Determining the Simulcast Launch Time Delay in Analog IP Simulcast Systems

Prerequisites:

The MLC 8000 Configuration Tool is operational. See procedure Opening the MLC 8000 Configuration Tool.

When and where to use:

Use this procedure to calculate the simulcast launch time delay in an Analog IP simulcast system. Simulcast Launch Time Delay can be calculated by adding the AGU processing delay to the maximum delay that the link delay measurement function of the MLC 8000 Configuration Tool returns.
NoteThis procedure is only applicable to an Analog IP simulcast system.

Procedure:

  1. Determine the maximum delay the link delay measurement function of the MLC 8000 Configuration Too returns.. To begin this process, click Services → Link Delay Measurement.
    NoteThis procedure is most effective when it is run during a period that there is no voice traffic.
    The link delay measurement window opens.
  2. Click Start. Wait about one minute (see the following note).
    NoteIf the network has a constant delay and little to no jitter, one minute or less should be sufficient to wait in order to obtain a reliable measurement. If the network has traffic other than voice traffic that could cause delays, it is necessary to wait a long enough time to ensure that the maximum delay time is encountered and is present when the link delay measurement is sent (for every MLC 8000 Subsite Link Converter (AGU) each 5 seconds).
  3. When you have waited long enough to get a reliable measurement (see the note in step 2), click Stop.
    Each row displays the maximum link delay in milliseconds (as measured by the MLC 8000 Analog Comparator (VGU) from each MLC 8000 Subsite Link Converter (AGU)). The maximum link delay from all the AGUs is displayed in the Max field in the bottom right corner.
  4. Calculate the link launch delay as follows:
    Simulcast Launch Time Delay = 52 msec AGU Processing Delay + Maximum Delay (on the link delay measurement report)