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Measuring the occupied bandwidth
R&S FSH
1145.5973.12 4.48
E-14
Press the LEVEL ADJUST softkey.
The R&S FSH starts the measurement of the optimal
reference level using a resolution bandwidth of 1 MHz,
a video bandwidth of 1 MHz and the peak detector.
While the measurement is in progress, the R&S FSH
outputs the message “Adjusting level for OBW
measurement, please wait... ".
The optimal reference level is then set.
Setting the channel bandwidth
The channel bandwidth determines the span, resolution bandwidth and sweep time the R&S FSH uses
for measuring the occupied bandwidth.
Press the CHAN BW softkey.
An entry box showing the current channel bandwidth
setting opens.
Using the numeric keys, enter a new channel
bandwidth and terminate the entry with the
appropriate unit; or
Change the channel bandwidth with the rotary
knob or the cursor keys and terminate the entry
with the ENTER key or the CHANNEL BW softkey.
The R&S FSH automatically adapts the span to the
channel bandwidth that has been entered (span = 5 x
channel bandwidth) to ensure that no incorrect
measurements of occupied bandwidth are made. The
minimum channel bandwidth that can be set is 2 kHz.
If you attempt to enter a smaller channel bandwidth,
the R&S FSH will automatically set 2 kHz and output
the message "Limit exceeded".
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com