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HP-IB Programming
Standard STATUS Commands
If the corresponding bits in the ENABle registers are set, changes in
the OPERation EVENt register will change bit 7 of the Status Byte,
changes in the QUEStionable EVENt register will change bit 3 (see
Figure 8-1 on page 108).
What you can do
At both nodes you can:
• Query the CONDition, EVENt, NTRansition, PTRansition, and
ENAble registers,
• Set the NTRansition, PTRansition, and ENAble registers.
The Bits Used by the OLA
The following bits are used in the OPERation node registers:
Bit
Status
8
Channel A is being zeroed
9
Channel B is being zeroed
The following bit is used in the QUEStionable node registers:
Bit
Status
9
Safety bit
The safety bit is set in the CONDition register, when the internal
laser source has been switched off by the built-in power monitoring
circuit.
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