Sampling rate and decimation
Examples of decimation values and corresponding time scales of a buffer are given in the tables below.
Note
The table lists only a few decimation examples, users can in practice use the following decimations:
SCPI commands:
OS 2.00-30 and higher: [1, 2, 4, 8, 16, 17, 18, …, 65535, 65536] - (powers of 2 up to 16 and then any whole number up to 65536) - ACQ:DEC:Factor
OS 2.00-23 and lower: [1, 2, 4, 8, 16, 64, 256, …, 32768, 65536] - (powers of 2 up to 65536) - ACQ:DEC
API commands:
OS 2.00-23 and higher: [1, 2, 4, 8, 16, 17, 18, …, 65535, 65536] - (powers of 2 up to 16 and then any whole number up to 65536) - rp_AcqSetDecimationFactor
STEMlab 125-14, STEMlab 125-14 4-Input, STEMlab 125-10 (discontinued):
Decimation |
Sampling Rate |
Time scale/length of a buffer |
Trigger delay in samples |
Trigger delay in seconds |
|---|---|---|---|---|
1 |
125 MSa/s |
131.072 µs |
from - 8192 to x |
-6.554e-5 to x |
8 |
15.6 MSa/s |
1.049 ms |
from - 8192 to x |
-5.243e-4 to x |
64 |
1.953 MSa/s |
8.389 ms |
from - 8192 to x |
-4.194e-3 to x |
1024 |
122.07 kSa/s |
134.218 ms |
from - 8192 to x |
-6.711e-2 to x |
8192 |
15.258 kSa/s |
1.074 s |
from - 8192 to x |
-5.369e-1 to x |
65536 |
1.907 kSa/s |
8.590 s |
from - 8192 to x |
-4.295e+0 to x |
SDRlab 122-16:
Decimation |
Sampling Rate |
Time scale/length of a buffer |
Trigger delay in samples |
Trigger delay in seconds |
|---|---|---|---|---|
1 |
122.8 MSa/s |
133.42 µs |
from - 8192 to x |
-6.671e-5 to x |
8 |
15.35 MSa/s |
1.067 ms |
from - 8192 to x |
-5.335e-4 to x |
64 |
1.918 MSa/s |
8.538 ms |
from - 8192 to x |
-4.269e-3 to x |
1024 |
119.92 kSa/s |
136.622 ms |
from - 8192 to x |
-6.831e-2 to x |
8192 |
14.99 kSa/s |
1.092 s |
from - 8192 to x |
-5.460e-1 to x |
65536 |
1.8737 kSa/s |
8.743 s |
from - 8192 to x |
-4.371e+0 to x |
SIGNALlab 250-12:
Decimation |
Sampling Rate |
Time scale/length of a buffer |
Trigger delay in samples |
Trigger delay in seconds |
|---|---|---|---|---|
1 |
250 MSa/s |
65.536 µs |
from - 8192 to x |
-3.227e-5 to x |
8 |
31.250 MSa/s |
0.524 ms |
from - 8192 to x |
-2.621e-4 to x |
64 |
3.906 MSa/s |
4.194 ms |
from - 8192 to x |
-2.097e-3 to x |
1024 |
244.14 kSa/s |
67.108 ms |
from - 8192 to x |
-3.355e-2 to x |
8192 |
30.517 kSa/s |
0.536 s |
from - 8192 to x |
-2.684e-1 to x |
65536 |
3.814 kSa/s |
4.294 s |
from - 8192 to x |
-2.147e+0 to x |