Mode1
8901B
Operation
RF
Level
FUNCTIONS
Special Fbnction 35 (RF Level)
DESCRIPTION
The RF Level function enables the Modulation Analyzer to measure and display the peak, RF power.
RF level measurements are initiated with Special Function
35
or with the
RF
POWER key when there
is
no sensor at the Modulation Analyzer's SENSOR input.
RF level measurements are not calibrated,
so
they are not as accurate
as
measurements made with an
external power sensor
as
with RF Power measurements. (Refer
to
RF
Power
on page
3-71.)
PROCEDURE
To make a broadband RF power measurement with
an
RF cable connected from the signal source
to
RF INPUT (rather than a power sensor connection), select RF POWER.
To
make the measurement with the power sensor connected, key in
35.0
SPCL.
HP-IB PROGRAM CODES
LIN
=
LN
LOG
=
LG
RF POWER
=
M4
SPCL
=
SP
MEASUREMENT TECHNIQUE
The broadband
RF
power at RF INPUT is detected by an RF peak detector. The output of the detector
is
measured and displayed.
When RF Level is selected, the Modulation Analyzer sets
its
RF input attenuation
to
50
dB
to
minimize
SWR. Any manual setting of RF input attenuation (Special hnckon
1)
is
overridden.
AND
DISPLAY
t
A
L:
"OLTMETER
1
RF
Level Measurement
Block
Diagram
RF Level 3-85
To Next Page
Loading...
