Stanford Research Systems SR785, Руководство по эксплуатации и программированию

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Status Word Definitions 5-127
SR785 Dynamic Signal Analyzer
Display Status Word
Bit Name Set when
0 NEWA New data is available for DisplayA
1 AVGA DisplayA linear average has completed
2 STLA New settled data is available for DisplayA
3 LIMA DisplayA has failed a limit test
4 SSA Swept Sine sweep has finished
5 WFA Display A 1-shot Waterfall has finished
6 WFD Display A Waterfall has finished drawing
7 unused
8
NEWB New data is available for DisplayB
9 AVGB DisplayB linear average has completed
10 STLB New settled data is available for DisplayB
11 LIMB DisplayB has failed a limit test
12 SSB Swept Sine sweep has finished
13 WFB Display B 1-shot Waterfall has finished
14 WFB Display B Waterfall has finished drawing
15 unused
The Display status bits stay set until read by DSPS?. They are also cleared by the
*CLS command. Use DSPE to set bits in the Display status enable register.
The AVG, STL, LIM and SS bits are only updated when new data is available
for the display (no faster than 8 Hz). Always test for NEWA or NEWB in the
status word along with AVG, STL, LIM or SS.
The status updates for the two displays may not be exactly synchronous. Always
test the DisplayA status bits separately from the DisplayB status bits. For
example, to wait for both displays to finish averaging, do NOT test the Display
status word for both AVGA and AVGB simultaneously. The AVGA and AVGB
bits may not be set at the same time. Test for AVGA and AVGB separately and
wait until both have occurred.