radio repeater

BJ-851 is globally the only mini-size duplex and single-mode antenna units which consists of
duplexer
receiver
transmitter

BJ-851 is globally the only mini-size duplex and single-mode antenna units which consists of duplexer, receiver, transmitter,CPU controller ect. Aluminium diecasting outer cover of vehicular was adopted. It can be used both in cars and in a fixed place, which is suitable for emergency situation.
   Full duplex communication can be achieved between two duplexers and single set can be used as repeater also.It can be increase the communication distance, the same time it has many advantages such as easy to operate and convenient to use.

 Specification
General :
Frequency Range:406-512 MHZ
Frequency Spacing:10MHZ
Duplex Band Width:1MHZ
Modulation Type:FM 16F3
Operating Voltage: 12-14V
Current:standby current 0.3A    Rx current 0.8A   Tx current 3.0A
Frequency Stability: ≥2.5 PPM
Channel Spacing: 25KHZ
Weight: Approx 3kg

 Specification of Duplexer
1:Frequency Range (MHZ)     RX:442.5/452.5MHZ   TX:452.5/442.5MHZ
2:Frequency Spacing (MHZ)            10MHZ
3:Max Output Power (W)              10W
4:Receiving End Insertion loss (dB)       ≤2dB
5:Transmitting End Insertion loss (dB)     <1.5dB
6:Transmitting-Receiving End Isolation (dB)      ≥60dB
7:Max VSWR:                       1.5
8:Operating Temperature Range:           -30-+60°C
9:Frequency Stability:                   Approx 2.5ppm/°C
10:Matched Impedance:                 50Ω
 
- Receiver
1: Simplex Sensitivity:                  ≥0.3uv(12dB SINAD)
  Duplex Sensitivity:                   <3dB
2: Squelch Sensitivity                     ≥0.2uv
3: Selectivity:                          -70dB
4.Spurious Radiation                     -75dB
5: Intermodulation Rejection:              -75dB
6: Residual Noise:                        -45dB
7: DEMP FO:                          6±3dB
8: Audio Output Power:                    4.0W
9.Audio Distortion                       <5%
10: Working Mode:                        receiving mode

 Transmitter
1Output Power                     5-10W
2: Spurious Radiation             ≤80dB
3: Residual Modulation:                      -45dB
4: Audio Distortion:                          <5%
5: Max Modulation:                          5KHZ
6: Pre-emphasis Frequencies:                   6±3dB
7: Working Mode:                            Transmitting Mode

 CPU Controller
1: Receiving-Transmitting Frequency Setting
2: Automatic Repeater Setting
3: MIC and PTT control
4: PC Programming
5: CTCSS and DCS