This is an auctio for 2 pcs mini Stereo FM transmitters.
It is very small.
Use that chip design of the module have a physical volume small, the component is little, the electric circuit is simple, the price is cheap, be easy to adjust to try and use convenience etc. characteristics.
No. |
Parameter |
Symbol |
Min. |
Typ. |
Max. |
Unit |
Conditions |
1 |
Supply voltage |
Vcc |
2.7 |
3.0 |
3.3 |
V |
|
2 |
Power consumption |
Ic |
- |
18 |
30 |
mA |
|
3 |
Audio input level |
Vin-A |
- |
- |
-10 |
dBV |
|
4 |
Audio frequency rang |
fin-A |
20 |
- |
15K |
Hz |
|
5 |
Pre-emphasis time constant |
t pre |
- |
155 |
- |
us |
|
6 |
Transmission Frequency |
Ftx |
87.7 |
- |
107.9 |
MHz |
* It's based on FCC |
7 |
Channel separation |
Sep |
38 |
40 |
45 |
dB |
Vin=-20dBv |
8 |
Harmonic distortion |
THD |
- |
0.3 |
0.5 |
% |
Vin=-20dBv |
9 |
Pilo modulation rate |
Mp |
12 |
15 |
18 |
% |
Vin=-20dBv |
10 |
Sub carrier rejection ratio |
SCR |
- |
-30 |
-20 |
dB |
Vin=-20dBv |
11 |
Channel balance |
C.B |
-2 |
0 |
+2 |
dB |
Vin=-20dBv |
12 |
Transmission output level |
Vtx |
-50 |
-45 |
-40 |
dBm |
Zo=50ohm |
13 |
Control terinal "H" level input |
Vih |
0.8Vcc |
- |
Vcc |
v |
|
14 |
Control terinal "L" level input |
Vil |
GND |
- |
0.2Vcc |
v |
|
Track up to 10 items on this computer in 
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