Receiver Mode
R&S
®
ESR
171
User Manual 1175.7068.02 ─ 12
Table 5-1: RMS Average detector
Band A
Band B
Band C/D
Band E
Frequency range
<
150
kHz
150
kHz to 30
MHz
30
MHz to 1
GHz
>
1
GHz
Resolution band-
width
200
Hz
9
kHz
120
kHz
1
MHz
Time constant of
the mechanical
device
160
ms
160
ms
100
ms
100
ms
Corner frequency
10
Hz
100
Hz
100
Hz
1
kHz
Regarding measurement time, see CISPR Average detector.
Measurement times shorter than 20 ms
With measurement times shorter than 20 ms the detector weighting changes to plain
RMS weighting.
5.2.3
Trace Modes
The traces can be activated individually for a measurement or frozen after a measure-
ment has been performed. Traces that are not active are not visible. Each time the
trace mode is changed, the selected trace memory is cleared.
Note that in Spectrum mode, the Max Hold and Min Hold modes are unavailable for
statistics measurements.
Clear Write
Overwrite mode: the trace is overwritten by each sweep. This is the default setting.
All available detectors can be selected.
Remote command:
DISP:TRAC:MODE WRIT
, see
DISPlay[:WINDow<n>]:TRACe<t>:MODE
Max Hold
The maximum value is determined over several sweeps and displayed. The R&S
ESR
saves the sweep result in the trace memory only if the new value is greater than the
previous one.
This mode is especially useful with modulated or pulsed signals. The signal spectrum
is filled up upon each sweep until all signal components are detected in a kind of enve-
lope.
Remote command:
DISP:TRAC:MODE MAXH
, see
DISPlay[:WINDow<n>]:TRACe<t>:MODE
Measurement Basics
