Datasheet

3.3. Start Freq
Set the start frequency of current channel, displays at the left scale. When pressed, the
frequency mode is switched to Start Frequency/Stop Frequency for input. In this mode,
parameters you specified are always shown at the lower left and right side of the grid.
Key points:
 The span and center frequency are changed automatically according to the start frequency.
The change of the span would have influence on other system parameters. For more
details, please refer to “Span”.
 In Zero Span mode, the start frequency, stop frequency and center frequency are always
equal.
 You can modify this parameter using the numeric keys, knob, or arrow keys.
Table 2-2 Start Frequency
3.4. Stop Freq
Set the stop frequency of current channel, displays at the right scale. When pressed, the frequency
mode is switched to Start Frequency/Stop Frequency for input. In this mode, parameters you
specified are always shown at the lower left and right side of the grid.
Key points:
 The span and center frequency are changed automatically according to the stop frequency. The
change of the span would have influence on other system parameters. For more details, please
refer to “Span”.
 You can modify this parameter using the numeric keys, knob, or direction keys.
Table 2-3 Stop Frequency
*Note：The range is from 100 Hz to 3.0GHz in non-zero span.
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Parameter
Description
Default
0 GHz
Range
0 Hz ~ 1.5GHz (P4130-1)
0 Hz ~ 2.2GHz (P4135-1)
0 Hz ~ 3.0GHz (P4140-1)
Unit
GHz, MHz, kHz, Hz
Knob Step
Span>0, step=span/200
Span=0, step=RBW/100, Min=1 Hz
Arrow Keys Step
CF step
Parameter
Description
Default
1.5 GHz (P4130-1)
2.2 GHz (P4135-1)
3.0 GHz (P4140-1)
Range*
0Hz ~ 1.5GHz (P4130-1)
0Hz ~ 2.2GHz (P4135-1)
0Hz ~ 3.0GHz (P4140-1)
Unit
GHz, MHz, kHz, Hz
Knob Step
Span>0, step=span/200
Span=0, step=RBW/100, Min=1 Hz
Arrow Keys Step
CF step