Select External Clock Reference Frequency (If Fitted) - Tait TB8100 User Manual

Select external clock reference frequency (if fitted)

Quasi Synch mode
Fan
TB8100 Service Kit User's Manual
The Select external clock reference frequency (if fitted) area (Configure > Base
Station > Miscellaneous) lets you specify the frequency of an external reference
frequency source. If an external source is connected to the reciter, select the
appropriate option to tell the base station what the source's frequency is.
If the base station is part of a simulcast system, select the Quasi Synch mode
check box. This changes the characteristics of the transmit synthesiser and
reduces the maximum carrier deviation. It has no effect when the base station
uses its internal reference.
Quasi
Synch Carrier Frequency
Mode
Off Any
On Multiple of 5 kHz or 6.25 kHz
On Not a multiple of 5 kHz or 6.25 kHz <1 Hz
The Fan area specifies how the base station monitors its fans.
Note: Fans used in the TB8100 must have the correct wiring. Power
and ground (2-wire fans) or power, ground and rotation detect (3-
wire fans). Both fans in a subrack should be of the same type.
To configure the monitoring of fans
1. Select Configure > Base Station > Miscellaneous.
2. In the Fan area, specify a number of fan operating hours. When the PA or
PMU fan has actually been operating for this total length of time, the task
manager input PA fan servicing advised or PMU fan servicing advised
becomes true.
3. Create appropriate Task Manager tasks to define how you want to be
notified when a fan needs servicing. For example, Task Manager could start
over-the-air pips.
4. Specify whether the fan type is 2-wire or 3-wire. If you select 3-wire, the
base station will use the third wire as a rotation detector. If it has turned the
fan on but does not detect rotation, it activates the 'Fan failed' alarm.
Maximum Carrier Deviation
(Relative to the Frequency
Reference)
<30 Hz
0 Hz (locked)
Configuring Miscellaneous Items 81