108 Working with Base Stations from Your PC TB9300 Installation and Operation Manual
© Tait International Limited April 2024
5.4.13 Single or Channel Group Base Stations
Base stations can operate singly, or as part of a simulcast or voted channel
group. Channel group operation is enabled in the channel group profile:
(Configure > Channel Group > [name]), and the channel group that is in-
use is selected in the channel table (Configure > Base Station > Channels
> [name]). For more details, see the DMR Simulcast and Voted Channel
system manual.
5.4.14 Marshaling or Transmit Delay
As an IP connected base station, transmitters must buffer the signal to be
transmitted so that variations in delay in the IP network do not cause the
transmitter to underrun.
Non-simulcast channels use a configurable transmit delay. The amount of
transmit delay required varies with the QoS (specifically jitter) of the IP
transmission network.
Transmitters in a simulcast channel must all begin transmitting
simultaneously, therefore the configured value of the marshaling duration
must allow for the worst case of network delay, including delay variation
(jitter).
The table below provides a summary of where to configure transmit or
marshaling delay:
See the base station help for more information on configuring transmit or
marshaling delay (MBC-00006-xx).
Channel type Configured value Notes
Single base station, DMR
(conventional, trunked)
Configure > Network Interfaces >
DMR Network
Rounded up to 60 ms
Single base station, MPT Configure > Network Interfaces >
MPT Network
Rounded up to 60 ms
Simulcast channel, DMR
(conventional, trunked)
Configure > Channel Group
[name] > Synchronized – network
> Fixed duration
Rounded up to 60 ms
Non simulcast voted channel,
DMR (conventional, trunked)
Configure > Channel Group
[name] > Unsynchronized local Tx
delay
Rounded up to 60 ms
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