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5
Chapter 5 Remote Interface Reference
3488 Mode Commands
STATUS
Reads the 3499A/B/C's Status Byte and returns a decimal value that is
the sum of the values of the individual bits that are set (condition is
true).
Bit
Weighted Value
0
1
2
3
4
5
6
7
Bits 0, 2, and 3 will be cleared after the STATUS command is executed.
Bit 1 will be cleared only after the data is read from the 3499A/B/C, new
data is requested, or the 3499A/B/C is reset. The Ready for Instructions
bit (Bit 4) will be cleared whenever the 3499A/B/C is busy executing
instructions. For this reason, Bit 4 will always be clear when STATUS is
executed. The Error bit (Bit 5) will only be cleared after the Error
Register is read. Bit 6, RQS, will only be cleared after STATUS, if the
condition that caused Bit 6 to be set is cleared.
OUTPUT 709; "STATUS"
ENTER 709; A
DISP A
130
Definition
1
End of scan sequence
2
Output available
4
Power-on SRQ asserted
8
Front panel SRQ key pressed
16
Ready for instructions
32
Error
64
RQS
128
Not used
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