PNI SILVER BULLET RX7500 User Manual - Using The Mute Feature
16
17
Using the Mute Feature
Press the MUTE button to switch between “START MUTE” and “END MUTE”. In the “END MUTE” mode,
the radar detector automatically lowers the audio alert level to the ambient noise level in your vehicle
when it detects a continuous signal for 5 seconds or more. Also the audio alert level remains low
for 60 seconds, even if, during that time, a second separate signal is detected. In the “START MUTE”
mode, the radar detector will remain completely silent but will continue to provide visual alerts.
Understanding Signal Alerts
Three (3) radar bands (X, K, and superwide KA) and one (1) laser band are typically used by police
radar/laser devices. When a radar signal is detected, the screen displays the name of the radar band
– “X”, “K”, or “KA” – together with a number indicating the strength of the detected signal (called
the signal strength meter). When a laser signal is detected, the screen displays “LASER”.
• There are 8 levels in the signal strength meter – 1 to 8. The higher the number, the
stronger the signal.
• The signal strength meter can provide a good indication of the proximity of the detected
signal. Usually, strong signals are closer to you than weak signals.
• When “LASER” alert is displayed, it is highly recommended that you promptly reduce your
speed if youʼre driving faster than the speed limit. Police laser devices can measure the
speed of a target vehicle when it is within 1,500 feet in line of sight.
E
xcept for a few early devices, X band (10.50~10.55 GHz) was the only frequency used for
police radar until the mid-1970ʼs. In 1976 radar devices using K band (24.05~24.25 GHz)
were introduced; this led to the development of the first dual band (X and K) radar detectors.