86100C datasheet(4/32 Pages) HP

4 / 32 page

Eye diagram mask testing

The 86100C provides efﬁcient, high-throughput

waveform compliance testing with a suite of standards

based eye-diagram masks. The test process has been

streamlined into a minimum number of keystrokes for

testing at industry standard data rates.

Standard formats

Rate

(Mb/s)

1X Gigabit Ethernet

1250

2X Gigabit Ethernet

2500

10 Gigabit Ethernet

9953.28

10 Gigabit Ethernet

10312.5

10 Gigabit Ethernet FEC

11095.7

10 Gigabit Ethernet LX4

3125

Fibre Channel

1062.5

2X Fibre Channel

2125

4X Fibre Channel

4250

8x Fibre Channel

8500

10X Fibre Channel

10518.75

10X Fibre Channel FEC

11317

16x Fibre channel

14025

Inﬁniband

2500

STM0/OC1

51.84

STM1/OC3

155.52

STM4/OC12

622.08

STM16/OC48

2488.3

STM16/OC48 FEC

2666

STM64/OC192

9953.28

STM64/OC192 FEC

10664.2

STM64/OC192 FEC

10709

STM64/OC192 Super FEC

12500

STM256/OC768

39813

STS1 EYE

51.84

STS3 EYE

155.52

Other eye-diagram masks are easily created through

scaling those listed above. In addition, mask editing

allows for new masks either by editing existing masks,

or creating new masks from scratch. A new mask can

also be created or modiﬁed on an external PC using

a text editor such as Notepad, then can be transferred

to the instrument’s hard drive using LAN or Flash drive.

Perform these mask conformance tests with convenient

user-deﬁnable measurement conditions, such as mask

margins for guardband testing, number of waveforms

tested, and stop/limit actions. Mask margin can be

determined automatically to a user deﬁnable hit/error

ratio. Transmitter waveform dispersion penalty (TWDP)

tests can be performed directly in the 86100C. Exporting

the waveform for external post processing is not required.

(Option 201 and MATLAB® required. Dispersion penalty

script for speciﬁc test standards must be loaded into

the 86100C.)

Eyeline Mode

Eyeline Mode is available in the 86100C and provides

insight into the effects of speciﬁc bit transitions within a

data pattern. The unique view assists diagnosis of device

or system failures due to speciﬁc transitions or sets of

transitions within a pattern. When combined with mask

limit tests, Eyeline Mode can quickly isolate the speciﬁc

bit that caused a mask violation.

Traditional triggering methods on an equivalent time

sampling scope are quite effective at generating eye

diagrams. However, these eye diagrams are made up of

samples whose timing relationship to the data pattern

is effectively random, so a given eye will be made up

of samples from many different bits in the pattern

taken with no speciﬁc timing order. The result is that

amplitude versus time trajectories of speciﬁc bits in

the pattern are not visible. Also, averaging of the eye

diagram is not valid, as the randomly related samples

will effectively average to the “middle” of the eye.

Eyeline Mode uses PatternLock triggering (Option 001

required) to build up an eye diagram from samples taken

sequentially through the data pattern. This maintains

a speciﬁc timing relationship between samples and

allows Eyeline Mode to draw the eye based on speciﬁc

bit trajectories. Effects of speciﬁc bit transitions can be

investigated, and averaging can be used with the eye

diagram.

PatternLock Triggering advances the

capabilities of the sampling oscilloscope

The Enhanced Trigger option (Option 001) on the 86100C

provides a fundamental capability never available

before in an equivalent time sampling oscilloscope.

This new triggering mechanism enables the DCA-J to

generate a trigger at the repetition of the input data

pattern – a pattern trigger. Historically, this required the

pattern source to provide this type of trigger to the scope.

With the press of a button, PatternLock automatically

detects the pattern length, data rate and clock rate

making the complex triggering process transparent to

the user.

PatternLock enables the 86100C to behave more like a

real-time oscilloscope in terms of user experience.

Observation of speciﬁc bits within the data pattern is

greatly simpliﬁed. Users that are familiar with real-time

oscilloscopes, but perhaps less so with equivalent time

sampling scopes will be able to ramp up quickly.

PatternLock adds another new dimension to pattern

triggering by enabling the mainframe software to take

samples at speciﬁc locations in the data pattern with

outstanding timebase accuracy. This capability is a

building block for many of the new capabilities available

in the 86100C described later.

MATLAB® is a registered trademark of The MathWorks, Inc.

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