
4.
Perform the sweep on the known signal again with the new sweep
time setting and measure the amplitude of the known signal.
5.
Compare the results of the two measurements. If the new value is
within 0.6 dB of the original value, the new sweep time will not affect
the system accuracy.
NOTE
If the above criterion is not met, the system accuracy
specification will apply only to the measured noise and not
to spurs.
Using this procedure, the value of the sweep time can be iterated for the
fastest possible measurement time and the greatest accuracy. Faster sweep
times will cause spurs to be measured low but noise measurements will
not be affected. Note that since the HP 3048A computation time for the RF
segments may be 20 to 30 seconds, faster sweeps may not improve overall
measurement speed significantly. The default segment table has been set
up to optimize measurement speed while maintaining system accuracy.
6-28 RF Analyzers
Comentarios a estos manuales