Ronde & Schwarz 1304.0004K03, Руководство пользователя

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
278 User Manual 1178.3370.02 ─ 11
Select 75
Ω
if the 50
Ω
input impedance is transformed to a higher impedance using a
75
Ω
adapter of the RAZ type. (That corresponds to 25
Ω
in series to the input impe-
dance of the instrument.) The correction value in this case is 1.76 dB = 10 log (75
Ω
/
50
Ω
).
This value also affects the unit conversion (see "Reference Level" on page 313).
Remote command:
INPut<ip>:IMPedance
on page 780
YIG-Preselector
Enables or disables the YIG-preselector, if available on the R&S FPL1000.
An internal YIG-preselector at the input of the R&S FPL1000 ensures that image fre-
quencies are rejected. However, image rejection is only possible for a restricted band-
width. To use the maximum bandwidth for signal analysis you can disable the YIG-pre-
selector at the input of the R&S
FPL1000, which can lead to image-frequency display.
Note: Note that the YIG-preselector is active only on frequencies greater than 6 GHz
(for models R&S FPL1014 and R&S FPL1026). Therefore, switching the YIG-preselec-
tor on or off has no effect if the frequency is below that value.
Note:
For the following measurements, the YIG-Preselector is off by default (if available).
●
I/Q Analyzer
●
VSA
Remote command:
INPut<ip>:FILTer:YIG[:STATe]
on page 779
SAW filter
The R&S FPL1000 hardware contains both a wide and a narrow IF path. Depending on
the used analysis bandwidth, the R&S FPL1000 determines which IF path to use auto-
matically. The wide IF path allows for a smoother signal at the center frequency, while
the narrow IF path supresses possibly distorting signals further away from the center
frequency. Using this setting, you can affect which IF path is used.
"Auto" The R&S FPL1000 determines which IF path to use automatically,
depending on the used analysis bandwidth.
"Off" The wide IF path is always used.
Remote command:
INPut<ip>:FILTer:SAW
on page 779
6.3.2 Power Sensors
The R&S FPL1000 can also analyze data from a connected power sensor.
The "Sensor" connector is provided by the "Additional Interfaces" option R&S FPL1-
B5. Additionally, the power sensor measurement requires the option R&S FPL1-K9.
Receiving Data Input and Providing Data Output