Common Measurement Settings
R&S
®
FSW
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User Manual 1173.9411.02 ─ 43
To define a new conversion loss table
1. Select "INPUT > Input Source Config > External Mixer > Conversion Loss Table".
2. Select "New Table".
3. Define a file name and, optionally, a comment for the new table.
4. Define the band and mixer settings for which the conversion loss table is to be
used. These settings will be compared to the current mixer settings during the vali-
dation check when the table is imported.
5. Define the reference values for the frequency-dependant conversion loss:
a) Select "Insert Value" to add a new row in the table.
b) Enter the first reference frequency.
c) Enter the corresponding conversion loss value.
The conversion loss function is updated and displayed in the preview diagram
in the dialog box.
d) Repeat these steps to define up to 50 reference values.
6. Select "Save".
The table is stored and is then available for import and assignment to a specific fre-
quency range.
To shift the conversion loss values
In order to increase each reference value in the conversion-loss table a constant value
(a
0
), the values can be shifted either in x-directoin or in y-direction.
1. Select "INPUT > Input Source Config > External Mixer > Conversion Loss Table".
2. Select the assigned conversion loss table.
3. Select "Edit Table".
4. Select "Shift y" and enter the constant value
<a
0
>
to shift all y-values in the table by
this value.
Or:
Select "Shift x" and enter the constant value
<a
0
>
to shift all x-values in the table by
this value.
5. Select "Save".
8.2.5.4
Measurement Examples: Using an External Mixer
Measurement Example 1: Two-Port Mixer
The following example demonstrates the basic operation of an external two-port mixer
as well as the required settings. A sine wave signal with f = 14.5
GHz is applied to the
input of a multiplier. The spectrum at the multiplier output is to be recorded in the range
of 52
GHz to 60
GHz using a 2-port mixer for the V band. The mixer used is a double-
diode mixer. The example of operation is described in the following steps:
Data Input and Output
