WISCO International (CELWAVE

TB*078 Series
Hybrid-Ferrite Transmitter Combiners

This RFS hybrid-ferrite transmitter combiner is designed to couple multiple close spaced transmitters into one antenna. It is expandable, highly compact and accommodates close channel spacing with very high isolation.

The TBD Series uses CD Series dual isolators to provide 80 dB minimum isolation when the output hybrid is properly tuned to the antenna. A pair of two channel models may be field expanded to four channels by means of a PBH or PCH hybrid coupler panel and CAB-1 cable assembly.

Features/Benefits

� Allows combining of multiple close spaced transmitters
Maximizes use of tower space, reduces costs.

� No minimum channel separation
Can be used to combine two transmitters on same frequency.

� High isolation
Minimizes the possibility of intermodulation.

� Modular
Simplifies on-site expansion.

Features	TBD078-2	TCD078-2
Input Power/Channel Range, Watts	60 or less	60 to 150
Continuous Power Input, Max. per Channel, Watts	60	100
Weight, kg (lb)	4.2 (9.25)	5.16 (11.38)
Product Type	Hybrid-Ferrite
Frequency Band	30 MHz - 100 MHz
Application	VHF
Number of Channels	2
Minimum Channel Spacing, kHz	25
End-Mount (Yes/No)	Yes
Tx-Tx Isolation, dB	>50
Frequency Range, MHz	66-88
Reflected Power, Max. Allowable from Ant., Watts	60
Bandwidth, MHz	1
Isolation, Min. Tx-Tx, dB	80
Isolation, Min. Ant.-Tx., dB	53
Insertion Loss, Max. per Channel, dB	4.9
Channel Separation for Specifications Given, kHz	25
Input Return Loss, Min., dB	19.0
Output Return Loss, Min., dB	19.0
Connectors - Input	N-Female
Connectors - Output	N-Female
Temperature Range, �C (�F)	-30 to +60 (-22 to +140)
Height, mm (in)	89 (3-1/2 )
Width, mm (in)	483 (19)
Depth, mm (in)	356 (14)
Mounts in 19" (483mm) EIA Rack (Yes/No)	Yes