Remote Control
R&S
®
RTM20xx
270
User Manual 1317.4726.02 ─ 01
Table 15-9: Bits in the STATus:QUEStionable:LIMit register
Bit No.
Meaning
0
MEAS1
1
MEAS2
2
MEAS3
3
MEAS4
STATus:QUEStionable:MASK register
This register contains information about the violation of masks. This bit is set if the
assigned mask is violated.
Table 15-10: Bits in the STATus:QUEStionable:MASK register
Bit No.
Meaning
0
MASK1
15.1.6.4
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. Usually this service request initiates an interrupt at the controller, to which the
control program can react appropriately. As evident from
, an SRQ is always
initiated if one or several of bits 2, 3, 4, 5 or 7 of the status byte are set and enabled in
the SRE. Each of these bits combines the information of a further register, the error queue
or the output buffer. The
ENABle
parts of the status registers can be set such that arbitrary
bits in an arbitrary status register initiate an SRQ. In order to make use of the possibilities
of the service request effectively, all bits should be set to "1" in enable registers SRE and
ESE.
The SRQ is the only possibility for the instrument to become active on its own. Each
controller program should cause the instrument to initiate a service request if errors occur.
The program should react appropriately to the service request.
Basics