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4.User Notice
27
Figure 4-9 Set frequency span
4) Activate Marker
—Press【Marker】button in the function area. Press the softkey
to select [Marker 1 2 3 4 5 ], select Marker 1, the marker is
located at horizontal center by default, that is the signal peak
point or its neighbor.
—Press Peak, and enter the next level menu, select [Max
Search]. Frequency and amplitude values are read by the
marker and shown on the top right of the display area.
5) Setting amplitude
The reference level will be shown at the top of the display grid. To
get a better dynamic range, the real signal peak point should be
located at or near the top of display grid (reference level). The
reference level is also the maximum value on Y axis. Here we
reduce to 10dB reference level to increase the dynamic range.
Press 【AMPTD】, the amplitude setting menu will pop up, and the
[reference level] soft key will be activated. The reference level can
be input at the top left of the display grid. Input "-10" using the
numeric keypad and set the unit to dBm. You can also use the 【↓】
key or the knob for adjustment.
The reference level is set at -10dBM, which is the signal peak
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