Rohde & Schwarz ESW Series - Page 391

Network and Remote Operation
R&S
®
ESW
391User Manual 1177.6298.02 ─ 08
Bit No. Meaning
5 Range 6
This bit is set if subrange 6 has been reached.
6 Range 7
This bit is set if subrange 7 has been reached.
7 Range 8
This bit is set if subrange 8 has been reached.
8 Range 9
This bit is set if subrange 9 has been reached.
9 Range 10
This bit is set if subrange 10 has been reached.
10 RF Input 1
This bit is set if the transducer has been assigned to RF input 1.
11 RF Input 2
This bit is set if the transducer has been assigned to RF input 2.
12 to 13 Unused
14 Subrange limit
This bit is set when the transducer is at the point of changeover from one subrange to another.
15 This bit is always 0.
14.1.7.4 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. 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-
troller, to which the control program can react appropriately. As evident from Fig-
ure 14-2, 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
Remote Control Basics