Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
402
User Manual 1178.8520.02 ─ 08
BW extension
option
Used meas bandwidth
IF
Required conversion loss table format
any
≤
40 MHz
732 MHz
*.ACL
B200/B400
40
MHz to 400
MHz
768 MHz
*.ACL
B600/B1000
>400 MHz
1536 MHz
*.b5g
, if available, otherwise
*.b2g
While the common
.acl
files can be used, data acquisition with larger bandwidths
using such conversion loss tables leads to substantial inaccuracy. Using an average
conversion loss for the entire range (instead of a conversion loss table) during data
acquisition with the large bandwidth extension options causes even more inaccuracy.
In both cases, the
UNCAL
status message indicates that the measurement can have
inaccurate results.
Special conversion loss tables (in
*.b5g
or
*.b2g
files) cannot be edited within the
R&S
FSV/A firmware; they can only be imported and deleted.
B600/B1000-specific conversion loss tables
A B600/B1000 conversion loss table consists of 43 magnitude correction values (as
opposed to 1 for
.acl
files). To each side of the specific frequency, 21 reference val-
ues are defined with an offset of 25
MHz to 1025
MHz. Thus, correction levels are
measured with a spacing of 50
MHz.
Example:
For example, for the level measured at the frequency 50
GHz, 43 correction levels are
defined:
●
21 for the frequencies 48.075
GHz, 49.125
GHz, 49.175
GHz, ..., 49.975
GHz
●
1 for the frequency 50
GHz
●
21 for the frequencies 50.025
GHz, 50.075
GHz, 50.125
GHz, ..., 51.025
GHz
B600/B1000-specific conversion loss tables are provided in files according to the fol-
lowing syntax:
<serial_no.>_MAG_<harmonic>_B2000.b2g
If the IF on the instrument differs to the IF of the correction data (specified in the con-
version loss table file), the instrument automatically converts the correction data
accordingly.
Phase correction tables
In addition to the magnitude correction tables, B600/B1000 phase correction tables
with the same layout are defined in a separate file. Both files are always delivered as a
pair by the manufacturer of the external mixer. Currently, the R&S
FSV/A uses only the
magnitude correction files for external mixers; the phase is assumed to be ideal (cor-
rection values are all 0).
Data input and output
