1 Power Meter Remote Operation
52 N1911A/1912A P-Series Power Meters Programming Guide
Enable Register
The enable register specifies the bits in the event register that can
generate a summary bit. The instrument logically ANDs corresponding bits
in the event and enable registers and ORs all the resulting bits to obtain a
summary bit. Enable registers are read- write. Querying an enable register
does not affect it.
An Example Sequence
Figure 1- 8 illustrates the response of a single bit position in a typical
status group for various settings. The changing state of the condition in
question is shown at the bottom of the figure. A small binary table shows
the state of the chosen bit in each status register at the selected times T1
to T5.
Figure 1-8 Typical Status Register Bit Changes
00
01
110
011
0
1
00
0
0
0
0
0
1
11
011
0
1
0
0
0
1
1
0
0
1
0
1
00
01
0
01
0
1
00
0
0
0
0
00
000
000
1
0
0
0
0
0
A
B
C
D
Condition
PTR
NTR
Enable
Condition
Event
Summary Bit
Condition
Event
Summary Bit
Condition
Event
Summary Bit
Condition
Event
Summary Bit
Condition
Event
Summary Bit
1
0
T1 T2 T3
T4
T5
00
0
0
00
***
*
marks when event register is read
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