China Wholesale 2 Way Speaker Crossover Factory – Professional home karaoke KTV wireless microphone set wireless mic transmitter – Lingjie
China Wholesale 2 Way Speaker Crossover Factory – Professional home karaoke KTV wireless microphone set wireless mic transmitter – Lingjie Detail:
System indicators
Radio frequency range: 645.05-695.05MHz (A channel: 645-665, B channel: 665-695)
Usable bandwidth: 30MHz per channel (60MHz in total)
Modulation method: FM frequency modulation Channel number: infrared automatic frequency matching 200 channels
Operating temperature: minus 18 degrees Celsius to 50 degrees Celsius
Squelch method: automatic noise detection and digital ID code squelch
Offset: 45KHz
Dynamic range: >110dB
Audio response: 60Hz-18KHz
Comprehensive signal-to-noise ratio: >105dB
Comprehensive distortion: <0.5%
Receiver indicators:
Receiving mode: double-conversion superheterodyne, dual-tuning true diversity reception
Oscillation mode: PLL phase locked loop
Intermediate frequency: the first intermediate frequency: 110MHz,
The second intermediate frequency: 10.7MHz
Antenna interface: TNC seat
Display mode: LCD
Sensitivity: -100dBm (40dB S/N)
Spurious suppression: >80dB
Audio output:
Unbalanced: +4dB(1.25V)/5KΩ
Balance: +10dB(1.5V)/600Ω
Power supply voltage: DC12V
Power supply current: 450mA
Transmitter indicators: (908 launch)
Oscillation mode: PLL phase locked loop
Output power: 3dBm-10dBm (LO/HI conversion)
Batteries: 2x“1.5V No. 5”batteries
Current: <100mA(HF), <80mA(LF)
Use time (alkaline battery): about 8 hours at high power
Simple malfunction treatment
|
malfunction symptoms |
Malfunction cause |
|
No indication on receiver and transmitter |
No power on transmitter, receiver power is not connected properly |
|
The receiver has no RF signal |
The receiver and transmitter frequency bands are different or out of the acceptable range |
|
There is radio frequency signal, but no audio signal |
The transmitter microphone is not connected or the receiver squelch is too deep |
|
Sound guidance circuit malfunction |
|
|
Setting silent mode |
|
|
Audio signal background noise is too large |
Transmit modulation frequency deviation is too small, receive output electrical Level is low, Or there is an interference signal |
|
Audio signal distortion |
Transmitter modulation frequency deviation is too large, receiver output electrical Level is too large |
|
The use distance is short, the signal is unstable |
The transmitter setting power is low, and the receiver squelch is too deep. Improper setting of receiver antenna and strong battery interference around. |
Product detail pictures:
Related Product Guide:
We take pleasure in an extremely fantastic standing among the our prospects for our great product top quality, competitive cost and the finest support for China Wholesale 2 Way Speaker Crossover Factory – Professional home karaoke KTV wireless microphone set wireless mic transmitter – Lingjie , The product will supply to all over the world, such as: Saudi Arabia, Mozambique, Canberra, We believe that good business relationships will lead to mutual benefits and improvement for both parties. We have established long-term and successful cooperative relationships with many customers through their confidence in our customized services and integrity in doing business. We also enjoy a high reputation through our good performance. Better performance will be expected as our principle of integrity. Devotion and Steadiness will remain as ever.
By Faithe from Austria - 2018.12.05 13:53
Wide range, good quality, reasonable prices and good service, advanced equipment, excellent talents and continuously strengthened technology forces，a nice business partner.
By Carey from Lesotho - 2018.11.28 16:25
