R&S FSMR3000, Руководство пользователя

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Common Measurement Settings
R&S
®
FSMR3000
109 User Manual 1179.0116.02 ─ 02
● Input Source Settings ............................................................................................109
● Power Sensors ...................................................................................................... 110
● Power Splitter ........................................................................................................ 119
● Optional External Generator Control .....................................................................120
● Amplitude Settings ................................................................................................ 141
● Frequency ............................................................................................................. 143
7.2.1 Input Source Settings
7.2.1.1 Radio Frequency Input
Access : Overview > Input/Frontend > Input Source > Radio Frequency
RF Input Protection
The RF input connector of the R&S FSMR3 must be protected against signal levels
that exceed the ranges specified in the data sheet. Therefore, the R&S FSMR3 is
equipped with an overload protection mechanism for DC and signal frequencies up to
30
MHz. This mechanism becomes active as soon as the power at the input mixer
exceeds the specified limit. It ensures that the connection between RF input and input
mixer is cut off.
When the overload protection is activated, an error message is displayed in the status
bar ("INPUT OVLD"), and a message box informs you that the RF input was discon-
nected. Furthermore, a status bit (bit 3) in the
STAT:QUES:POW
status register is set.
In this case, you must decrease the level at the RF input connector and then close the
message box. Then measurement is possible again. Reactivating the RF input is also
possible via the remote command
INPut<ip>:ATTenuation:PROTection:RESet
.
Radio Frequency State ............................................................................................... 109
Input Coupling ............................................................................................................. 110
Direct Path ...................................................................................................................110
YIG-Preselector ...........................................................................................................110
Radio Frequency State
Activates input from the "RF Input" connector.
Remote command:
INPut<ip>:SELect
on page 403
Input and Frontend