Rohde & Schwarz R&S FSP Series, Руководство по эксплуатации

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Operating Manual 1164.4556.12 - 06 4.269
R&S FSP Instrument Functions
LO/IF ports for external mixers - Option R&S FSP-B21
Within the band USER this field is not editable.
Remote command:
MIX:HARM:TYPE EODD
PORTS - Type of mixer
Defines if a two- or three-port mixer is used.
Remote command:
MIX:PORT 3
BIAS - Bias current
The bias current can range from -10 mA to 10 mA.
The current corresponds to the short-circuit current. The actual bias current is lower
because of the forward voltage of the mixer diode(s).
If CONV LOSS TABLE is activated, changes of the bias current are temporary only,
i.e. the bias current will not be changed within the file selected in CONV LOSS
TABLE . To store the changes press ACCEPT BIAS softkey. (See section “Bias Cur-
rent” on page 4.270 .)
Remote command:
MIX:BIAS 7mA
AVG CONV LOSS - Average of conversion loss of the external mixer
Remote command:
MIX:LOSS -12DB
CONV LOSS TABLE - Conversion loss depending on frequency
Alternatively to the average value stated under AVG CONV LOSS, conversion loss
can be taken into account as a function of frequency. The CONV LOSS TABLE field
gives the name (without extension) of a binary file stored on the hard disk. The file
contains the following data of the associated mixer:
– type designation of mixer
– serial No. of mixer
– waveguide band
– frequency range
– order of harmonic
– number of ports (2 / 3)
– bias current
– conversion loss as a function of frequency
Within an edit box the tables suited for the band can be selected. Only those tables
are allowed that cover the whole frequency range and correspond to the harmonic
used.
PORTS
2
3