Question about Cobra XRS-757 Radar Detector

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Cobra xrs757 X Band

How do I turn off the X band on my Cobra XRS 757? I dont have the manual anymore. I looked on the cobra website and tried the mute and dim buttons. Thats did not work. Anyone have one that can tell me hoe to turn this alert off? Thanks!

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The x-band is the considered a "trash band". It picks up things like automatic doors at supermarkets and such. About every radar detector made has an X band for non-police radar. There is no way to turn this band off on the XRS-757.

Holding down the dim button for 2 seconds turns the V alert on/off
Holding down the city button for 2 seconds turns the Spectra on/off
Holding both city and dim together for 2 seconds turns K and Ku band on/off.

Posted on Dec 20, 2008

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1 Answer

Dont know waht codes mean


By Codes do you mean the X, K and Ka signals that the unit is reporting? If so, those are the 3 bands used for police radar. X is the oldest and not used very much. K is also an older band. Ka however is the newer band and the most used for speed tracking.

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X band is usually some electrical signal not to worry.
K band is usually a radar sign or machine that tells you your speed. (Small town Sheriffs use this band also because they cant afford newer technology)
Ka
means K band America- If you see this symbol slow down and look around.
Ku means K band Europe- If you see this symbol slow down and look around

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as far as i know radar is radar it all works on band width
i would think you should be find cobra can answer you 773-889-3087

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Its all marketing hype. Cobra breaks up the three X, K and Ka bands into sub-bands, and they do the same for the single 904nm laser wavelength. There are no sub-bands for X or K band. In the USA, Ka band radar guns operate on three Ka band frequencies: 33.8, 34.7 nd 35.5 MHz. Cobra also breaks up the single laser band based on the known pulse rates of various laser gun models. Yet in general if you get a laser alert from a nearby cop then likely you have been tagged and will be getting a ticket.

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Dec 10, 2008 | Cobra XRS-757 Radar Detector

1 Answer

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"K" IS LOCAL POLICE BAND, "KA" IS STATE TROOPER, AND "X" IS SILENT ELECTRONIC ALARM SYSTEMS. HAVEN'T FIGURED OUT WHAT "VA-2 ALERT" IS YET.
OTISRAYSR

Jun 16, 2008 | Cobra XRS-757 Radar Detector

1 Answer

Cobra 757 codes


X stands for wide band radars(easy to detect,lots of false alarms)
K/Ka stands for pulse band radars(similar signal has auto doors)
W,L stands for laser detection (very little false signals)
Ku stands for signal most used on speed cameras
V stands for radar detectors detector
Have in mind that you can only lower your speed 20-30 km/h in city zones, and up to 50 km/h on highway.This depends on car,brakes and You.

Jun 16, 2008 | Cobra XRS-757 Radar Detector

1 Answer

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do you have the manual? It sounds like, in your example, the unit is picking up X band at a signal strength of level 1.

Jun 15, 2008 | Cobra XRS-757 Radar Detector

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I called cobra support(777-889-3087) and it was around $6 plus shipping for a replacement speaker.
the correct phone number for cobra support is 773-889-3087 and can be found on their website.
Cobra was very courtious and I also got my replacement speaker for my XRS-9500.!

Feb 20, 2008 | Cobra XRS-757 Radar Detector

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