Protection Circuits; Indicators - OM POWER OM2200A Manual

1.2.2. Protection Circuits

There are 8 special protection circuits used in the amplifier. They are activated when one or
more of next parameters exceed defined values or some unwanted occasion occurs.
 VSWR too high
 Anode current too high
 Screen current too high
 Grid current too high
 Mistuning of PA
 Hot switching protection
 Soft start for protecting your fuses
 "switch-on blocking " at opened amplifier

1.2.3. Indicators

There are couples of LED and bar graph indicators visible on the front panel to inform you
about value of some parameters or operation status:
Bar graph indicators
LED Indicators
Buttons
OSD Indicator
Power output - 50 LED
Reflected power – 20 LED
Current at screen Ig2 – 10 LED
Anode voltage, anode current, tuning – 30 LED
Current at control grid (Ig1 – 2 LED)
WAIT – preheating of tube (150 sec)
STBY – standby
OPR – operation condition
FAULT – failure, switching off for abt. 4 sec
INHIBIT - operating condition
ANT 1 - which ANT is in use
ANT 2 - which ANT is in use
ANT - ANT selection
UP – DWN - listing in menu
MAN - manual operating
AUTO - automatic operating
TUNE - tuning
SET – confirms selected parameter
LCD Display 2 x 16 characters
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