Bird Technologies 73-67-25 Series - Manual (Page 6)

Table of Contents Manual 7-9120-5 07/26/10
Figures and Tables
Figure 1: Block diagram of typical system ............................................................ 1
Figure 2: Noise suppression graph for 6.625” cavities .......................................... 2
Figure 3: Noise suppression graph for 10” cavities ............................................... 3
Figure 4: Typical Peg rack model .......................................................................... 4
Figure 5: Typical 19” Relay rack model ................................................................. 4
Figure 6: Typical combiner installation .................................................................. 5
Figure 7: Measuring T-Pass channel performance ............................................... 6
Figure 8: T-Pass cavity fine tuning ........................................................................ 8
Figure 9: T-Pass cavity tuning controls ................................................................. 9
Figure 10: Coarse tuning a T-Pass cavity ........................................................... 10
Figure 11: Peg rack mounting details .................................................................. 12
Figure 12: Relay rack mounting details ............................................................... 13
Figure 13: Top view of T-Pass cavity .................................................................. 14
Figure 14: Setting loop adjustment reference...................................................... 16
Figure 15: Setting T-Pass loop using step attenuators........................................ 17
Figure 16: Setting BandPass loop using step attenuators................................... 18
Figure 17: Setting T-Pass loop insertion loss ...................................................... 19
Figure 18: Setting Bandpass loop insertion loss ................................................. 20
Table 1: General specifications 6.625” cavity systems.......................................... 2
Table 2: General specifications for 10” cavity systems ......................................... 3
Table 3: Cavity insertion loss reference loop settings ......................................... 15
Appendix A
UHF Isolators (Compact style)
General Description .......................................................................................... 22
Installation.......................................................................................................... 22
Verifying Isolator Functionality ........................................................................ 22
Recommended Test Equipment ...................................................................... 22
Measuring Reverse Isolation (S12) ................................................................... 22
Measuring Insertion loss (S21) .......................................................................... 23
Figure A1: Verifying Reverse Isolation ............................................................... 23
Figure A2: Verifying Insertion Loss .................................................................... 23
Figure A3: Typical Reverse Isolation Waveform ................................................ 24
Figure A4: Typical Insertion Loss Waveform...................................................... 24
Table A1: Specifications .................................................................................... 25