(1) Download Spektrum for Windows
Direct Download Link for Current Latest release for Windows: spektrum-win64.zip
Check Download page for Latest Release:
https://github.com/pavels/spektrum/releases
(2) Unzip the file, and inside you will find a file named spectrum.exe.
(3) Plug the dongle in your Windows Computer. If you have a dongle without integral filter, it will show all the signal existing in your area.
(4) Connet the antenna directly to yor dongle (No Filter)
(5) Double click the file spektrum.exe and the program will start
(6) When the program starts, it will detect and list the dongle as shown below. Click on the dongle name, and wait few seconds for scan to start.
(7) Click on the “Measure” button
(8) On “Measure” window, “Gain” will be by default 50 (it is actually 5 dB). Adjust gain by bringing mouse pointer above 50 and turning mouse’s scroll wheel. Set it to maximum 496 (it is actually 49.6 dB).
(9) Leave her to run for 5 minutes so that it repeats scan several times.
(10) Repeat scan with a filter inserted between Antenna and Dongle.
Here are 3 scans I have done recently:
NOTE-1:
The scans below were done in an urban area with strong Cell/Mobile, TV, FM, Fire, Ambulance, Taxi, and other communication signals at VHF, UHF and Microwave frequencies. Other locations may not have such severe RF interference.
NOTE-2:
The scan 1 shows RF noise picked by antenna and processed without any filter, The scans 2 & 3 were done with filters, and show how filters remove this noise.
Scan 1 of 3 - FA Antenna + Generic DVB-T (no internal or external filter)
CLICK ON IMAGE TO SEE LARGER SIZE
Scan 2 of 3 - FA Antenna + ProStick Plus (Only Internal filter of ProStick Plus. No External filter)
CLICK ON IMAGE TO SEE LARGER SIZE
Scan 3 of 3 - FA Antenna + ProStick Plus (with internal filter) + External Filter (FA Light Blue)
CLICK ON IMAGE TO SEE LARGER SIZE
