什么是扫描或扫频速率（Sweep or Scan rate）？
扫描或扫频的跨度Span除以扫描或扫频的时间！The scan rate of a spectrum analyzer or a scanning measuring set should be adjusted for the
CISPR frequency band and the detection mode used.
The minimum sweep time/frequency or the fastest scan rate is listed in the following table:
最小扫描时间/频率即最快扫描速率
FrequencybandPeak-detectionQuasi-peakdetection
A9 kHz – 150 kHz100 ms/kHz20 s/kHz
B0,15 MHz – 30 MHz100 ms/MHz200 s/MHz
C/D30 MHz – 1 000 MHz1 ms/MHz20 s/MHz
For a spectrum analyzer or scanning measuring set used in a fixed tuned non-scanning mode,
the display sweep time may be adjusted independently of the detection mode and according to
the needs for observing the behaviour of the emission. If the level of disturbance is not steady,
the reading on the measuring set must be observed for at least 15 s to determine the maximum.
Minimum scan times for the three CISPR bands with peak and quasi-peak detectors
使用峰值和准峰值检波器时的最小扫频时间Ts
FrequencybandScan time Tsfor
peak detectionScan time Tsfor
quasi-peak detection
A9 kHz – 150 kHz14.1 s2820 s = 47 min
B0,15 MHz – 30 MHz2.985 s5 970 s = 99.5 min =1 h 39 min
C/D30 MHz – 1 000 MHz0.97 s19 400 s = 323.3 min= 5 h 23 min
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