R&S ESU Series Operating Manual page 60

R&S ESU
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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.
MAX PEAK
MIN PEAK
QUASIPEAK
AVERAGE
CISPR AVERAGE
RMS
CISPR RMS
CISPR RBW
UNCOUPLED
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:
Operating Manual 1302.6163.12 - 03
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:
Frequency range
IF bandwidth
Charge time constant
Discharge time constant
Time constant of instrument
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.
Band A Band B
< 150 kHz 150 kHz to
30 MHz
200 Hz 9 kHz
45 ms 1 ms
500 ms 160 ms
160 ms 160 ms
DET:REC POS
Instrument Functions
Receiver Mode
Band C/D
> 30 MHz
120 kHz
1 ms
550 ms
100 ms
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