Common Measurement Settings
R&S
®
ESW
149
User Manual 1177.6298.02 ─ 08
Remote command:
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 25
Ω
in series to the input impe-
dance of the instrument.) The correction value in this case is 1.76 dB = 10
log (75
Ω
/
50
Ω
).
This value also affects the unit conversion.
Remote command:
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]
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
