Seeker D User’s Guide
Document Num., Rev. 4
May 2018
Page 47
Ambient Noise Level Measurement
This measurement is used to find ambient noise sources such as vehicle wiring, Wi-Fi
access points, or cellular devices that may be emitting RF signals at the currently selected
leakage frequency. This provides a useful tool for troubleshooting noise issues that may
occur when the Seeker D is installed in close proximity to other devices within a vehicle.
To perform a measurement of ambient noise that does not carry the tagged signal of the
CT-4, turn your Seeker D on and press the
SELECT
button repeatedly until the arrow
appears under the TAG icon, as shown in the image below.
• When the Ambient Noise Level Measurement display is selected, pressing the
Ambient Level
Measurement Disabled
Antenna Selection Alert
When the Seeker D is either removed from the Mobile Mount, turned on, or the selected
preset frequency is changed to another frequency band (High to Low, Low to High), the
following will occur:
• An alert is displayed that tells you which antenna should be used based on the
selected preset frequency as shown in the following images.
• Attach the proper antenna and then press any button to dismiss the alert.
Attach Low Band Antenna
Attach High Band Antenna
CHANGE
button will enable/disable the Ambient Noise
Level Measurement function.
• When this display is selected, the following will occur:
• If the Ambient Noise Level Measurement function
is currently disabled, only the arrow below the TAG
icon will flash as indicated by the red circle in the
image to the right.
