TB9400/TN9275 Installation and Operation
Working with Base Stations from Your PC
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© Tait International Limited
May 2023
The chart displayed on the Signal Level page has two lines. One shows the
current RSSI measurement for the selected frequency. The second shows a
historical trace of peak RSSI readings on that frequency.
5.4.15
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:
Channel type
Configured value
Single base station, P25 (Phase 1)
Configure > Channel Group
Single base station, AS-IP
Configure > Channel Group
Simulcast channel, P25 (Phase 1)
Configure > Channel Group
Non-simulcast voted channel, P25
(Phase 1)
Configure > Channel Group
Single base station, DMR (conventional,
trunked)
Configure > Network Interfaces > DMR
Network
Single base station, MPT
Configure > Network Interfaces > MPT
Network
Simulcast channel, DMR (conventional,
trunked)
Configure > Channel Group
Non simulcast voted channel, DMR
(conventional, trunked)
Configure > Channel Group
