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    Antenna A or B monitoring
    Topic posted April 18, 2013 by HidefpixCompetent 
    836 Views, 4 Comments
    Antenna A or B monitoring
    This is a repost from a different part of the forum.

    We routinely use an Omni antenna on antenna A and a directional on antenna B when we're out in the field with our ULX-D and Axient ATX-600. At the Axient, I can monitor the RF level of either A or B of any of our transmitters, but only at the unit itself. Is there a way to see the same information in WWB6?

    The frequency plot window doesn't seem to be able to discriminate between the antennas. Is there somewhere else I should be looking?



    • Lisa
      I understand that the ULX-D uses a newer technology for antenna diversity but I can't find any documentation of it in the manual. This technology prevents polling each antenna individually. Here's the forum post answering my similar question:

      What is the name of the technology the ULX-D uses for antenna diversity? How does it different than the technology that the UHF-R's used?
    • buhmanb
      ULX-D uses spatial antenna switching diversity. The switching is controlled by algorithms in the FPGA. The RF meters are taken after the switching.

      Axient AXT400, UHF-R have individual meters for each antenna.

      The WWB6 Frequency Plots will display the max of the 2 antennas.

      The two most applicable features in WWB6 would be:
      1. RF History Plot - which can be used to plot the RF signal strength as seen by the receiver over time. For UHFR, AXT400 both antennas are plotted, for ULXD only 1 value is plotted.
      2. RF Meters - that can be seen for receivers in their respective Property Panel and Channel Strip. These correspond to the RF meters on the front panel of the units.

      WWB6 currently does not use the AXT600 for those features.
    • Manuel Tapia
      Let's say that I'm using the system in the proper way and I need to check which is the effect of one antenna and the other by disconnecting one at the time, Should I see a change in color of the trace while in History Plot ? In such a way to see if both antennas are working properly.
    • admin1
      Hi Manuel,

      Unfortunately, that method won't help you either. Since the ULX-D is a single receiver device, there is only the single stream of data for received RF signal. So disconnecting one antenna would still result in one line being displayed in the software. The only difference is that if the receiver tried to switch antennas, you would probably see a dropout reflected in the display!

      The only way to know if both antennas are working properly is if you unplug one antenna, and the RF signal drops completely (or significantly), then that means the receiver is not getting usable signal from the other antenna.


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