18
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.
CF Step
Set the CF step. User can modify the center frequency by fixed step continuously
switches the channel to be measured.
Key points:
Setting for CF step could be “Manual” or “Auto”. In “Auto” mode, CF step is 1/10 of
span for non-
zero span, and equals the RBW for zero span. In “Manual” mode, user
can input data by numeric keys.
After setting of appropriate CF step and center frequency, user can switch the
measured channel with specified step by Up/Down keys in order to sweep the
adjacent channels manually.
You can modify this parameters by numeric keys, knob, or arrow keys.
Table 2-4 CF Step
Parameter
Description
Default
0 GHz
Range
0 Hz ~ 1.5GHz (P4130)
0 Hz ~ 2.2GHz (P4135)
0 Hz ~ 3.0GHz (P4140)
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) ; 2.2 GHz (P4135); 3.0 GHz (P4140)
Range
*
0Hz ~ 1.5GHz (P4130); 0Hz ~ 2.2GHz (P4135)
0Hz ~ 3.0GHz (P4140)
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
