Power Meter Remote Operation 1
N1911A/1912A P-Series Power Meters Programming Guide 75
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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