I
-
I
-
Power Keys
(ALC MODE
Ir>
EXT
GAL
This function (selected by pressing
CSHIFT)
[ALC])
is used to calibrate
the RF output power in external (diode and power meter) leveling modes
or&~,
by setting a nominal coupling factor between the RF output and the
external detector. This coupling factor can be adjusted to make the nominal
RF output power agree with the POWER display. This function affects only
the RF output power, by offsetting the ALC reference voltage; it does not
affect the POWER display. When this function is selected, the coupling factor
becomes the active parameter displayed in the MARKER/SWEEP/STATUS area
of the display. The display format is
Coup
Fact.=
XX.
XdB.
A coupling factor
between -30
dB
and +30
dB
can be entered.
Associated SCPI Commands
POWer:ALC:CFACtor
<num>CDBl
Sets the
couping
factor to be used
when the external detector or
power meter
S&ng
is
used.
13-9
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General