Measuring the occupied bandwidth
R&S FSH
1145.5973.12 4.50
E-14
Changing the span
The span set by the R&S FSH normally yields optimum measurement results. In some cases, however,
a larger span needs to be selected. This is the case, for example, when the area outside the span that
is automatically set contains signal components that need to be included in the measurement.
Operation:
Press the SPAN key.
The AUTO SPAN softkey label is highlighted in green
to indicate that the optimum span for measuring the
occupied bandwidth is set. MANUAL SPAN entry is
active for immediate entry of another span.
Using the numeric keys, enter a new span and
terminate the entry with the appropriate unit, or
Change the span with the rotary knob or the cursor
keys and terminate the entry with the ENTER key
or the MANUAL SPAN softkey.
The largest permissible span for measuring the occupied bandwidth is ten times the channel bandwidth.
At larger spans, the result of the channel power measurement would be increasingly imprecise,
because too few points of the trace occur in the channel to be measured.
Press the AUTO SPAN softkey to again set the optimum span.
To return to the menu for measuring the occupied bandwidth, press the MEAS key.
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com
