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2 vLoc3-9800 Receiver
1. To perform a DFT assessment, verify any nearby transmitters are powered off to avoid additional signal frequency
disturbance.
2. Select your preferred frequencies from the frequency menu. These selected frequencies will be assessed in the next few
steps.
Frequency
128Hz
480Hz
491Hz
512Hz
577Hz
815Hz
982Hz
1.02kHz
3. Navigate to the main menu and scroll until you see DFT. Select DFT by pressing the enter key.
4. Once the option is selected, the receiver will automatically assess the user’s preselected frequencies.
5. The receiver will scan all available frequencies and display a progress bar and the list of frequencies assessed will be
displayed. The frequency under test is shown on the top line.
Frequency: 8.19kHz
491Hz
512Hz
80 dB
74 dB
vLoc3-9800
Scan in progress
6. A numerical value ranging from 0dB to 140dB will be shown next to the frequency list, with 140dB the least possible
interference detected and 0db with the largest possible interference.
7. The results are ranked from the least interference possible at the top to the largest amount of most possible interference at
the bottom.
8. In this case, the higher the dB number (80dB), the less interference has been detected by the receiver.
Frequency: 491Hz
491Hz
512Hz
8.19kHz
32.8kHz
65.5kHz
131kHz
200kHz
80 dB
74 dB
62 dB
56 dB
49 dB
43 dB
37 dB
vLoc3-9800
