Spurious ARPA Targets DRS25A-NXT

[Johnny Electron]

Yes, it can both ways. I would keep it out of the radar beam of the antenna. 4ft was still a problem for our SCX20 when it was out of the beam of the StarLink, but it is likely more sensitive to RF noise than the radar would be. As long as it is out of the beam hopefully 4 feet is good. I would run it before drilling and mounting. It is great having good service out on the water. You will love it.

 

[FishTech]

Specification for phased array antennas is 15.5' away from the radar and above the beam. Starlink's beam angle is ~100-130° and the standard is to keep other receivers out of the beam, just as you would your radar.
@Johnny Electron's suggestion is great, try it at the desired location first before hard mounting. If your pilot starts wandering or heading gets flaky, you'll know why.

 

[Bayhouse]

Johnny, any comment on the pic of ARPA tagging people on the beach as I passed by?

Also, some quick research suggests StarLink is using 71 to 76-GHz (or 71,000 to 76,0000 MHz) for the downlink. What is the RADAR frequency?

 

[FishTech]

X-Band is 8-12GHz and S-Band is 2-4GHz. Keep in mind that you do not have to be on a matching frequency to saturate a receiver. High power transmitters, Starlink included, have harmonics and spurious emissions as well.
A prime example of this when you would drive by a FM radio tower that could be broadcasting 94.xMHz and you would lose stations in the 10x.xMHz range range.
Auto Acquire by Doppler is capable of locking on to moving targets on/above land. Birds, trucks, people etc.