Datasheet

Basic Settings
3.1. FREQ
Set the frequency parameter of analyzer. The analyzer sweeps within a specified range, and the
sweep will start once you change this parameter.
The frequency range of current channel can be expressed by either of two groups of
paramenters: Start Frequency/Stop Frequency （ f
start
/f
stop
） , or center Frequency/Span
（ f
center
/f
span
） . If any one of them is adjusted, other three parameters will be changed
accordingly to ensure their coupling relationship.
f
center
=（f
start
-f
stop
）/2
f
span
= f
stop
- f
start
3.2. Center Frequency
Enable the center frequency function, to allow a frequency displays in center be selected. When
pressed, the frequency mode is switched to Center Frequency/Span for input. In this mode,
parameters you specified are always shown at the lower right and left side of the display grid.
Key points:
 The start and stop frequencies vary with the center frequency when span is constant.
 Changing the center frequency horizontally shifts the current sweep channel and the
adjustment is limited by the specified range in datasheet.
 In the Zero Span mode, start frequency, stop frequency and center frequency are always
equal.
 User can modify this parameter by numeric keys, knob and arrow keys.
Table 2-1 Center Frequency
Parameter
Description
Default
0.75GHz (P4130-1)
1.1GHz (P4135-1)
1.5GHz (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
-12-