23
Using foot switch in „KEY IN” we
activated transmitting mode of the PA
first.
“ON AIR” LED is ON.
EBS is active (Ip = 20mA)
In the transmitting mode all 4 buttons
(S1, S2, S3, and S4) are blocked!
An example of standard tuning procedure
using Analog wattmeter.
5.4.
Tuning of the Power Amplifier
The power amplifier is operated in class AB. Thus it’s possible to obtain a maximum output
power at excellent linearity. For this purpose the amplifier has to be tuned carefully
.
CAUTION
The operation of a mistuned PA will cause malfunctions, the increase of grid current and problems
with TVI/BCI.
CAUTION
If the input power is higher than 10W and the power amplifier is NOT correctly tuned, the safety
devices will switch it to STBY.
After switching the amplifier to STBY, you need to switch it back to
the
OPER
mode by pressing
RESET
button shortly.
Type of supported TCVR and working
frequency are visible on the display.
AUTO LED is ON.
Type of supported TCVR and working
frequency are visible on the display.
AUTO LED is ON.
Summary of Contents for OM2000+
Page 35: ...34...