User Manual

SGD-SB2025NT-TUM, Part 2
Jan 12 Page 29 TM ET
3.4 L OWER A REA
3.4.1 TM Status Panel
The TM Status panel is selected by selecting the ‘TM’ tab (indicated in Figure 17 below). The
example shown below in Figure 17 is of a TM with the maximum number of channels enabled; a
typical TM configuration is likely to have many fewer channels. When used with a Solar 2 P25
system, a maximum of four channels can be enabled (see Figure 18 ).
Figure 17. TM Status Panel.
Figure 18. TM Status Panel for P25 system.
The status indications presented on this panel and the configurable settings accessed through the
buttons on this panel are global for the TM, i.e. they are common to all Channels and all NI.
Summary details of each item in this panel are provided in the following sections although the user
may be directed to other sections in this manual for more comprehensive information.
3.4.1.1 Duplication
A normal operating state is indicated by a Green status indicator, an abnormal state by a Red
indicator. See Section 8.2.4 – Duplication Status for full details.
3.4.1.2 Timing
A normal operating state is indicated by a Green status indicator, an abnormal state by a Red
indicator. If the timing signal source is a GPS receiver with NMEA data output, the number shown
alongside the indicator is the number of satellites (Space Vehicles) being used to acquire a fix or
the number in use once the fix has been acquired.
Whilst the TM is designed to operate with a global timing signal, it is able to continue operation
without it, since the TM clock timing is not critical to delivering synchronised audio. Under this
situation, the TM will adjust its clock to maintain consistent PAT timing reports from NIs that have
the global timing signal. This is indicated by the text ‘NI’ replacing that of the ‘SV’ number
alongside the indicator which will remain lit Red .
Loss of the timing signal may be assigned to “Alarm” status – see Section 12 – Alarms .