The K notch filter is used to help reduce unwanted false alerts from vehicles that use Radar for their Computer-Aided Safety (CAS), such as Blindspot Monitoring (BSM), Lane-Change Assistance, Collision Sensors, and interference from Infotainment systems. Each filter has a recommended setting, and you should only enable them if your setup meets each setting's specific needs.
Compatibility
Before setting these, please ensure that your radar firmware meets the firmware minimums below.
| Detector Model | Firmware Version | Serial Number Series |
|---|---|---|
| Redline 360c | 1.19 | All Serials |
| MAXcam 360c | 1.13 | All Serials |
| Max 360c MKII | 1.6 | All Serials |
| Max 360 MKII | 1.9 | All Serials |
| Max 4 | 1.5 | All Serials |
| Max 3 | 1.6 | 1Rxxxxxx |
| Max 3 | 1.4 | AA3P2xxxxxx, AB4P2xxxxxx |
| Max 360c | 1.15 | All Serials |
| Max 360 | 1.10 | 85xxxxxx |
| Max 360 | 1.13 | 79xxxxxx |
If your detector does not appear on this list, you likely do not have any of the Notches or the K Filter.
Notches & Filters
| K Notch[1] | This narrow carve-out will further blunt the sensitivity of the detector's K-band in the 24.190 GHz to 24.210 GHz frequency range. RECOMMENDATION Turn K Notch ON if setting your Sensitivity Mode (SEN button) to Auto Low K (AutoLoK) and turning off individual K-band Narrows is not working or is not an option. |
| K Notch 2[2] | This will reduce the false alerts generated by Dodge RAM TRX in the 24.050 GHz to 24.069 GHz frequency range. RECOMMENDATION Turn on ONLY if you are experiencing repeated low-level K-band alerts in the 24.050 GHz to 24.069 GHz frequency range. |
| Ka Notch[2] | This will reduce false alerts encountered with certain GM and Chevrolet infotainment centers in the 33.750 GHz to 35.500 GHz frequency range. RECOMMENDATION Turn on ONLY if you are experiencing repeated low-level Ka-band alerts in the (33.750 & 35.500) frequency range. |
| K Filter[2] | Allows drivers to enjoy faster K-band response times (K Filter OFF) or fewer K-band false alerts (K Filter ON). RECOMMENDATION Keep ON unless you need more responsive K-band alerts. |
1 Feature available on the Redline 360c, MAXcam 360c, Max 360c MKII, Max 360 MKII, Max 4, Max 3, Max 360c, Max 360
2 Feature available on the Redline 360c, Max 360c MKII, Max 360 MKII