User Manual

SGD-SB2025NT-TUM, Part 2
Jan 12 Page 44 SOLAR COMMISSIONING
Note.
A change in the coarse gain setting will cause the PLL to show an error and possibly
an alarm for a short duration.
5.2.1.5 In Route
The ‘In Route’ functions available for an Analogue system are shown below in Figure 33 . For a
P25 system, only the inhibit function is available. Details of the functions are:
(a). Invert . When the ‘Invert’ option is selected, the phase of the audio input signal will be
inverted (phase reversal). Whilst this function is not normally required, it does provide a
useful facility in the advent that the audio wiring between NI and base station is suspected as
being reversed.
(b). Inhibit . When the ‘Inhibit’ option is selected, the audio signal fed in will be inhibited in the NI,
which will cause a flashing Red warning indication on the front panel LED Status indicators.
Depending upon the operational mode and setup configuration of the NI, these inhibits will
also result in the Tx key or voting functions being inhibited, i.e. all associated input signalling
will also be inhibited.
(c). 2.6KHz LP Filter . When this option is selected, the incoming audio will be low-pass filtered
to 2.6 kHz to prevent signalling tones such as tone RSSI or transmit keytone from passing
through Solar.
Figure 33. In Route functions.
5.2.1.6 Out Route
The ‘Out Route’ functions available for an Analogue system are shown below in Figure 34 . Again,
for a P25 system, only the inhibit function is available. Details of the functions are:
(a). Invert . When the ‘Invert’ option is selected, the phase of the audio output signal will be
inverted (phase reversal). Whilst this function is not normally required, it does provide a
useful facility in the advent that the audio wiring between NI and base station is suspected as
being reversed.
(b). Inhibit . When the ‘Inhibit’ option is selected, the audio and any associated signalling that is
output from the NI will be inhibited and a flashing Red warning indication will be visible on the
front panel LED Status Indicators.
Figure 34. Out Route functions.