R&S ESU Series Operating Manual page 141

R&S ESU
RF INPUT 1 | 2 The RF INPUT 1/2 softkey selects the RF input.
Input 1 is the default setting. Alternatively, the pulse-resistant input 2 can be used in
a frequency range up to 1 GHz.
REF LEVEL The REF LEVEL POSITION softkey allows the reference level position to be
POSITION entered.
The setting range is from -200 to +200%, 0% corresponding to the lower and 100%
to the upper limit of the diagram.
Remote command:
REF LEVEL
The REF LEVEL OFFSET softkey allows the arithmetic level offset to be entered.
OFFSET This offset is added to the measured level irrespective of the selected unit. The scal-
ing of the y-axis is changed accordingly.
The setting range is ±200 dB in 0.1 dB steps.
Remote command:
Remote command:
GRID The GRID ABS/REL softkey switches between absolute and relative scaling of the
ABS | REL level axis.
GRID ABS is the default setting.
ABS
REL
For setting RANGE LINEAR (linear scaling, labelling of axes in %) the softkey is not
displayed since the unit % itself implies a relative scale.
Remote command:
The RF INPUT 50 Ω / 75 Ω softkey switches the input impedance of the instrument
RF INPUT
between 50 Ω (= default setting) and 75 Ω.
50 Ohm |
75 Ohm
The setting 75 Ω should be used if the input impedance (50 Ω) is transformed to 75
Ω using the corresponding adapter unit of type RAZ (= 25 Ω in series to the input
impedance of the R&S ESU). The correction value used for the adoption is 1.76 dB
= 10 log (75Ω / 50Ω).
All levels specified in this operating manual refer to the default setting of the instru-
ment (50 Ω).
Remote command:
RANGE LOG The RANGE LOG 100 dB softkey sets the level display range to 100 dB.
100 dB
Remote command:
4.110
DISP:WIND:TRAC:RPOS 100PCT
DISP:WIND:TRAC:RLEV:OFFS -10dB
The labelling of the level lines refers to the absolute value of the reference
level.
The upper line of the grid is always at 0 dB.
The scaling is in dB whereas the reference level is always in the set unit
(dBm, dBmV,..).
DISP:WIND:TRAC:Y:MODE ABS
INP:IMP 50OHM
DISP:WIND:TRAC:Y:SPAC LOG
DISP:WIND:TRAC:Y 100DB
Instrument Functions
Analyzer Mode
Operating Manual 1302.6163.12 - 03