PPG1251 Series Datasheet

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The Tektronix PPG1251 PatternPro® programmable pattern generator provides pattern generation for high-speed Datacom testing.

Key performance specifications
  • 800 Mb/s to 12.5 Gb/s data rate range
  • 250 mV to 2.0 V output amplitude
  • -2.0 V to 3.0 V offset window
  • 35% to 65% programmable crossing point
Key features
  • Programmable data rate, amplitude, offset, and crossing point
  • Differential data, pattern trigger, clock/n, and full rate clock outputs
  • Integrated programmable clock source
  • PRBS and user defined patterns
  • Option PPG1251 JIT includes SJ, PJ, and RJ insertion
  • Front panel touch screen GUI and USB computer control
  • High Speed Serial data testing
  • Semiconductor & component testing
  • R&D design verification

Product description

The Tektronix PPG1251 is a fully programmable instrument with an integrated clock source. This pattern generator features high-performance DC coupled limiting amplifiers that result in accurate, fast rise time data signals. Option PPG1251 JIT adds built-in impairments, including SJ, PJ, and RJ insertion.


Differential/complimentary output, Positive and negative differential outputs are independently programmable.
250 mV to 2.0 V
500 mV to 4.0 V
Rise/fall time
Scope bandwidth can impact the measured signal rise time.
20 to 80%
17 ps, typical
10 to 90 %
25 ps, typical

-2.0 V to +3.0 V window, programmable/adjustable

Crossing point range
35% to 65% typical
Output impedance
50 Ω
100 Ω
Clock outputs
Full rate clock output
AC coupled, single-ended
400 mVp-p, typical
Trigger output
Programmed as pattern trigger or clock/n
-600 mV to 0 V
Connector type
Data patterns
Pattern type
Data (from memory) or PRBS
Data rate
800 Mb/s to 12.5 Gb/s
10 kb/s
±5 ppm
PRBS pattern lengths
27 -1 bits
Polynomial = X7 + X6 + 1 
215 - 1 bits
Polynomial = X15 + X14 + 1 
223 - 1 bits
Polynomial = X23 + X18 + 1 
231 - 1 bits
Polynomial = X31 + X28 + 1 
Data pattern depth
512 kbit
Programmable error insertion
Single bit
Jitter insertion option (PPG1251 JIT)
High frequency jitter insertion
Peak-to-peak range for all sources combined.
Amplitude range
0 to 200 psp-p
Built-in sine source
Programmable from either the front panel touch screen or remote control.
Frequency range
5 kHz to 200 MHz
Amplitude range
0 to 200 psp-p
Built-in random noise source
Programmable from either the front panel touch screen or remote control.
Amplitude range
0 to 25 ps RMS
Low frequency sine/periodic jitter
Programmable from either the front panel touch screen or remote control.
Frequency range
10 Hz to 1 MHz
Maximum amplitude
100 UI @ 0 to 10 kHz, 10 UI @ 100 kHz, 1 UI @ 1 MHz
±10%, typical
SSC Modulation
Programmable from either the front panel touch screen or remote control
Modulation frequency
28 kHz to 34 kHz
Frequency deviation
0 to 0.5% peak-to-peak
Modulation type
down/center/up spread
Modulation waveform
External clock inputs
Frequency range
6.25 GHz to 12.5 GHz
Input signal
400 mVp-p, typical, AC coupled
Maximum input signal
1 Vp-p
Input impedance
50 Ω, AC-coupled
Control interfaces
Front panel touchscreen GUI
Yes, edit all instrument settings.
Computer programmable interface
USB TMC, program all instrument settings.
Physical characteristics
Front panel width (with mounting tabs)
48.3 cm (19.0 in)
13.3 cm (5.25 in)
Depth (rack mount)
35.1 cm (13.8 in)
11.1 kg (24.5 lbs)
Operating temperature
0 °C to 40 °C (32 °F to 104 °F)
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