Troubleshooting - Retevis RM20 Bedienungsanleitung

Frequency coverage
Mode
Frequency stability
Operating temperature range
Antenna impedance
Dimensions (WxDxH)
Weight (main unit)
Transmitter
Output power
Max. frequency deviation
Spurious emissions
Adjacent channel power
Audio harmonic distortion
Current drain
Input resistance
Issues described in the following table are some common operational failure. These types of errors are generally due to improperly
connected, the operation caused by incorrect settings, or operator error caused due to incomplete programming. These problems are
usually not caused by circuit failure. Before suspect intercom failure, please refer to the relevant parts of these forms and the instructions for
use.
Question
Power did not respond.
Unable to connect with
GPS.
Can not be scanned.
Can not launch.
High power can not be
selected.
The same channel can
not talk.
No beep
Can not transmit a
distress call.
No sound from the
speaker.
General
TX: 156.025-157.425 MHz
RX: 156.050 -163.275 MHz
FM (16K0G3E) DSC (16K0G2B)
±10ppm
-20°C - +60°C
50
153mmx152mmx67mm
742g (with microphone)
25W/1W Sensitivity
±5.0 kHz Squelch sensitivity
Adjacent channel selectivity
Spurious response rejection ratio
Intermodulation rejection ratio
Max. current
Audio output power
GPS signal ver.
2K Output Impendence
Possible Cause
1.the power cable is connected well.
2.the power cable fuse broken.
3.the voltage exceeds 17V or below 9V.
1.connection error.
2.different external GPS format.
Not set mark channels (TAG).
Work on the weather channel or 70 channels.
Some channels can transmit at low power.
1,the channel is different frequency (DUP).
2,the working group on its own channel.
Beep off
MMSI code is not set.
1. tone squelch level too.
2. the volume Is too small.
3. the speaker grid water.
Receiver
Solutions
1,check the power cable is connected correctly: red
(+); black (-).
2,then find the cause of blown fuse, replace the
fuse current to 15A.
3,adjust the power supply is 13.8V.
1, check the connections are correct.
2. external GPS format should be NMEA0183-2.0.
The channel you want to scan is set to mark
channels.
Exit the weather channel or 70 channels.
Choose other channels.
1,select a channel.
2,the channel is set to the same frequency.
Open the beep function in the settings mode.
Hold down the [DSC] key to boot into MMSI setting
mode.
1,rotate [SQL] knob to adjust the squelch level.
2,rotate [VOL] knob to adjust the volume.
3,ths use of vibration drainage water discharge.
13
NMEA0183-2.0
4