Srq on external status bit 1 (sb1) selection – Measurement Computing Digital HS User Manual
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2.2.2.2.7 S2-7 and S2-8 SRQ EN SB1 and SRQ EN SB2: Service
Request
on External Status Bit 1 and 2
The input port has two status line inputs that allow the external device to request
service to the IEEE 488 bus via the Digital488HS/32. Each of these status line inputs
is capable of generating an SRQ on the bus when this feature is enabled. When
enabled, a service request is generated on the rising edge of the SB signal lines. This
active polarity is not switch selectable. Each status bit can be polled by the IEEE 488
bus controller via serial polls. The level of the signal is latched at the beginning of the
serial poll process. Default is SRQ disabled.
OPEN
S2
SRQ EN SB1
8
7
6
5
4
3
2
1
OPEN
8
7
6
5
4
3
2
1
S2
SRQ on SB1 Disabled
(default)
SRQ on SB1 Enabled
SRQ EN SB1
SRQ On External Status Bit 1 (SB1) Selection
OPEN
S2
SRQ EN SB2
8
7
6
5
4
3
2
1
OPEN
8
7
6
5
4
3
2
1
S2
SRQ on SB2 Disabled
(default)
SRQ on SB2 Enabled
SRQ EN SB2