Site Hawk

The Site Hawk tests, calibrates, and troubleshoots antennas and cables by measuring insertion loss, return loss, and detecting the exact location of system faults.

As a line maintenance technician, I primarily use the DTF-SWR (Distance To Fault - Standing Wave Ratio) function. I want to check a co-ax run from the rack mount plug to the antenna.

You can check the wiring prints and chapter 91 charts for intermediate plugs and wire run lengths, but it's much easier to check the paired system. HF's should be similar lengths, VHF will have different lengths but the graph peaks should have similar appearances. GPS, Localizer, VOR, Glide Slope, and Sat Comm are just some of the other systems that can be checked. All these might have slight differences in lengths, but the graph display's should match.

Site Hawk with calibration "T", cable, and rack adapter.
  
     
  
Removed Radio Altimeter unit (suspected problem with either the transmit or receive antennas).
  
     
  
Basic set-up for DTF-SWR readings.
  
     
  
Display with adapter not connected in rack. The peak shown would be the end of the test cable and attached adapter.
  
     
  
Connection in rack.
  
     
  
Display of cable run to antenna. The first small blip on the left is the cable to rack connection.
  
     
  
The adapters needed. Radio Alts and TCAS use the larger. Comms, Sats, and Navs use the smaller (4240-443).
  
     
  
Site Hawk Manual