HP 8568B manual Impulse and Resolution Bandwidth Selectivity Test

5. Impulse and Resolution Bandwidth Selectivity Test

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Figure 4-5. 60 dB Bandwidth Measurement

4.Press MARKER In] and position the positive movable marker 60 dB down from the signal peak on the negative-going edge of the signal trace (the MARKER @J amplitude readout should be 0.00 dB *0.50 dB).

5.Read the 60 dB bandwidth for the 3 MHz resolution bandwidth setting from the MARKER Ia] frequency readout (see Figure 4-5) and record the value in Table 4-5.

6.Select the spectrum analyzer @iE%V], ~FREQUENCY SPAN), and

CV’DEO] according to Table 4-5. Measure the 60 dB bandwidth for each resolution bandwidth setting by the procedure of steps 3 through 5 and record the value in ‘fable 4-5.

7.Record the 6 dB bandwidths for each resolution bandwidth setting from Table 4-3 in Table 4-5.

8.Calculate the bandwidth selectivity for each setting by dividing the 60 dB bandwidth by the 6 dB bandwidth. The bandwidth ratios should be less than the maximum values shown in ‘fable 4-5.

9.The 60 dB bandwidth for the 10 Hz resolution bandwidth setting should be less than 100 Hz.

4.14 Option 462