1 8
b)
You can control the display brightness, Auto-Operate feature, and antenna outputs
assignment also 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, S.5-2, and S.5-3 for details.
4-6. Auto-Protection System
When any abnormal condition is detected, the amplifier will evaluate the risk and may use
three different degrees of protection, depending on the nature of the problem. Each event is
accompanied by a text telling you the reason. The VFD brightness is flashed meanwhile in
order to attract the operator's attention.
a)
The first degree of protection is issuing a warning message only, without any influence on
the transmitting process. This might be for instance "Reduce Drive", "Plate Current", etc. You
could continue to transmit under such conditions but you are close to a trip threshold.
b)
The second degree of protection is a trip in standby mode (Soft Fault). You'll get an
appropriate message, for instance ** GRID CURRENT **. All Soft-Fault messages are marked
with two asterisks on both screen edges. The message remains on the display until you press
any button (or auto-operate function returns to operate mode automatically). The Soft Faults
are of such kind where you can correct exploitation conditions operatively (using less drive,
improving antenna VSWR, etc).
c)
The third degree of protection is a trip to OFF LINE mode (Auto-Protection).
You'll get the corresponding signature (see S.6-5 - Troubleshooting). If you cannot guess
what the reason is, you may try to turn the amplifier on again in order to check whether it's
not an accidental condition. If the problem persists, you'll need to contact your dealer - see
S.I-2.
N O T E
The 6dB input attenuator is automatically inserted about one second after
a bad tuning is detected at drive levels above 20W. It is switched off at
every PTT release (unless inserted manually).
Содержание 1500
Страница 4: ...4 ...