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Old November 25th, 2018
Henney Henney is offline
Junior Member
Join Date: Nov 2018
Posts: 1
Exclamation Solo S2 won't alert to K Band, single direction Doppler radar

I’ve been a loyal user of the Solo S2, a great cordless detector.

One thing that has baffled me is that the Solo S2 does not alert on the Radarsign TC-500.

It bugged me so much, one day I stopped to copy down the model number and checked the Radarsign website. The TC-600 has replaced the TC-500 but the RF specs appear to be the same:

Oddly, on the Radarsign website, under specs it shows “K Band, single direction Doppler radar” for the TC-500/600.

Any idea why my Solo S2 will not detect these signs?

What about the S3, S4, or any other Escort?

Thank you.

Alan Henney
Takoma Park, Md.
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Old November 25th, 2018
flylow7f39 flylow7f39 is offline
Join Date: Nov 2010
Posts: 3,529

Hope this helps.

Originally Posted by EscortRadar View Post
I see this often with the newer small "your speed is ___" signs that they attach to posted speed limit signs. It is not using police radar to measure your speed. Police do not use those signs to issue citations. Those are there to (hopefully) slow you down, that is all. Actual police radar is used to measure your speed for a citation.
Originally Posted by CJR238 View Post
The speed sign may use an FM-CW modulation to sense the direction of vehicles in its field of view. FM-CW is allowed for license-free "Part 15" devices by the FCC. FM-CW is not allowed for police radar.

Your RD won’t alert because it doesn’t see the frequency. This type of sign is directional and will usually only show speed of oncoming cars.
If you want check the side of the radar antenna on the sign and see what the spec's say on the side of it. It might even say it's a FM-CW, and it runs around 2.45-GHz.
Originally Posted by EscortRadar View Post
Some signs use modulated signals which your RedLine will not alert to.
It could also be operating outside of K band.

Originally Posted by EscortRadar View Post
The speed sign could be transmitting outside of Ka band or it may be using a modulated signal which our newer detectors filter out.

Last edited by flylow7f39; November 25th, 2018 at 06:06 AM.
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Old November 25th, 2018
Butcher318 Butcher318 is offline
Armchair Expert
Join Date: Dec 2011
Location: Indiana
Posts: 2,088

Yea radar signs are not a reliable way any more to test a detector.
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