ............................................ 205
21 Where to find support material................................................................ 208