Precautions For Use
● There is high pressure inside the machine,maintenance can only be operated
by professional and technical person.
● Please put the machine in a cool dry and ventilated environment for use,the
ambient temperature should not be higher than 35 degree centigrades.
● After antenna installed,there should be 5 meters above from the ground and
wall spacing as standard installation environment.
● When install the feed tube,be sure to tie the feed tube to the mounting rod with
a tie to prevent the feed tube from pulling loose on the connector.
● Please do not turn on the machine without connecting the antenna.
● Please do not touch the antenna after machine is power on.
● Please do not use this machine in explosive antospheres(eg gas stations, gas,
steam,etc.).
● Please comply with local radio regulations.
TR502 FM Transmitter User Manual
1
2
3
temperature rises. Adjust the antenna oscillator height corresponding to the
launch frequency or adjust the antenna position;
3. Into the outlet there are obstacles, blocked the flow of air temperature is too
high;
4. engine room air convection, or the engine room temperature is too high.
Technical Parameter
Lever antenna frequency length corresponding table
NO.
Item
Technical Parameter
Working voltage
Working current
Frequency range
Frequency stability
Frequency step
Environmental Operating temperature
Output impedance
RF output power
Harmonic / clutter radiation
Audio distortion
Bluetooth distance
Frequency response
Resolution degree
Input level
Modulation frequency offset
SNR
Size
Weight
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
DC 12V
﹤
3A
87-108MHz
±10PPM
100KHz
-10
℃
~45
℃
50Ω
0W~15W
≤
－
50dB
0.3%
≤
5m
50Hz~15000Hz
≥
30 dB
≤-
15~15 dBV
±75KHZ
≥
60dB
144*100*54
550g
Working
Frequency
Transmit Power
Reflected Power
Soundtrack Mode
U Disk Play
Bluetooth Connect
Alarm
MHz
FWD
REF
U Disk Outlet
PC Control
Power Socket
Cooling Fan
TNC Antenna Female
seat
Audio Volume Adjustment
Audio Socket
On/Off Setting Button
Down Button
Up Button
Microphone socket
Microphone Volume
Adjustment
MHz
FWD
REF
Function and Parameter setting
1. Power On/Off
When the machine is connected to power, then it starts.
In working condition, long press
【
】
key, the machine enters standby mode.
In standby mode, long press
【
】
key, the machine goes into working
condition.
2. Frequency Adjustment
In working condition, short press
【
】
, when the
【
MHZ
】
icon in the lower
right corner flashes, press
【
】
or
【
】
to adjust the frequency.
Short press
【
】
or
【
】
, frequency steps by 100K;
Long press
【
】
or
【
】
button,frequency continuously steps by 100K.
3. Power Adjustment
Short press
【
】
button, when the
【
FWD
】
icon on the screen is flashing,
press
【
】
or
【
】
to adjust the power ; Short press
【
】
or
【
】
button Decrement;
【
REF
】
icon is displayed as reflected power.
PS:
The 15-watt power shows 1.9 watts per cell, with a minimum of 0 cells and a
maximum of 8 cells.
4. Soundtrack Adjustment
In the working state, short press
【
】
, when the
【
】
icon of screen power
icon is flashing, press
【
】
or
【
】
to adjust the channel mode;
【
】
is mono;
【
】
When the stereo channel.
5. Amplifier Temperature
In working condition, short press
【
】
button, when the
【
##.##
℉
】
icon is
displayed, it is the current temperature of the amplifier module.
6. Audio / Microphone Volume Adjustment
Turn the audio knob / microphone knob clockwise to increase the volume;
turn counterclockwise to decrease the volume.
Bluetooth Connection / U Disk Play
When the host is turned on, the screen displays
【
】
icon,device open
Bluetooth to search
NIORFNIO to connect.
When the host is turned on, insert U disk, the screen displays
【
】
icon;
press
【
】
or
【
】
buttonto switch songs;
Long press the
【
】
button to switch the sound mode (NO normal, POP pop,
JAZ Jazz, CLA classical, BAS bass).
Long press the
【
】
button to switch play mode (ALL ALL, FOL in sequence,
ONE ONE, RAN)
Input priority:
Audio cable > U disk play > Bluetooth play
Alarm Reminder Function
When the machine is working, it sends alarm and the alarm icon
【
】
flashes
in the lower left corner of the screen.
General troubleshooting:
Standing Wave Alarm
1.The antenna is not connected
2. Feeders rolled together, did not start;
3. Antenna installation from the ground, wall or metal objects too close, adjust the
antenna installation location;
4. Antenna oscillator height and frequency do not match, adjust the height of the
antenna to the launch point.
Temperature alarm
1.Fan does not turn
2. The antenna does not match,which causes standing wave too large and
L
（
CM
）
MHZ
Transmit Frequency
MHZ
Antenna Length
IN
Transmit Frequency
MHZ
Antenna Length
IN
76
38.6
94
31.1
78
37.8
96
30.3
80
36.6
98
29.9
82
35.8
100
29.5
84
35.0
102
28.7
86
34.3
104
28.3
88
33.5
106
27.6
90
32.7
108
27.2
92
31.9
