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Press the [AMPLITUDE] [ 2 ] [MHz] key.
[Caution]
Compare the following 2 screen shots. These are measured with different reference
levels.
On the above screen, the reference level has been set to -30 dBm. In this situation,
the internal amplifier of the SDU5600 is saturated, causing the display of noise
that does not actually exist.
On the above screen, the reference level has been set to -20 dBm. As you can see,
a clearer display is observed.
Therefore, it is very important to select the proper reference level in accord with the
signals.
Beside the above mentioned reference level, using a RF attenuator on the receiver and
the AGC (Automatic Gain Control) setting will affect the measurements.
Also, if the incoming signal is too strong, overloading the receiver, the noise floor on the
screen may shift.
[Improper setting]
22
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