HP 8568B Spectrum Analyzer Installation and Verification Manual

6. Resolution

Bandwidths

Specification

Bandwidth

Amplitude

Selectivity

10 Hz to 3 MHz; *20%

3

kHz to 1 MHz; flO%

(Referenced to 1 MHz amplitude)

3

MHz; fl.O dB

1 MHz to 100 Hz; f0.5 dB

30

Hz; AO.8 dB

10 Hz; f2.0 dB

(60 dB/3 dB Ratio)

3

MHz to 100 kHz; <15: 1

30

kHz to 10 kHz; <13: 1

3 kHz to 30 Hz; <ll:l

10 Hz; ~100 Hz separation of 60 dB points

Related Performance

Tests

Description

Note

Resolution Bandwidth Accuracy Test

Resolution Bandwidth Selectivity Test

Resolution Bandwidth Switching Uncertainty Test

A signal source is connected to the spectrum analyzer input. The analyzer steps through the bandwidths from 3 MHz to 10 Hz, centers the signal, sets signal peak near the reference level, and measures the frequency of the 3 dB points for each bandwidth. The 3 dB bandwidth is

then

calculated by determining the difference in frequency between the 3 dB points.

Next, the spectrum analyzer steps through the bandwidths and measures the frequency of the 60 dB points of each bandwidth. The

60 dB bandwidth is then calculated by determining the frequency difference between the 60 dB points.

The shape factors are calculated by dividing the 60 dB bandwidths by the 3 dB bandwidths.

This procedure is for instruments other than those having Option 462.

For Option 462 instruments perform the test on the following page.

5-16 Operation Verification