
Chapter 4 Command Reference
Common Commands
Programming Guide
4-57
4
*STB?
(Status Byte Query)
COMMAND
*STB?
Queries the Status Byte Register, shown in Figure 4-6.
This register is cleared at power-on.
This query does not directly alter the Status Byte Register (including the
MSS/RQS bit) or anything related to the generation of SRQ.
Figure 4-6. The Status Byte Register
See the section titled “Status Byte Register and Service Request Enable
Register” starting on page 3-27 for a detailed description of the Status
Byte Register.
QUERY RESPONSE
•
Numeric data transferred as ASCII bytes in <NR1> format.
•
Range is 0 to 255.
•
The response value when rounded to an integer value and expressed
in base 2 (binary), represents the bit values of the Status Byte
Register.
•
The value of unused bits is zero when queried.
•
The Master Summary Status, not the RQS message, is reported on
bit 6. Master Summary Status indicates that the Counter has at least
one reason for requesting service. (The Master Summary Status is not
sent in response to a serial poll; the IEEE 488.1 RQS message is sent
instead.) It is the inclusive OR of the bitwise combination (excluding
bit 6) of the Status Byte Register and the Service Request Enable
Register.
3
(16)
4
(32)
5
(64)
6
(128)
7
(8)
EAV
2
MAV
ESB
RQS/MSS
OSB
QSB
Not
Used
0 to 1
Bits
Содержание 53150A Series
Страница 1: ... Programming Guide HP 53150A 151A 152A Microwave Frequency Counter ...
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Страница 10: ...Contents x Programming Guide ...
Страница 11: ...1 Before You Start ...
Страница 20: ...Chapter 1 Before You Start Related Documentation 1 10 Programming Guide 1 ...
Страница 21: ...2 Command Summary A Quick Reference ...
Страница 41: ...3 Programming Your Counter for Remote Operation ...
Страница 100: ...Chapter 3 Programming Your Counter for Remote Operation Programming Examples 3 60 Programming Guide 3 ...
Страница 101: ...4 Command Reference A Dictionary ...
Страница 162: ...Chapter 4 Command Reference Common Commands 4 62 Programming Guide 4 ...
Страница 163: ...5 Errors ...
Страница 174: ...Chapter 5 Errors Error Types 5 12 Programming Guide 5 ...
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Страница 186: ... Manual Part Number 53150 90002 Printed in U S A NOVEMBER 1997 ...