meter in software. Go to the "Configuration" menu and set "SWR/PWR Meter FWD/REV
Swap" to "ON".
PA Power Calibration
What you will need:
1.
Operational PTT switch connected to the microphone/ptt connector or CW
paddles connected to the CW keyer port
2.
An ampere meter OR a power supply with sufficiently accurate current
measurement (minimum resolution 10mA)
3.
A dummy load capable of handling at least 10W or more (20W or more
recommended). If dummy load is not available, an alternative is an antenna (then
calibration should be done only in the antenna bands and with an SWR meter to
verify low SWR)
4.
[Optional] HF Power Meter
5.
[Optional] Oscilloscope
Basic BIAS Adjustment for mcHF RF Board (up to version 0.6)
1.
[Optional] Connect dummy load or antenna. Since no actual RF is being
produced if everything goes right, the mcHF doesn't have to be connected to a
dummy load or antenna. But to play safe, it doesn't hurt and is required for the
next calibration steps anyway.
2.
Connect a microphone or cow paddles to your much.
3.
Put an amperemeter in the positive power supply line (range 2A) and switch on
mcHF
4.
Choose mode
LSB
or
USB
, the band is
not
important.
5.
Make sure nothing is connected to the extern line in port of the TRX.
6.
If you use a microphone wit PTT switch, choose TX audio input to be coming
from one of the "Line In" sources by long pressing M3 (multiple times). The TX
audio source should show L>R (line in right channel) or L>L (line in left channel).
If no microphone is connected, MIC (microphone) TX audio source will work too.
7.
Enter "PA Configuration Menu", "PA Bias".
8.
Setting must be "0" (if not - correct it after pressing PTT briefly).
9.
Press PTT or CW paddle. It is important that
no RF is being produced
.
