Spectrum Measurements
R&S
®
ESR
356User Manual 1175.7068.02 ─ 12
The setting 75 Ω should be selected if the 50 Ω input impedance is transformed to a
higher impedance using a 75 Ω adapter of the RAZ type (= 25 Ω in series to the input
impedance of the instrument). The correction value in this case is 1.76 dB = 10 log (75
Ω/50 Ω).
All levels specified in this Operating Manual refer to the default setting of the instru-
ment (50 Ω).
Remote command:
INPut:IMPedance on page 670
6.2.4.2 Specifying the Amplitude
1. Set the reference level, offset and position using the "Ref Level", "Ref Level Offset"
and "Ref Level Position" softkeys (see "Ref Level" on page 352, "Ref Level Offset"
on page 354 and "Ref Level Position" on page 355).
2. Select the level range and the unit for the level axis using the "Range" and "Unit"
softkeys (see "Range" on page 352 and "Unit" on page 354).
3. Set the scaling using the "Ref Level Position" and/or "Grid Abs/Rel" softkeys (see
"Ref Level Position" on page 355 and "Grid Abs/Rel " on page 355).
4. Set the attenuation using the "RF Atten Manual" or "RF Atten Auto" (see "RF Atten
Manual" on page 181 and "RF Atten Auto" on page 354.
5. Define the RF input coupling using the "Input (AC/DC)" softkey, or a reference
impedance using the "Input (50Ω/75Ω)" softkey (see "Input (AC/DC)" on page 187,
"Input 50 Ω/75 Ω " on page 184).
6. Activate or deactivate the RF Preamplifier using the "Preamp" softkey (see "Pre-
amp On/Off" on page 181).
6.2.5 Defining Automatic Settings – AUTO SET Key
The "Auto Set" menu allows you define automatic settings for measurements quickly.
To open the Auto Set menu
●
Press the [AUTO SET] key.
The "Auto Set" menu is displayed.
Menu and softkey description
●
Chapter 6.2.5.1, "Softkeys of the Auto Set Menu", on page 356
6.2.5.1 Softkeys of the Auto Set Menu
The following table shows all softkeys available in the "Auto Set" menu. It is possible
that your instrument configuration does not provide all softkeys. If a softkey is only
Configuration
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