R&S FSW Series, Руководство пользователя

Страница: 424 / 1450

Common Measurement Settings
R&S
®
FSW
424 User Manual 1173.9411.02 ─ 43
LO Level
Defines the LO level of the external mixer's LO port. Possible values are from
13.0
dBm to 17.0 dBm in 0.1 dB steps. Default value is 15.5 dB.
Remote command:
[SENSe:]MIXer<x>:LOPower
on page 1076
Signal ID
Activates or deactivates visual signal identification. Two sweeps are performed alter-
nately. Trace 1 shows the trace measured on the upper side band (USB) of the LO (the
test sweep). Trace 2 shows the trace measured on the lower side band (LSB), i.e. the
reference sweep.
Note that automatic signal identification is only available for measurements that per-
form frequency sweeps (not in the VSA, the I/Q Analyzer, or the Real-Time Spectrum
application, for instance).
(See also "Automatic Signal Identification" on page 414).
Mathematical functions with traces and trace copy cannot be used with the Signal ID
function.
Remote command:
[SENSe:]MIXer<x>:SIGNal
on page 1076
Auto ID
Activates or deactivates automatic signal identification.
Auto ID basically functions like Signal ID . However, the test and reference sweeps are
converted into a single trace by a comparison of maximum peak values of each sweep
point. The result of this comparison is displayed in trace 3 if "Signal ID" is active at the
same time. If "Signal ID" is not active, the result can be displayed in any of the traces 1
to 3. Unwanted mixer products are suppressed in this calculated trace.
Note that automatic signal identification is only available for measurements that per-
form frequency sweeps (not in vector signal analysis or the I/Q Analyzer, for instance).
Note: The "Auto ID" function is now also available for Spectrum Emission Mask (SEM)
Measurement and Spurious Emissions Measurement using an external mixer.
(See also "Automatic Signal Identification" on page 414).
Remote command:
[SENSe:]MIXer<x>:SIGNal
on page 1076
Auto ID Threshold
Defines the maximum permissible level difference between test sweep and reference
sweep to be corrected during automatic comparison (
"Auto ID" on page 424 function).
The input range is between 0.1 dB and 100 dB. Values of about 10 dB (i.e. default set-
ting) generally yield satisfactory results.
(See also "Automatic Signal Identification" on page 414).
Remote command:
[SENSe:]MIXer<x>:THReshold
on page 1077
Data Input and Output