CMU RF Non Signalling Measurements
1100.4903.12 2.11 E-9
Additional Information... Alternative Settings
and Measurements
... on Step 3
" RF connectors
The RF Connection Control menu configures the input and
output connectors in the RF function group. The four connec-
tors on the front panel differ by their permissible range of in-
put and output powers (see Chapter 4 and data sheet). The
values quoted on the left side are compatible with the rated
specifications.
&
Chapter 4
Settings made in the Connect.
Control menus apply to the entire
function group RF Non Signalling.
# External attenuation
An external attenuation can be reported to the CMU in order
to compensate for known losses between the signal source
and the device under test or the analyzer.
In our example, the (positive) difference between the ana-
lyzer power measured and the generator power can be re-
ported as an external output attenuation at RF 2. The RF
generator increases its level to maintain the commanded
power of
–27 dBm at the analyzer. The nominal generator power set in
the RF level field is thus measured and indicated next to the
Analyzer Power softkey.
Note: RF User Correction
In addition to the static external attenuation set-
tings, the CMU provides a systematic correction of
the generated and measured RF power by means
of user-defined, frequency and level-dependent cor-
rection tables; see section RF User Correction in
Chapter 1.
&
Chapter 4
Note that an external attenuation
reported to the CMU shifts the
nominal permissible ranges of
input and output levels.
To Next Page
Loading...
