OM POWER OM2000A+ Tuning Procedure And Part List page 3

b. Tuning procedure
OM2000A+ has been design to deliver maximum output power at 50 Ohms load. To deliver
maximum output to real load you need to adjust the tuning according to your real antenna
impedance.
M-TUNE means entry to the manual tuning mode. It allows fine tuning of PA, or in the case if
tuning cannot set optimal adjustment of the PA. For proper adjustment we need to show Screen
current (at least). Prior start M-tune define one bar graph to the Screen current, or define all bar
graph as in the next picture.
Press M-TUNE. New screen is visible. Slides on the left and right side represent both variable
capacitors.
Adjustment process: Move TUNE left or right until maximum of FWD power reached. Then
move LOAD carefully so that Ig2 Screen current will be not higher than 20mA. Optimum
means maximum FWD power and Screen between 10 – 20mA for the full power output.
Repeat more times.
Exhibit 11
We are in the operation mode.
Press MENU
Now try to press PTT (foot switch
for example).
We are in the transmit mode
(without RF).
We have new button here. M-
TUNE.
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