300-360, 400-490 MHz Low-loss transmitter combiners TETRA-A, TETRA-U : Radial :

Electrical specifications

Model	TETRA-4A	TETRA-8A	TETRA-2U	TETRA-4U	TETRA-8U
Operating frequency band, MHz	300-360	300-360	400-490	400-490	400-490
Impedance, Ohm	50
Number of channels	4	8	2	4	8
Min. space TX/TX, kHz	125
Insertion loss @ dB@300kHz, dB	3	4.5	2.6	3.4	4.5
Input power, W	50
Cavity electrical length	1/4λ
Isolation TX-TX not less, dB	75
VSWR	not more than1,3
Temperature Range	30°C to +60°C

Taking into account the enhanced demand for 4 and 8 channel trunking systems a combiner has been worked out on the basis of four-resonator monoblock that is mounted at 19" stand. This has allowed to optimize the ratio volume/Q-factor for 19-inch construction solution. The combiners TETRA-A (at 300-360 MHz) and TETRA-U (at 400-490 MHz) represent a good solution for constructing base stations of the same name standard.

Dependance of loss on frequency separation TX-TX for TETRA-A and TETRA-U low loss transmitters combinets

Low loss transmitter combiner TETRA-4A electric diagram

300-360, 400-490 MHz Low-loss transmitter combiners TETRA-A, TETRA-U

Electrical specifications

Mechanical specifications

Dependance of loss on frequency separation TX-TX for TETRA-A and TETRA-U low loss transmitters combinets Low loss transmitter combiner TETRA-4A electric diagram

Dependance of loss on frequency separation TX-TX for TETRA-A and TETRA-U low loss transmitters combinets

Low loss transmitter combiner TETRA-4A electric diagram