Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
401
User Manual 1178.8520.02 ─ 08
external mixers from Rohde
&
Schwarz provide multiple conversion loss table files.
When you select a storage path containing cvl files, or a particular cvl file from a
Rohde
&
Schwarz mixer for import, all available files are copied to the
C:\R_S\INSTR\USER\cvl\
directory on the R&S
FSV/A. Provided
.acl
files are
renamed according to the following syntax:
<serial_number>_<harmonic_order>_<IF>.acl
,
e.g.
12345_2_1330M.acl
To select a conversion loss table for use in a measurement, you merely have to select
the serial number for the external mixer in use. The R&S
FSV/A automatically selects
the correct cvl file for the current IF. As an alternative, you can also select a user-
defined conversion loss table (
.acl
file).
Before copying any files to the
C:\R_S\INSTR\USER\cvl\
directory, the R&S
FSV/A
firmware moves any existing user-defined cvl tables to a
backup
subdirectory. To use
a user-defined cvl table later, select the file in the
C:\R_S\INSTR\USER\cvl\backup
directory.
A validation check is then performed on the selected table to ensure that it complies
with the settings. In particular, the following is checked:
●
The assigned band name
●
The harmonic order
●
The mixer type
●
The table must contain at least one frequency that lies within the frequency range
for the band
Reference level
The maximum possible reference level depends on the maximum used conversion loss
value. Thus, the reference level can be adjusted for each range according to the used
conversion loss table or average conversion loss value. If a conversion loss value is
used which exceeds the maximum reference level, the reference level is adjusted to
the maximum value permitted by the firmware.
External mixers and large bandwidth extension options
If the bandwidth extension options R&S
FSV3-B600/-B1000 are active, external mixers
with a bandwidth up to 1
GHz are supported. For information on which mixers are sup-
ported for these bandwidth options, see the R&S
FSV/A data sheet. Two-port mixers
are not supported.
Depending on the installed and active bandwidth extension options, the used measure-
ment bandwidth and IF, special conversion loss tables are required.
Data input and output
