Instruction: Answer the given question using the supporting document.

Input:
Question: What is the TFSR on/off setting?
Document: This product goes off all the time. I have it set to the lowest setting and it still goes off for no reason. When it does go off it has multiple alarms. With so many alarms, you can't trust if it is true or not.
Here are the settings I use:  Filter 1 mode (it's actually the 2nd filter setting, somewhat confusing), X- off, K- on, Ka-RSID, POP-off, Laser-LSID (laser signature I.D.
Ka band is not affected by the TFSR feature. [more on this in a future article]I have come to really appreciate Whistler's CITY mode. Unlike other detectors, which wean effective reception performance to X-band (and perhaps K-band) when selected, Whistler provides three city modes.The first mode, doesn't affect apparent sensitivity at all, it merely alters the nature of the detector's alerts.
The problem is that proximate conventional radar detectors not only repeatedly false to K-band, but they false in a manner that mimics genuine instant-on radar--something that is very disheartening to the unsuspecting motorist.In my recent travels, I found when Whistler's TFSR filter was enabled, the Pro-78SE effectively eliminated falsing in all but a couple of instances--when I was located in proximity to two sensors that fired in close succession.
When TFSR and FILTER 1 are enabled together, all falses from these sources appeared to be eliminated.As with any increase in filtering "delay," one has to consider this double edged sword for the bands affected by such a feature as it can increase the likelihood of ignoring a quick trigger. Such is the case for the TFSR mode in that there is a minimum length of time the X or K band signal needs to be available for qualification in order to ignore the pulsed traffic flow sensors mentioned above.
I live way out in the country so false alarms aren't that common. With this one, it would false in the middle of a farm field. I thought I might have a setting wrong so I turned off POP and X and tried it. Well, the next couple of falses blew the speaker. Didn't ever even pick up legit radar. Okay, must be a bad unit, let's get another one shipped in.
08/27/13 - Update: Speaker is blown. I saw this problem in other reviews and I now know why!. I sent back to Whistler for warranty. It claims a 3 yr warranty so we'll see what they do. I downgraded from 4 star to 3 star.Original review -  This unit works pretty well. It does not work so well in large cities as it picks up every thing and never stops going off regardless to the setting.
yeah good answer, cripple my high end detector so you do not have to fix it.well i tested this whistler side by side with my bel. the whistler has LESS false alarms and better range.bye bye bell you just lost a customer of 15 years.UPDATE:  08/20/12: The speaker went bad but it was replaced under warranty.
works great, does not detect the newer radars that illinois is now using from bridges, and some mobiles. other bands does a good job.
most of the time it never alerts to the cop even though i know they are running radar. i've never had a laser warning even though I drive 80 highway miles a day to and from work. maybe the unit i purchased was defective or in all likelyhood it's just not good enough to handle the instant on radar and laser guns. i've mounted the unit high and low on the windshield so that's not the problem.
Answer: The Traffic Flow Signal Rejection (TFSR) helps eliminate alerts from radar based traffic flow sensors.