Operating Manual 1302.6163.12 - 03 4.29
R&S ESU Instrument Functions
Receiver Mode
• The quasipeak detector yields the maximum detected value weighted to CISPR
16. Depending on the set frequency, the R&S ESU automatically selects the
detectors and IF bandwidths defined for bands A, B and C/D listed in the following
table:
For frequencies above 1 GHz, the R&S ESU uses the 120 kHz bandwidth of band
C/D.
The coupling of the IF bandwidth to the frequency range with activated quasipeak
detector can be cancelled using the CISPR RBW UNCOUPLED softkey.
• The input signal of R&S ESU can be displayed weighted by three detectors
simultaneously.
Multiple detection is important in EMI measurements since, for example, civil stan-
dards specify limits for both the quasipeak and the average value. Thanks to the
multiple use of detectors, only one test run is needed. The peak detector can be
combined with any other detector since it is the fastest detector and therefore ideal
for overview measurements.
DETECTOR
The DETECTOR softkey opens a submenu to select the detector and combinations
of detectors.
The detector type is set for the bargraph measurement and is displayed after the
selection. Up to three detectors can be displayed simultaneosly.
A maximum of three detectors can be switched on simultaneously.
This softkey is also available in the RECEIVER / MEAS menu.
MAX PEAK The MAX PEAK softkey activates the max peak detector.
Remote command: DET:REC POS
Band ABand BBand C/D
Frequency range < 150 kHz 150 kHz to
30 MHz
> 30 MHz
IF bandwidth 200 Hz 9 kHz 120 kHz
Charge time constant 45 ms 1 ms 1 ms
Discharge time constant 500 ms 160 ms 550 ms
Time constant of instrument 160 ms 160 ms 100 ms
MAX PEAK
MIN PEAK
QUASIPEAK
AVERAGE
CISPR AVERAGE
RMS
CISPR RMS
CISPR RBW
UNCOUPLED
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