Bird Technologies 21-87A-11-xx-T Series-Manual - Manual (Page 30)

TX RX Systems Inc. Manual 7-9100-5 10/17/11 Page 24
GENERAL DESCRIPTION
Isolators perform two important functions. Their pri-
mary function is to keep other RF frequencies out
of the transmitter so that intermodulation products
cannot be generated. Isolators have a substantial
amount of reverse isolation. They also insure that
the transmitter never sees any significant reflected
power so it will always operate with maximum sta-
bility at full-power output. Isolators prevent energy
from getting into the transmitters output stage by
dumping reflected RF energy entering the output of
the isolator into a dummy load.
The 800 MHz (compact style) isolators available
from TXRX Systems are broad-band and do not
require tuning. The isolators are available as either
single section or dual section models. Dual section
models consist of two single sections mounted in
the same case with a load permanently attached to
the load port of the first section. Table A1 lists the
800 MHz isolators available from TX RX Systems
along with their performance specifications.
Appendix A
800 MHz Isolators (Compact Style)
TXRX
Systems
Part #
Freq
Range
(MHz)
Isolation
(dB)
(min)
Insertion
Loss
(dB) (max)
3-22223P 764 - 776 50 0.50
3-22224P 794 - 806 50 0.50
3-22225P 806 - 824 50 0.50
3-22226P 851 - 869 50 0.50
3-22227P 870 - 894 50 0.50
3-22228P 925 - 935 50 0.50
3-22229P 935 - 940 50 0.50
3-22230P 940 - 960 50 0.50
3-22223PL 764 - 776 50 0.50
3-22224PL 794 - 806 50 0.50
3-22225PL 806 - 824 50 0.50
3-22226PL 851 - 869 50 0.50
3-22227PL 870 - 894 50 0.50
3-22228PL 925 - 935 50 0.50
3-22229PL 935 - 940 50 0.50
3-22230PL 940 - 960 50 0.50
TXRX
Systems
Part #
Freq
Range
(MHz)
Isolation
(dB)
(min)
Insertion
Loss
(dB) (max)
3-22223PLA 764 - 776 50 0.50
3-22224PLA 794 - 806 50 0.50
3-22225PLA 806 - 824 50 0.50
3-22226PLA 851 - 869 50 0.50
3-22227PLA 870 - 894 50 0.50
3-22228PLA 925 - 935 50 0.50
3-22229PLA 935 - 940 50 0.50
3-22230PLA 940 - 960 50 0.50
3-22223PLB 764 - 776 50 0.50
3-22224PLB 794 - 806 50 0.50
3-22225PLB 806 - 824 50 0.50
3-22226PLB 851 - 869 50 0.50
3-22227PLB 870 - 894 50 0.50
3-22228PLB 925 - 935 50 0.50
3-22229PLB 935 - 940 50 0.50
3-22230PLB 940 - 960 50 0.50
Table A1: Specification for 800 MHz Isolators (Compact Style).