Midland GB1 User manual
”User manual
PMR446 TRANSCEIVER |
GB1
Radio Communications Supply &
Installation Specialist
Website:
www.radiotronics.co.uk
Email:
Telephone:
0871 288 2816
Instruction Manual for:
_________________________
GB1 instruction guide | 1
Index
Content of the packaging 3
Coverage/range 3
Warnings 3
Main features 4
Programming software (optional) 4
Description of the controls 5
Display 5
Radio (Front side) 6
Rear side 7
Microphone 7
Functions 8
Turning on/off 8
Channel selection 8
Transmission and reception 8
‘FLIP’ function 8
Monitor 9
Reset 12
Technical specifications 13
RTTE 17
2 | GB1 instruction guide
MIDLAND GB1 is an extremely compact PMR446 mobile transceiver desi-
gned for mounting in modern vehicles with limited space. GB1 is free use
in almost all European countries.
GB1 instruction guide | 3
Content of the packaging
• MIDLAND GB1 transceiver
• Mounting bracket
• Antenna with cable
• Microphone
• Microphone holder
• Screws
• Cigarette lighter power cable
Coverage/range
The maximum range depends on terrain condition and is obtained du-
ring use in an open space.
The only limitation to maximum possible range are environmental fac-
tors such as blockage caused by trees, buildings, or other obstructions.
Inside a car or a metallic constructions, the range can be reduced. Nor-
mally the coverage in the city, with buildings or other obstructions is
about 1 or 2 Km. In open space but with obstructions like trees, leaves
or houses the maximum possible range is about 4-6 Km. In open space,
without obstructions and in sight, like for example in mountain, the co-
verage can be more than 12 Km.
Warnings
Do not open the radio for any reason! The radio’s precision mechanics
and electronics require experience and specialized equipment; for the
same reason, the radio should under no circumstances be realigned as
it has already been calibrated for maximum performance. Unauthorized
opening of the transceiver will void the warranty.
4 | GB1 instruction guide
Main features
• Power: 500mW
• Operating temperature: from -20° to +55°C
• Flip function
• 50 CTCSS tones and 104 DCS codes (normal) + 104 DCS codes (inver-
ted) that can be enabled through the optional programming software
• Monitor function
• SCAN function
Programming software (optional)
Thanks to the programming software PRG-GB1, it is possible to increase
the performance of your radio or to reduce its functionality by disabling
some of the default features (CTCSS, TOT...).
For further information, please consult the Programming software ma-
nual.
Any attempt to change frequencies or output power of the radio invali-
dates the approval.
GB1 instruction guide | 5
Description of the controls
Display
A This icon appears when the radio receives a signal or when the
squelch is opened;
BIndicates a CTCSS tone or DCS code activated on the selected
channel;
CIndicates that the selected channel is included in the list of chan-
nels to be scanned (only the first 8 channels are enabled by de-
fault). To enable/disable some channels to the scan list, see para-
graph “Scan”.
DKeypad lock; only /buttons are active.
EThese digits show the selected channel;
FThis icon appears when the radio receives a signal or when it’s
transmitting;
GTransmission mode.
A
B
C
D
E
F
G
1 2 3 4
5678910
11 1213
14
6 | GB1 instruction guide
Radio (Front side)
1-9 /buttons; to increase / decrease the volume level (from 0 to
15). Press to select the desired audio level.
2-7 Channel ▲/▼:to select the desired channel (from 01 to 99).
3 Menu: push this button to enter the functions Menu (from F1 to
F5) where you can change the radio parameters. Press Menu and
select the desired function with the ▲/▼ buttons. Confirm by
pushing again Menu and select the desired level with Channel ▲
or Channel ▼.
4 On/Off: press this key to switch on or off the unit.
5 Monitor: this button suppresses noises on free channels and al-
lows to receive even weak signals.
6 Scan: push this button to start/stop the channel scan. The scan
can be done on the channels enabled to the scan and will stop
when a signal is detected and starts again after 4 seconds if the
signal disappears.
8 LCD display
10 RJ mike connector: connect the microphone or the optional pro-
gramming cable to this jack.
A
B
C
D
E
F
G
1 2 3 4
5678910
11 1213
14
GB1 instruction guide | 7
Rear side
11 Power supply connector
12 Antenna cable
13 EXT SPK jack: you can connect an external speaker to this jack
(3.5mm). In this case the internal speaker is automatically excluded.
Microphone
14 PTT: press to transmit
A
B
C
D
E
F
G
1 2 3 4
5678910
11 12
13
14
A
B
C
D
E
F
G
1 2 3 4
5678910
11 1213
14
8 | GB1 instruction guide
Functions
Turning on/off
Press to turn on/off the unit. When the radio is turned on, you can
press this button to adjust the backlight (6 levels available).
Channel selection
Select the desired channel with the ▲/▼buttons.
If you hold down the ▲/▼buttons for 2 seconds, the channels will scroll
quickly upwards or downwards.
Transmission and reception
Select the desired channel
Press the PTT button on the microphone and speak with a normal tone
of voice to the microphone
To receive, release the PTT.
‘FLIP’ function
Thanks to this function, the unit can be mounted with the speaker facing
up or down; the display can read in either orientation.
To activate this function, keep pressed ▼while turning on the radio: the
LCD display will flip by 180°. Hold down ▲while turning on the radio to
restore to normal position.
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