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    Sam Drazin
    Creating Exclusions
    Topic posted November 23, 2011 by Sam DrazinExpert, last edited December 6, 2013 by AdminProficient, tagged how-to 
    578 Views, 2 Comments
    Title:
    Creating Exclusions
    Description:

    Overview

    Exclusions are inputs into the frequency calculator that disallow active devices and backup frequencies from being tuned to those specific values, and can be specified as single frequencies or frequency ranges. You can create three different types of exclusions:

    • TV Exclusions
    • Scan Data Exclusions
    • Manual Exclusions

    Related Links:

    Creating TV Exclusions

    There are two primary methods which allow you to avoid the RF interference associated with near-by TV stations. The first of which is to use the built-in TV database. This database holds records for a large number of the TV antennas placed throughout the world. From the Frequency Coordination tab, select "Change TV Channels..." to access the TV Management dialog.

    593a77148b_01.png

    This dialog allows you to search by city/postal code, or specify precise latitude and longitude for your particular location. Once a location is established, a list of near-by TV stations will be selected based on the transmit power of the station, and it's proximity to the location specified.

    We'll walk through how to search for a postal code for a given city. First, ensure that "City" is selected as the Location Setup option. Then, choose the country in which you'd like to search.

    593a77148b_02.png

    If you know the postal code of your location, enter it in the Postal Code field, and select "Search".

    593a77148b_03.png

    If you don't know the postal code, enter the city name, and select the appropriate state from the State drop-down. Select "Find Postal Code". This will return a list of all available postal codes for that city in the Postal Code field. Select a postal code, and then select "Search".

    593a77148b_04.png

    Once "Search" has been selected, the TV Channel List will be populated with TV stations that are close enough to cause interference in the specified location. You have just created a list of TV exclusions. You can check additional channels from the list, uncheck some that were automatically selected, and export a list to share.

    Press "Save" to commit these TV Exclusions. Once saved, all checked channels will be completely avoided when calculating frequencies.

    593a77148b_05.png

    The Coordination Plot will reflect any excluded channels with red vertical bars. Each channel that was checked in the TV Management dialog will display one of these bars. The right sidebar will also summarize the total number of TV channels being avoided.

    593a77148b_06.png

    It is important to note that the exclusion ranges from TV exclusions are based on the location of TV channels and the known stations surrounding the location you specify. No live scan data will impact the designation of TV channels when selected from the TV Management dialog.

    To create exclusion ranges based on live scan data from the current RF environment, we'll walk through creating scan data exclusions

    Creating Scan Data Exclusions

    Scan data exclusions are exclusions the calculator will avoid based on scan data levels and the exclusion threshold. Let's define each of those briefly:

    • Scan data: data recorded by a device capable of scanning (AXT400, AXT600, UR4, P10R, etc) and saved in a file format, or displayed in Wireless Workbench live from the device.
    • Exclusion threshold: the threshold which decides whether RF energy at a certain frequency will be avoided or not. This is represented by the red horizontal line in the Coordination Plot within Wireless Workbench.

    Wireless Workbench can be configured to create exclusions when scan data is present in the Coordination Plot automatically. Open the Preferences menu and access the Coordination tab.

    593a77148b_07.png

    The setting is called "Automatically calculate exclusions from scan data". When checked, any scan data in the Coordination plot (the plot view inside the Frequency Coordination tab) will be used to generate a list of exclusion frequencies and ranges.

    Setting the exclusion threshold at different levels will alter the exclusions generated in real-time. This can be verified by changing the exclusion threshold, and noticing the number of excluded frequencies and ranges change in the right sidebar under the Additional Exclusions section.

    593a77148b_08.png

    All generated exclusions will be listed in the Exclusions dialog, accessible by selecting "Change Exclusions...". Here, you can enable/disable exclusions by selecting/deselecting them. Exclusion lists can also be exported and imported from this dialog.

    593a77148b_09.png

    Creating Manual Exclusions

    From the Exclusions dialog, you can add exclusions manually. Exclusions can be single frequencies, or frequency ranges. To add an exclusion, select "Change Exclusions..." from the Frequency Coordination right sidebar.

    593a77148b_10.png

    You will be presented with the current list of exclusions. To add a manual exclusion, select "Add New Row". A new row will be added to the bottom of the list.

    Select the type of exclusion as either a frequency (to avoid a single frequency value), or range (to avoid all frequencies between two frequency values, including the bounds).

    593a77148b_11.png

    For single frequency exclusions, only enter a value in the "Start" column. Ranges will require values in both the "Start" and "Stop" columns. Notice that the value of the "Source" field for the added row is "User Defined", indicating that this is a manually added exclusion.

    Press "Save" when you are done adding exclusions.

    Answer

     

    • rolmat
      Hi Sam,

      I'm wondering where and how the TV-channel database is located, and editable (updateable) ?
      Its a great feature, but is there a way to check how valid the data at any given moment is ?

      i just checked the database against what I know locally (a lot of changes just happened because of LTE) and know for a fact the data is not up-to-date. No problem, but how can I get a picture, and even better improve on the reliability of the database ?

      Thanks
      Roland (roland@aem.nl)
    • hautzir
      Hi Roland,

      The TV database depends on a certain kind of software version. So, it is actually not editable by any user. The content information depends on the information we receive from the accoriding distributor. In this case Shure Distribution Netherlands would be in charge. Please contact them to edit information related to the new information you have. Here's their contact information:

      Shure Distribution Netherlands b.v.
      Erasmusweg 15
      4104 AL Culemborg
      Nederland
      Tel: 0031-345-638888
      Fax: 0031-345-638889

      E-Mail: info@shuredistribution.nl
      Internet: www.shuredistribution.nl

      Thanks.

      Ron

     

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