Models 707B and 708B Switching Matrix Reference Manual
Section 7: TSP command reference
707B-901-01 Rev. B / January 2015
7-173
B7
B6
B5
B4
B3
B2
B1
B0
**
>
>
>
>
>
>
*
1
0
0
0
0
0
0
1
* Least significant bit
** Most significant bit
The returned value can indicate one or more status events occurred. When an enabled status event
occurs, a summary bit is set in this register to indicate the event occurrence.
The individual bits of this register have the following meanings:
Bit
Value
Description
B0
status.MEASUREMENT_SUMMARY_BIT
status.MSB
Set summary bit indicates that an enabled measurement
event has occurred.
Bit B0 decimal value: 1
B1
status.SYSTEM_SUMMARY_BIT
status.SSB
Set summary bit indicates that an enabled system event
has occurred.
Bit B1 decimal value: 2
B2
status.ERROR_AVAILABLE
status.EAV
Set summary bit indicates that an error or status
message is present in the Error Queue.
Bit B2 decimal value: 4
B3
status.QUESTIONABLE_SUMMARY_BIT
status.QSB
Set summary bit indicates that an enabled questionable
event has occurred.
Bit B3 decimal value: 8
B4
status.MESSAGE_AVAILABLE
status.MAV
Set summary bit indicates that a response message is
present in the Output Queue.
Bit B4 decimal value: 16
B5
status.EVENT_SUMMARY_BIT
status.ESB
Set summary bit indicates that an enabled standard
event has occurred.
Bit B5 decimal value: 32
B6
status.RQS
status.MASTER_SUMMARY_STATUS
status.MSS
Request Service (RQS)/Master Summary Status (MSS).
Depending on how it is used, bit B6 of the status byte
register is either the Request for Service (RQS) bit or
the Master Summary Status (MSS) bit:
•
When using the GPIB, USB, or VXI-11 serial poll
sequence of the Models 707B and 708B to obtain
the status byte (serial poll byte), B6 is the RQS
bit. The set bit indicates that the Request Service
(RQS) bit of the status byte (serial poll byte) is
set and a serial poll (SRQ) has occurred.
•
When using the
status.condition
register
command or the *STB? common command to
read the status byte, B6 is the MSS bit. Set bit
indicates that an enabled summary bit of the
status byte register is set.
Bit B6 decimal value: 64
B7
status.OPERATION_SUMMARY_BIT
status.OSB
Set summary bit indicates that an enabled operation
event has occurred.
Bit B7 decimal value: 128
In addition to the above constants, when more than one bit of the register is set,
statusByte
equals the sum of their decimal weights. For example, if 129 is returned, bits B0 and B7 are set (1 +
128).