Common Measurement Settings
R&S
®
ESW
149User Manual 1177.6298.02 ─ 08
Remote command:
INPut<ip>:COUPling on page 485
Impedance
For some measurements, the reference impedance for the measured levels of the
R&S ESW can be set to 50 Ω or 75 Ω.
Select 75 Ω if the 50 Ω input impedance is transformed to a higher impedance using a
75 Ω adapter of the RAZ type. (That corresponds to 25Ω in series to the input impe-
dance of the instrument.) The correction value in this case is 1.76 dB = 10 log (75Ω/
50Ω).
This value also affects the unit conversion.
Remote command:
INPut<ip>:IMPedance on page 485
Pulse Limiter
The pulse limiter, available for the second RF input, is a protection mechanism against
high level pulses or signals (which can damage the input mixer).
When you turn on the pulse limiter, the attenuation is always at least 10 dB. Attenua-
tion smaller than 10 dB is only available when you turn off the pulse limiter.
Remote command:
INPut<ip>:ATTenuation:LIMiter[:STATe] on page 486
10.6.2 Configuring the Preselector
Access: "Overview" > "Input" > "Preselector"
Preselector settings allow you to configure the signal path up to the input mixer, espe-
cially the preselector characteristics.
The orange arrow in the dialog box represents the current signal path. Grey arrows
represent other possible signal paths.
Data Input and Output
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