Keysigth Technologies N4903B J-BERT

dataTec ▪ Ferdinand-Lassalle-Str. 52 ▪ 72770 Reutlingen ▪ Tel. 07121 / 51 50 50 ▪ Fax 07121 / 51 50 10 ▪ [e-mail] ▪ www.datatec.de
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14 | Keysight | J-BERT N4903B High-Performance Serial BERT, 7 Gb/s and 12.5 Gb/s - Data Sheet
Jitter Tolerance Test Specications
The built-in jitter sources are designed to cover DisplayPort
PI Express SATA SB3 ibre hannel PI B-DIMM EI 6
G/11 G 10 GbE and XP/XI SP jitter tolerance test needs.
Periodic jitter ption J10
This injects sinusoidal rectangular
or triangular jitter over a wide
freuency range.
Range
1
0 to 220 ps pp at all data rates
0 to 610 ps pp at data rates
 5 s
Modulation frequency
Sine
Triangle/square
One- and two-tone possible
1 kHz to 300 MHz
1 kHz to 20 MHz
Modulation frequency
accuracy
0.5% ± 25 Hz typical
Jitter amplitude accuracy 10% ± 1 ps typical
Impacted signals 610 ps delay line: only on data and aux data
outputs
220 ps delay line: user selectable for data
and aux data outputs, clock output
Jitter delay 0 to ±2.2 ns, 100 ps steps between jitter
on data and aux data output versus jitter on
clock output for all jitter sources using the
220 ps delay line.
1. Available range depends on modulation freuency and data rate see
igures 18 and 19.
igure 18. Periodic jitter maximum for data rates  3.375 Gb/s using the 610 ps
delay line
Jitter
amplitude
(UI)
Modulation
frequency (Hz)
300 MHz
Sine wave
Data rate (Gb/s)
12.5 Gb/s
2.5 Gb/s
2.75 UI
2.2 UI
1.1 UI
0.55 UI
5.0 Gb/s
10 Gb/s
Sine wave
triangular wave
square wave
20 MHz1 kHz
220 ps
300 MHz
tbd
tbd
Sine wave
Triangular,
square wave
Jitter
amplitude
(UI)
Modulation
frequency (Hz)
Modulation
frequency
(MHz)
300
80
1.1*
Sine wave
Sine wave,
trinagular,
square wave
Data
rate x
610 ps
0.001
20
250
0.5*
* 610 ps max.
Auxillary cloc output AX  T
The built-in SS cloc modulation source is available only in
combination with ption J10. It either generates a freuency
modulated cloc signal SS or a phase modulated cloc signal
residual SS as used in some computer or storage standards
such as PIe SB and SATA to spread EMI. If residual SS is
enabled sinusoidal jitter is not available however all other
jitter sources can be used. If SS is enabled sinusoidal jitter is
available in a limited range however all other jitter sources can
be used without restrictions. SS  of max  SJ  of max
 100.
SSC frequency deviation:
up-spread/down-spread
0 to -0.5% (5,000 ppm),
2% typical accuracy
SSC frequency deviation:
center-spread
0 to 1.0% pp (10,000 ppm),
2 % typical accuracy. Can be used also for
down-spread SSC, allowing more SJ range
Residual SSC phase
modulation
0 to 100 ps
Modulation frequency 100 Hz to 100 kHz
Modulation waveform Triangular or arbitrary.
ritrar les can e uploaded as tt le
Values from -1.0 to +1.0 for 1.0%
center-spread modulation, maximum of
16384 data points
Signals impacted Can be enabled for either data and aux data
output and/or clock output and trigger/ref
clock out
* Whichever
is less
TBD
300 MHz
20 MHz
1 UI or
610 ps*
Sine wave
Sine wave,
Triangular,
Square wave
Jitter
amplitude
(UI)
Modulation
frequency (Hz)
Jitter
amplitude
(UI)
Modulation
frequency
300 MHz
Sine wave
Sine wave
For all data rates
For data rates ≥ 8.1 Gb/s
Data rate (Gb/s)
12.5 Gb/s
2.5 Gb/s
2.75 UI
2.2 UI
1.1 UI
0.55 UI
5.0 Gb/s
10 Gb/s
Sine wave
triangular wave
square wave
20 MHz1 kHz
Data rate x 220 ps
3000.001 20
100
1.0*
* 220 ps max.
Sine wave
triangular
square wave
Jitter
amplitude
(UI)
Modulation
frequency (MHz)
igure 19. Periodic jitter maximum using the 220 ps delay line
Table 12. Spread spectrum clocing SS characteristics
Table 11. Specications for periodic jitter PJ1 PJ2