Setting The Measurement Time - Rohde & Schwarz EMI Test ReceiverESCI Operating Manual

MEAS Key - Receiver

Setting the Measurement Time

The measurement time can be set in steps of 1-2-5 in the range 100 µs to 100 s. A measurement time
of 15 s is available in addition.
The measurement time is the time during which R&S ESCI measures the input signal and forms a
measurement result weighted by the selected detector. The measurement time does not include settling
times of the synthesizer and the IF filter. R&S ESCI automatically waits until transients are over. When
the quasi-peak detector is used, the minimum measurement time is 1 ms. When the CISPR average
detector is used, the minimum measurement time is 100 ms.
With the average, RMS, AC video or min/max peak detector the smallest settable measurement time
depends on the bandwidth.
Bandwidth Shortest measurement time AV, RMS
≤ 10 Hz
1 sec
100 Hz 100 msec
200 Hz 50 msec
1 kHz 10 msec
9 kHz 1 msec
≥ 100 kHz
0,1 msec
RECEIVER menu
MEAS TIME
Effect of measurement time with different weighting modes:
MIN/MAX PEAK measurement:
1166.6004.12
The MEAS TIME softkey activates the entry field for the measurement time.
Note: This softkey is also available in the Receiver menu.
IEC/IEEE-bus command
With peak weighting selected, the maximum or minimum level
during the selected measurement time is displayed. The peak
detector is reset at the beginning of each measurement. At the
end of the measurement time the maximum or minimum level
occurred during the measurement time is displayed. Since the
peak detector of R&S ESCI is a digital detector, discharging is
irrelevant even with long measurement times.
Unmodulated signals can be measured with the shortest possible
measurement time. When pulses are measured, the selected
measurement time must be long enough for at least one pulse to
occur during the measurement time.
4.20
Shortest measurement time PK+, PK-
10 msec
1 msec
1 msec
0,1 msec
0,1 msec
0,05 msec
SWE:TIME 100ms
R&S ESCI
E-2