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R&S FS300
6.2.3.4.2
Measuring the Filter or Signal Bandwidth
Use
Selecting the
signal spectrum
Measuring the
signal bandwidth
Operating manual, 4/2004
If you want to measure the bandwidth of a certain signal spectrum shown in
the measurement diagram, you can do this with the N dB DOWN function.
Two lines one of which is n dB down on the active reference marker are dis-
played on the screen [13]. The difference between the measured frequencies
is displayed on the screen as the bandwidth.
N dB
1.
Position marker 1 on the trace maximum which is to form the reference
for the bandwidth measurement (Ê 6-88).
2.
Press the
An entry field containing the current attenuation setting of N dB is dis-
played. The default setting is 3 dB.
3.
Enter a new value (Ê 5-51).
The entry range for the attenuation N is:
0 ≤ ≤ ≤ ≤ down ≤ ≤ ≤ ≤ 100 dB
4.
Press the ENTER key [5] to close the entry field.
The new setting is saved and the temporary markers T1 and T2 which
are positioned to the right and left of marker 1 on the trace are activated.
The levels at markers T1 and T2 are N dB less than the level at marker 1.
The frequency difference between the markers T1 and T2 (N dB band-
width) is displayed in the parameter field instead of the M2 marker values.
N dB bandwidth
function key in the
6-101
Spectrum Analyzer
submenu.
E-1007.9900.14
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