B&K Precision 2658A - Manual - Manual (Page 59)

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7. Moreover, measure the frequency detected in the above with QP or AV detection, then the SPAN is
200 kHz and the SWEEP is 10 sec.
Radiated Emission Measurement
The electric field strength of disturbance noise that EUT radiates in the air is measured.
1. Set the compensation data of the antenna beforehand.
Refer to “25.8 Writing original compensation data” for the details.
2. Turn on the power of the 2651 after connection.
3. Set the initial parameters of radiated emission measurement by pushing
. The setting parameters are as follows.
Center Frequency : 515 MHz
Frequency span : 1 GHz
RBW : 120 kHz
VBW : 1 MHz
Sweep time : 0.3 sec
Detection mode : Positive peak mode
4. Confirm whether the connection and the operation are correct by supplying the power to the EUT and
measuring.
5. Set the number of times of the sweep in the MAX HOLD mode by operating
.
6. Search the frequency of disturbance noise that exceeds the QP limits by using the marker function.
7. Set the center frequency to the point that exceeds the limits, the SPAN to 50MHz and the SWEEP to
30 msec. And measure the frequency accurately.
8. Moreover, measure the frequency detected in the above with QP detection, then the SPAN is 1MHz
and the SWEEP is 30 sec.
Antenna
2651
EUT
F6 SAVE/LOAD F3
F2
CALC