OM POWER OM2000A+ Manual page 30

Press PTT, check the Ig2 (I Screen on the display). If it is ok (0-20mA), gradually increase the
•
input power until the PA reaches about 70% of its maximum output power.
Using the TUNE buttons, adjust for maximum FORWARD POWER while monitoring the Screen
•
current.
When the Screen current exceeds +20mA, adjust the LOAD button to decrease Screen current
•
to about 0 mA.
Increase the PA input power until you reach the desired maximum output power. Keep watching
•
the Screen current. If the Screen current exceeds +20mA decrease it by using the LOAD
button.
Repeat using the TUNE buttons to reach desired maximum FORWARD POWER and check
•
Screen current.
If the Screen current is lower than 0 mA (negative value), change it by pressing the LOAD
•
button until 0 mA is set and check again for maximum output power. Do not start with very low
input power, set abt. 50% before beginning M-tune process.
If you reached the desired maximum output power, and the PA Screen current is inside 0 /
•
+20mA, then press the SAVE button.
Notice 1: If the tuning process takes more than 1 minute, allow for a short break to prevent
temperature overloading of the PA.
Notice 2: If you use the PA with the output power adjusted lower than the maximum settings , Screen
current can take negative values. There is no need to readjust the PA, it is still working in the linear
mode.
If the amplifier demonstrates any malfunctions during tuning or it does not behave in
accordance witch the M-TUNE procedure, interrupt the tuning procedure immediately and check
the amplifier! Be sure there are not any mistakes in choosing antennas, bands or segments!
Insure that VSWR is not higher than 3:1 and input power is LOW!
We can now see a new small yellow USER
window in the touch screen display. USER
means that we used the M-TUNE feature to
Type of supported TCVR and
optimize the PA adjustment.
If you want to go back to the default factory
frequency are visible on the
settings, use CLEAR USER SETTINGS in
the MENU settings (page 19) for one band
or all bands.
AUTO LED is ON.
working
display.
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