Technical data

116 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
5 Det/Demod
Quasi Peak
Selects quasi peak detection. This is a fast-rise, slow-fall detector used in making CISPR
compliant EMI measurements. Quasi peak detection displays a weighted amplitude using
specific charge, discharge, and meter-movement time constants as described in CISPR
Publication 16.
Key Path: Det/Demod, Detector
Dependencies/Couplings: Whenever the quasi peak detector is selected, the
resolution bandwidths available will be the CISPR set described in the tables below. If the
Auto, FFT & Sweep setting is Manual:FFT Quasi Peak is grayed out.
Table 2 CISPR Bandwidths with
RBW Set to Auto
Band Start Frequency Stop Frequency Bandwidth
A 10 kHz 150 kHz 200 Hz
B 150 kHz 30 MHz 9 kHz
C & D 30 MHz 1 GHz 120 kHz
Table 3 CISPR Bandwidths with RBW Set to Manual
RBW, Hz Type Equivalent
− 3 dB BW Filter
10 − 6 dB 6.8 Hz
30 − 6 dB 20 Hz
100 − 6 dB 68 Hz
200 CISPR 150 Hz
300 − 6 dB 200 Hz
1 k − 6 dB 680 Hz
3 k − 6 dB 20 kHz
9 k CISPR 6.2 kHz
30 k − 6 dB 20 kHz
120 k CISPR 75 kHz
300 k − 6 dB 200 kHz
1 M CISPR 680 kHz
3 M − 6 dB 2 MHz
10 M − 6 dB 8 MHz