Common Instrument Functions
R&S
®
FPL1000
195
User Manual 1178.3370.02 ─ 03
Bit No.
Meaning
3
Input Overload
This bit is set if the signal level at the RF input connector exceeds the maximum.
The RF input is disconnected from the input mixer to protect the device. In order to re-enable
measurement, decrease the level at the RF input connector and reconnect the RF input to the
mixer input.
For details on the protection mechanism see
The R&S
FPL1000 displays the keyword "INPUT OVLD".
4 to 14
Unused
15
This bit is always 0.
STATus:QUEStionable:TIMe Register
The
STATus:QUEStionable:TIMe
register contains information about possible time
errors that may occur during operation of the R&S
FPL. A separate time register exists
for each active channel.
You can read out the register with
STATus:QUEStionable:TIME:CONDition?
STATus:QUEStionable:TIME[:EVENt]?
Table 6-19: Meaning of the bits used in the STATus:QUEStionable:TIMe register
Bit No.
Meaning
0
not used
1
Sweep time too low
This bit is set if the sweep time is too low.
2 to 14
Unused
15
This bit is always 0.
Application of the Status Reporting System
The purpose of the status reporting system is to monitor the status of one or several
devices in a measuring system. To do this and react appropriately, the controller must
receive and evaluate the information of all devices. The following standard methods
are used:
●
Service request
(SRQ) initiated by the instrument
●
Serial poll
of all devices in the bus system, initiated by the controller in order to
find out who sent a SRQ and why
●
Parallel poll
of all devices
●
Query of a
specific instrument status
by means of commands
●
Query of the
error queue
Service Request
Under certain circumstances, the instrument can send a service request (SRQ) to the
controller. A service request is a request from an instrument for information, advice or
treatment by the controller. Usually this service request initiates an interrupt at the con-
Network and Remote Operation
