DS-2000 Frequently Asked Questions
Question number FAQ-0689
What is the maximum storage time for the DS-0250 throughput?
The maximum file size for recording is 4 GB.
The approximate storage time that can be recorded with 4GB is calculated as follows:
Approximate memory time (minutes) = (4 × 1024 × 1024 × 1024) ÷ (frequency range × 2.56 × K) ÷ 60 s ÷ number of channels to store
16-bit storage K=2 (bytes)
24-bit storage, K=4 (bytes)
example
For 1 channel, frequency range 20kHz, 16-bit saving:
The sampling frequency becomes 20000 × 2.56 = 51200 (Hz), meaning 51200 data points are acquired per second.
In the case of 16-bit, 2 bytes are required, so in terms of bytes, 102,400 bytes are stored per second.
The amount of time that can be stored on 4GB is (4 × 1024 × 1024 × 1024) ÷ (51200 × 2) ÷ 60s ÷ 1 = 699 (minutes).
| Number of saved channels | frequency range | Number of bits to store | Memory duration (minutes) |
|---|---|---|---|
| 1 | 20kHz | 16 | 699 |
| 1 | 20kHz | 24 | 349 |
| 4 | 20kHz | 16 | 174 |
| 4 | 20kHz | 24 | 87 |
| 4 | 1kHz | 16 | 3495 |
| 4 | 1kHz | 24 | 1747 |
Last updated: 2007-02-19