Stanford Research Systems SR865A Operation Manual page 131

Chapter 4
OFLT(?) { i }
The OFLT i
i
0
1
2
3
4
5
6
7
Example
OFLT 10
OFLT?
OFSL(?) { i }
The OFSL i
(i=2) or 24 dB/oct (i=3).
Example
OFSL 1
OFSL?
SYNC(?) { OFF | ON | i }
The SYNC i
Example
SYNC ON
SYNC 1
SYNC?
ADVFILT(?) { OFF | ON | i }
The ADVFILT i
Example
ADVFILT ON
ADVFILT 1
ADVFILT?
ENBW?
The
ENBW?
Note that the effect of the
Example
ENBW?
command sets the time constant according to the table below.
time constant i
1 μs
8
3 μs
9
10 μs 10 100 ms
30 μs
11 300 ms
100 μs
12 1 s
300 μs 13 3 s
1 ms 14 10 s
3 ms 15 30 s
Set the time constant to 100 ms
Returns the time constant i
command sets the filter slope to 6 dB/oct (i=0), 12 dB/oct (i=1), 18 dB/oct
Set the filter slope to 12 dB/oct
Returns the filter slope i
command turns the synchronous filter off (i=0) or on (i=1).
Set the synchronous filter to on
Returns the state of the synchronous filter i
command turns the advanced filter off (i=0) or on (i=1).
Set the advanced filter to on
Returns the state of the advanced filter i
query returns the equivalent noise bandwidth of the output filter, in hertz.
SYNC
Returns the equivalent noise bandwidth, in hertz.
time constant i
10 ms 16 100 s
30 ms 17 300 s
18 1 ks
19 3 ks
20 10 ks
21 30 ks
filter is neglected by ENBW?
Programming
time constant
SR865A DSP Lock-in Amplifier
113