Rohde & Schwarz ESW Series, User Manual

Page: 122 / 759

Measurements and Result Displays
R&S
®
ESW
122 User Manual 1177.6298.02 ─ 08
Automatically turns the optional low noise amplifier on and off, depending on the
applied signal. This is only possible when the "Auto Range" feature has been
turned on.
●
"Auto Preamp"
Automatically turns the preamplifier on and off, depending on the applied signal.
This is only possible when the "Auto Range" feature (and the preselector) have
been turned on.
Note that when you select a different setting in the "Value" menu while the "Auto"
configuration is on, automatic configuration is turned off.
Example: "Auto" = "Preamp". When you select "Value" = "Preamp", "Auto" turns to
"Off".
Using both preamplifiers at the same time is not possible.
Note that turning on one of the preamplifiers limits the lower frequency (see data-
sheet for details).
Note that if you want to use the standard preamplifier, you have to route the signal
through the preselector.
More information .
Remote command:
Preamplifier:
State (global):
INPut<ip>:GAIN:STATe
on page 509
State (scan range):
[SENSe:]SCAN<sr>:INPut:GAIN:STATe
on page 458
Mode (global):
INPut<ip>:GAIN:AUTO
on page 508
Mode (scan range):
[SENSe:]SCAN<sr>:INPut:GAIN:AUTO
on page 457
Low noise preamplifier:
State (global):
INPut<ip>:GAIN:LNA:STATe
on page 509
State (scan range):
[SENSe:]SCAN<sr>:INPut:GAIN:LNA:STATe
on page 458
Mode (global):
INPut<ip>:GAIN:LNA:AUTO
on page 509
Mode (scan range):
[SENSe:]SCAN<sr>:INPut:GAIN:LNA:AUTO
on page 458
Input Selection ← Configuring scan ranges
Selects the RF input connector you would like to use for a measurement.
Note that you cannot use both RF inputs simultaneously.
Remote command:
Global:
INPut<ip>:TYPE
on page 485
Scan range:
[SENSe:]SCAN<sr>:INPut:TYPE
on page 459
9.3.4 Performing a Peak Search
A peak search is meant to find signal peaks in the spectrum that you are analyzing.
The results of the peak search are written into a peak list, which in turn is the basis for
a final measurement.
This approach reduces the efforts required for the final measurement in that you have
to test only a few selected frequencies that probably carry interfering signals.
Test Automation