NTCS
April 2018
Visual Engineering
Video solutions. Integrated
visualengineering.co.uk
Page 14
The Status - Spectra Tab
1. The Spectra Displays
3. Interference
There are two displays labelled A and B which show the spectra being received on the two diversity
antennas of the node that is being interrogated.
In the above example there is a valid COFDM signal being received on Input A of -36dB. The second
antenna, Input B, is showing no signal. It can be assumed, therefore, that the second antenna is not
connected.
If the Interference button is selected the display shows the spectra when none of the nodes in the
mesh are transmitting. This enables the user to look for interference on the system frequency that
is to be used.
In an ideal clean RF environment, with no interference, the user will see a spectra for both inputs as
shown above for Input B of -96dB.
There could be several nodes transmitting on the mesh so we need to define which node we are
looking at. This is done with the radio buttons on the left side of the spectra display.
In our example there is only one node on the network, the CCTV Node. This is the one that has
been selected.
2. Node Selection
1
2
3
