Acom ACOM2100 - ON LINE Information and Controls; Auto-Protection System

15
C A U T I O N
For transmissions longer than 15 minutes the external auxiliary fan must be installed
(see S.2-5).
4-6. ON LINE Information Screens and Control Functions
a) Besides the Warming Up and TRI (described above in S.4-1 and S.4-4), you have 12 more Information
screens available. They are as follows: Forward Power, Reected Power, Output Power (difference
between forward and reected), Antenna VSWR, Drive RF Power, RF Power Gain, Plate Current, High
Voltage, Plate RF Peak, Screen Current, DC Power Input (product of plate current and high voltage),
and Exhaust Air Temperature (Celsius and Fahrenheit scales). You can use them to monitor the technical
state of the amplier and associated parameters, in a digital form.
Selection is made by the PREV and NEXT buttons. You may change the information screens while the
amplier is used and controlled in operate and standby modes, changes transmit and receive, without
any inuence by the measurement process.
b) You can control the Auto-Operate feature and antenna output assignments while ON LINE. In order
to enter the control menu, press the PREV+NEXT buttons simultaneously and hold them for two seconds.
Further proceed as described for OFF LINE mode below - see S.5-1 and S.5-2 for details.
4-7. Auto-Protection System
When any abnormal condition is detected, the amplier will evaluate the risk and may use three different
degrees of protection, depending on the nature of the problem. Each event is accompanied by descriptive
text.
a) The rst degree of protection consists of a warning message only and does not interrupt transmission.
Examples include "Reduce Drive", "Plate Current", etc. You may continue to transmit under such conditions
but you are close to a trip threshold.
b) The second degree of protection is a trip to standby mode (Soft Fault). An example is ** GRID
CURRENT **. All Soft-Fault messages are marked with two asterisks on both screen edges. The
message remains on the display until any button is pressed or until the auto-operate function returns to
“operate mode” automatically. The Soft Faults permit correction by the user, such as by using less drive,
improving antenna VSWR, etc.
c) The third degree of protection is a trip to OFF LINE mode (Auto-Protection). See S.6-5 - Troubleshooting.
If it is not evident why the trip has occurred, you may try to turn the amplier on again. If the problem
persists, you will need to contact your dealer - see S.1-2.
N O T E
The 6dB input attenuator is automatically inserted about one second after faulty tuning
is detected at drive levels above 20W. It is also switched off at every PTT release
(unless inserted manually).