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20 SSA3000X Plus User Manual
Table 2-4 Freq Offset
Parameter
Explanation
Default
0 Hz
Range
-100GHz ~ 100GHz
Unit
GHz, MHz, kHz, Hz
Knob Step
Span > 0, Step = Span/200, min 1 Hz
Span = 0, Step = RBW/100, min 1 Hz
Direction Key Step
Freq Step
Related to
Center Freq, Start Freq, Stop Freq
2.1.1.5
Freq Step
Setting the value of Freq Step will change the direction key step of center frequency, start frequency,
stop frequency and frequency offset.
At a fixed step change the value of the center frequency can reach the purpose of switching
measurement channels rapidly and continuously.
There are two kinds of frequency step modes
：
Auto
and
Manual
. In Auto mode, the Freq step is
1/10 of the span in Non-zero span or equals the RBW while in Zero Span. In Manual mode, you
can set the step using the numeric keys.
Table 2-5 Freq Step
Parameter
Explanation
Default
Full Span/10
Range
1Hz ~ Full Span
Unit
GHz, MHz, kHz, Hz
Knob Step
Span > 0, Step = Span/200, min 1 Hz
Span = 0, Step = RBW/100, min 1 Hz
Direction Key Step
In 1-2-5 sequence
Related to
RBW, Span and related parameters
2.1.1.6
Signal Track
Turn on or off the signal tracking function. It is used to track the signal whose frequency is unstable and
the instantaneous change of the amplitude is less than 3 dB. By marking cursor 1 on the measured
signal, the change of the measured signal can be tracked and measured all the time.
The signal tracking process is shown in the following figure:
