Anritsu MS8608A, Руководство по эксплуатации, Страница: 131 / 338

6-19
Section 6 Performance Tests
(4) Procedure
(a) Resolution bandwidth accuracy
Step Procedure
1 Press the Preset key.
2
Perform all calibration.
3
Set the MS8608A/MS8609A as shown below:
Center Freq ............................................ 100 MHz
Span ............................................................ 1 kHz
RBW (MANUAL) ................................... 300 Hz
Scale .............................................. LOG 1 dB/div
4
Press the
→
RLV key and match the peak of the signal trace to the top line (REF LEVEL) on
the screen.
5 Press the Single key to execute a single sweep,
then check that the single sweep has been
completed.
6
After pressing the Measure key, press the
more key and then select Occ BW Measure.
7
After selecting X dB Down method, set X dB
value to 3 dB.
8 Set the Occupied Bandwidth to on state by
operating menu key.
9
The 3 dB resolution bandwidth value is displayed
in the upper left-hand corner of the screen.
Fill in this value in the table on the next page.
10 Repeat steps 3 to 9 for the frequencies other than
the resolution bandwidth 300 Hz and the fre-
quency span 1 kHz according to the combinations
of resolution bandwidth and frequency span
shown in the table on the next page.
Bandwidth Measurement