Anritsu MS8608A, Руководство по эксплуатации, Страница: 240 / 338

SECTION 4 STATUS STRUCTURE
4-8
Service Request (SRQ) Enabling Operation
Bits 0 to 7 of the Service Request Enable Register (SRE) determine which bit of the
corresponding STB register can generate SRQ.
The bits in the Service Request Enable Register correspond to the bits in the Status
Byte Register. If a bit in the Status Byte Register corresponding to an enabled bit in the
Service Request Enable Register is set to 1, the device makes a service request to the
controller with the RQS bit set to 1.
7
5
4
3
2
1
0
7
6
5
4
3
2
1
0
&
&
&
&
&
&
&
Logical O R
Service Request
Generation
MSS 6 RQS
Service request enable (SRE) register
Status summary message
Status byte (STB) register
Not used
ESB
MAV
Not used
ESB(END)
Not used
disabled = 0, enabled = 128(2 7 )
Not used
disabled = 0, enabled = 32 (2 5 )
disabled = 0, enabled = 16 (2
4
)
disabled = 0, enabled = 8 (2 3 )
disabled = 0, enabled = 4 (2
2
)
disabled = 0, enabled = 2 (2 1 )
disabled = 0, enabled = 1 (2
0
)
(1) Reading the SRE register
The contents of the SRE register are read using the
∗
SRE? common query. The response
message to this query is an integer from 0 to 255 which is the sum of the bit digit
weighted values in the SRE register.
(2) Updating the SRE register
The SRE register is written using the
∗
SRE common command. An integer from 0 to
255 is assigned as a parameter to set the SRE register bit to 0 or 1. The value of bit 6 is
ignored.