Table of Contents
Advertisement
Appendix A
The BlazeX output is always an RC filter (1 to 4 poles) regardless of the front panel
Advanced Filter setting. This is because the BlazeX output is intended for feedback
applications that require low latency.
Summary of Filter Characteristics
The chart below summarizes the speed of the different filters. (also see Step Response
graphs on the following pages).
Stages
The chart below summarizes the noise bandwidth of the different filters. Note that for a
single stage, all 3 filters are designed with the same noise bandwidth.
Stages
Time to settle to within 1% of final value (in time constants)
RC
1
4.6
2
6.6
3
8.4
4
10.0
Equivalent Noise Bandwidth (fraction of f
RC
1
1.6
2
0.79
3
0.59
4
0.5
Advanced Filters
Gaussian
Linear Phase
2.3
4.0
5.6
7.1
=(2π×time constant)
c
Gaussian
Linear Phase
1.6
1.1
0.94
0.81
SR865A DSP Lock-in Amplifier
157
4.6
4.4
4.8
5.4
−1
)
1.6
0.93
0.83
0.78
Advertisement
Table of Contents
