FMUser SDA-15B - Signal Quality Specifications; Physical Dimensions and Weight; Common Troubleshooting Guide; Cannot Switch Transmitter On

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Radiation
10 Audio distortion 0.2%
11 Frequency Response 50Hz~15000Hz
12 Seperation ≥35 dB
13 Input Electric Level ≤－15 dBV
14 Frequency Modulation ±75KHZ
15 SNR ≥60 dB
16 Transmitter Size 173 ㎜（L）*110 ㎜（W）*48 ㎜（H）
17 Weight About 700g
9.Common troubleshotting:
No Trouble Reason
1
Can’t switch on
transmitter
1）If the socket is electricity connected
2）If the power supply has been correctly
connected.
3）If the power supply is matching the
transmitter.
2
SWR Alarming
1）Antenna not correctly connected
2）
Antenna is not matching the transmitter,
this causes the SWR value too big.
3) Too many reflections around the antenna
3
Temperature
Alarming
1）The fan is not working
2）The antenna is not matching the transmitter,
SWR value gets too big and caused over-heat.
3）The ventilating holes are obstructed and air
flow is slow.
4
SWR value is very
big
1）Antenna is wrongly connected；
2）Antenna is not matching transmitter.
3）Too many reflecting objects around the
antenna
5
Broadcasting range
is too short
1）Antenna cable loss is too much；
2）Broadcasting environment is weak；
3）Output power is not big enough；
4）Antenna is not placed high enough.
5）Antenna is not matching transmitter；
6）The receiver has very low sensibility.