Measurement Setup Parameters
Channels: From the menu Input > Channels, available options are:
1 channel through
n
channels (
n
depends on your digitizer model),
I+jQ (IN1+jIN2)
Dual I+jQ (IN1+jIN2, IN3+jIN4)
The custom channel configuration can be used to specify a non-standard mapping
between the digitizer input and the VSA logical channel. The default mapping of the
logicals channel to the digitizer inputs is:
Logical Channel
Digitizer Input
1
IN1
2
IN3
3
IN2
4
IN4
From the menu Input > Analog the following parameters can be set:
Range: Thedigitizer offers several full scale range. Please refer to
product datasheet for details.
Coupling: DC
Input Impedance: 50 Ohms.
Connection: Single Ended.
The frequency measurement parameters can be configured from the MeasSetup >
Frequency menu.
Frequency: The default setup is shown below as example.
Model Option
Band
Center
Span
Start
Stop
-SR4 -F25
0 to 1.953 GHz
976.5 MHz
1.953 MHz
0
1.953 MHz
Span: The maximum span is dependent upon both the sampling rate and
the analog bandwith of the particular digitizer model.
Model Option
Maximum Span (Analysis Bandwidth)
-SR4 -F25
1.953 GHz (2.5 GHz in interleaved mode)
The maximum span is obtained with following formula:
Maximum Span = Min( Sample Rate / 2.56 ; Analog Bandwidth)
14
M9710A Hardware Extension of 89600 VSA Software
