R3132 Series Spectrum Analyzer Operation Manual
5.2.5 Resolution Bandwidth Accuracy and Selectivity
5-22
Table 5-8 RBW Selectivity Test Setting
Calculate selectivity
15. Calculate selectivity for each RBW using the following formula, then record its
result on the performance verification record sheet.
Selectivity = (60 dB down width data)/(3 dB down width data)
RBW
Frequency Span
1 MHz
20 MHz
300 kHz
5 MHz
100 kHz
2 MHz
30 kHz
500 kHz
10 kHz
200 kHz
3 kHz
50 kHz
1 kHz
20 kHz