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Sinusoidal jitter (Option J10)

This injects sinusoidal jitter in the lower

frequency range with multiple UIs.

Table 13. Speciﬁcations for sinusoidal jitter (SJ)

Range

2 UI at 5 MHz

1000 UI at 10 kHz

For frequencies between 10 kHz and

5 MHz the jitter amplitude

= UI

Modulation frequency 100 Hz to 5 MHz (For higher modulation

frequencies, see Table 10)

Modulation frequency

accuracy

0.5% typical

Jitter amplitude accuracy 2% ± 1 ps typical

Impacted signals User selectable for data and aux data

outputs, clock output and trigger/ref

clock output.

1. Available range depends on modulation frequency and data rate

(see Figure 20).

10 MHz

n x f (mod)

Jitter Tolerance Test Speciﬁcations

Figure 20. Sinusoidal jitter maximum UI

100 Hz 10 kHz 5 MHz

2UI

Modulation

frequency

Jitter

amplitude

(UI)

1000 UI

Data rate

Max UI at

modulation

frequency

100 Hz to 10 kHz

Max UI at

modulation

frequency

5 MHz

6.75 Gb/s to 12.5 Gb/s n = 1 1000 UI 2 UI

3.375 Gb/s to 6.75 Gb/s n = 2 500 UI 1 UI

1.6875 Gb/s to 3.375 Gb/s n = 4 250 UI 0.5 UI

843,75 Mb/s to 1.6875 Gb/s n = 8 125 UI 0.25 UI

620 Mb/s to 843.75 Mb/s n = 16 62.5 UI 0.125 UI

Random jitter (Option J10)

This injects random jitter with a high band-

width and excellent crest factor.

It also allows injecting a spectrally distrib-

uted random jitter profile, as required for

PCIe 2.0 receiver test.

Table 14. Speciﬁcations for random jitter (RJ)

Range • 0 to 15.7 ps rms (0 to 220 ps pp) at

data rates < 8.1 Gb/s

• 0 to 72 mUI (0 to 1UI pp) at data

rates ≥ 8.1 Gb/s

• 0 to 8 ps rms ( 0 to 112 ps pp) if

100 MHz low-pass ﬁlter is turned on

sRJ If spectrally distributed random jitter

(sRJ) is used, the same limits apply to

the square root sum of LF-RJ and HF-

RJ components. See Figure 21.

Crest factor 14 (pp to rms ratio)

Bandwidth 50 kHz to 1 GHz

Filter • 10 MHz high-pass

• 100 MHz low-pass

• 500 MHz low-pass

Can be turned on or off individually to

limit jitter bandwidth

Jitter amplitude accuracy 10% ± 0.2 ps typical

Figure 21. Spectrally distributed RJ allows to inject low frequency and

high frequency RJ: this is required for compliant PCIe 2 receiver testing

Mod ulation

frequency

100 MHz 1 GHz10 kH z

R J-H F

R J-LF

1.5 M H z

R J jitter

amplitude

(ps rms/√Hz)

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 25 26

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