DV3100 DIGIVIEW, DV3100 Datasheet - Page 113

• Manufacturer Part Number: DV3100
• Description: LOGIC ANALYSER, DIGITAL, 100MHZ, 18CH
• Manufacturer: DIGIVIEW

Specifications of DV3100

• No. Of Data Channels: 18
• No. Of Clock Inputs: 8
• Frequency: 100MHz
• Power Consumption: 2.5W
• External Height: 0.75"
• External Width: 2.8"
• External Depth: 4.75"
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Appendicies
DigiView Compression
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There is no need to understand DigiView's compression to use it. This is just here for the
curious (or skeptical).
We want two conflicting features in a logic analyzer; high sample RATES (high resolution) and
high sample COUNTs (a lot of data/time). We usually reduce sampling RATES to capture more
data because sample COUNTs (data buffer depth) is fixed. To combat this trade-off, the sample
buffer is made as deep as possible. However, this approach is linear and does not scale well.
Doubling the buffer doubles either TIME or sample RESOLUTION. It can take gigabytes of
memory to achieve both if your data transitions are fairly sparse (microsecond or more gaps).
Ideally, we would like to have high sample RATES AND high sample COUNTs to capture a long
time-span with high resolution.
DigiView achieves this, like other logic analyzers, by using a deep data buffer. However, DigiView
also attacks this problem from another, even more effective angle. DigiView uses one or more
real-time, hardware based compression techniques to compact the captured data. This has a
much greater impact than increasing the buffer depth.
The data captured in logic analyzer applications is often stable for multiple sample periods
(particularly at higher sample rates). This, coupled with fast sample times and a very long
run-length limit, makes our compression very applicable in real-world applications.
To illustrate the effect of DigiView's compression and also present it in a manner that is more
relevant to real-world usage, we have calculated several typical performance benchmarks for each
DigiView Model and sampling mode. You may actually see better performance ratings than the
conservative estimations below.
DV1-100
Channels:
Sample Rate:
Full Resolution Capture:
------------------------
Minimum:
Maximum:
Serial (assumes > 390 Baud, < 2.6ms between bits/bytes)
DigiView Compression
Hardware Specifications
RS232:
SYNC:
I2C:
- 18
- 100 MHz
128 (x18) samples, @ 10ns = 1.3ms
2^35 (34 Billion) samples @ 10ns = 5.7 Minutes
> 23,000 characters
> 6,000 characters
> 5,000 characters
Appendicies
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