N5457 datasheet(7/13 Pages) HP

Part #	N5457

Description	Segmented Memory Acquisition for Agilent InfiniiVision Series Oscilloscopes

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Manufacturer	HP [Agilent(Hewlett-Packard)]

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6

Figures 4a and 4b show examples

of capturing 1000 consecutive

remote frames and data frames with

the ID code of 07FHEX. This was

accomplished by setting the trigger

condition to trigger on either remote

or data frames with this specific frame

ID. Now we can easily measure the

timing latency between each remote

transfer request frame with a frame

ID of 07FHEX and its associated data

frame response with the same frame

ID. In this measurement example, the

latency between segment #1 (remote

frame) and segment #2 (data frame)

was 4.821 ms. Also note that although

not shown, the time-tag on the last

captured segment (segment #1000)

was approximately 9.5 seconds.

Capturing this much time using

conventional oscilloscope acquisition

memory at this sample rate (~4 MSa/

s) would require 38 Megapoints of

memory.

Figure 4a: Remote frame 07FHEX captured as segment #1 has a

default time-tag of 0.0 s.

Mixed-signal and serial bus applications

Figure 4b: Data frame 07FHEX captured as segment #2 indicates a

timing latency of 4.822 ms.

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