JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
Using Interference Analyzer
97
See
“Appendix C – Band, frequency & channel standard” on page 571 for more information.
b. Select the band to be measured by using the rotary knob, the arrow keys, or the Page
Up/Page Down soft keys.
c. Press the Select soft key or the rotary knob to confirm the selection.
4.
Toggle the Link soft key to select the sweep direction and select Fwd for forward or Rev for
reverse.
5.
To set the channel number, complete the following steps:
a. Press the Channel Number soft key.
b. Enter a value by using the numeric keys.
c. Press the Enter soft key or ENTER hard key to complete the entry.
The instrument automatically displays the corresponding center frequency value for the
selected channel number.
6.
To set the span, complete the following steps:
a. Press the Span soft key.
b. Select the span option, from the following choices:
–
To set the span manually, select Span , enter a value, and then select the unit.
–
To set the span automatically, select Full Span , Zero Span , or Last Span as needed.
NOTE
The Zero Span option is available only in the Spectrum mode. If you have selected Zero
Span , select TRIGGER > Free Run , External , GPS , Video , or Display Position .
Optional . To define the amount of frequency increment for the rotary knob:
1.
Press the Frequency Step soft key, if the Freq is selected.
2.
Enter a value by using the numeric keys.
3.
Press the unit: GHz , MHz , kHz , or Hz .
Optional . To define the amount of channel increment for the rotary knob:
1.
Press the Channel Step soft key, if the Channel is selected.
2.
Enter a value by using the numeric keys.
3.
Press the Enter soft key.
Setting amplitude
Reference level and attenuation
You can set the reference and attenuation levels automatically or manually to optimize the display of
the traces measured, as you desire.
Procedure
To automatically set the reference and attenuation level:
1.
Press the AMP/SCALE hard key.
2.
Press the Auto Scale soft key.
Each time you press this key, both of the Y-axis scale and input attenuation level change to be
optimized with some margin.
To set the reference or attenuation level manually:
1.
Press the AMP/SCALE hard key.