Data Sheet SHF 12125 B
SHF Communication Technologies AG

Data SheetSHF 12125 B

Compact Multi-Channel
Bit Pattern Generator
32 Gbps & 64 Gbps

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AGDescription
The SHF 12125 B is a three channel 32 Gbps/64 Gbps bit pattern generator. It features two single ended
data outputs with individual 4-Tap pre-emphasis capabilities, 2 UI skew control and duty cycle adjustment
up to 32 Gbps. In addition a differential 64 Gbps output is provided. Digital bit sequences such as standard
pseudo-random bit sequences (PRBS) or short user defined bit patterns are generated by the unit at thedata outputs. Many applications in research, product development as well as production tests require
these data streams for testing electrical/optical components or testing signal integrity in high speed digital
data communication. A wide range of operating bit rates from 7 to 64 Gbps is covered.
The operating bit rate is determined by a clock signal from an external clock source which is not part of thepattern generator. The generator operates at full clock, i.e. a 32 GHz clock signal is required for 32 Gbps
operation, at the two 32 Gbps outputs. With reference to the 64 Gbps output a clock frequency of half theoutput bit rate is required.
For trigger purposes three clock output signals (clock, clock/2 and clock/16) are provided on the rear panelof the instrument.
Its compact size allows placement very close to the DUT in the test setup.

Features•

One differential output channel up to 64 Gbps (14 to 64 Gbps operation, ‘gap-free’)•Two single ended output channels up to 32 Gbps (7 to 32 Gbps operation, ‘gap-free’)•Output amplitude control•

4-Tap-FIR pre-emphasis individually adjustable for both 32 Gbps channels•

Skew control over two UI with 1/32 UI resolution for each 32 Gbps output•

PRBS 27-1, 211-1, 215-1, 223-1, 231-1•

32 Bit user programmable pattern @ 32 Gbps channels•

Three clock outputs (input clock, input clock divided-by-2 and 16) for trigger purposes•

Built-in frequency counter for input clock•

Control by Ethernet interface•

Low power consumption•Compact size: 221.4 mm (W) x 50.8 mm (H) x 177 mm (D)SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AGApplications•Research, Development, Production Tests•

On-Wafer Testing•

CEI-28G•

100G Ethernet•

Infiniband•

Fibre Channel ®

•High Speed Serial•

Backplane Applications

Block Diagram
Ch1 Data

Pattern Gen.
Channel 1

Clock In

2:1
Mux

Clock OutClock/2 Out/2

Clock/16 Out/8

Pattern Gen.
Channel 2

Ch3 Data
Ch3 Data

Ch2 Data

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AGSpecifications
Parameter

UnitSymbol

MinTypMax

Comment

Data Outputs (Channel 1 and 2, single ended 32 Gbps)
Minimum Bit Rate

Gbps

7

Maximum Bit Rate

Gbps

Output Amplitude

mV

Vout

Jitter (RMS)

fs

Jitter (PP)ps

Crossing%

Duty Cycle

32430

500

adjustable by up to -6 dB,
AC coupled, no pre-emphasis
applied

JRMS

450

600

measured at 32 Gbps,
on scope display1

JPP

2.74

measured at 32 Gbps,
on scope display1475053%

4750

53of two consecutive eyes,
can be adjusted using BCC

Skew Control

UI-1+1adjustable in 1/32 UI-steps

Connector TypeΩ

Rise/Fall Time

ps350

50
tr/tf

142.92 mm (K) female
1520%...80%,
on scope display

Data Outputs (Channel 3, differential 64 Gbps)
Minimum Bit Rate

Gbps

Maximum Bit Rate

Gbps

Output Amplitude

mVVoutJitter (RMS)

fsJRMS

Connector TypeΩ

Rise/Fall Time

ps1

1464
550

630

800

Eye Amplitude;
Single ended;
Adjustable up to -3 dB

350500measured at 64 Gbps,
on scope display150tr/tf

81.85 mm (V) female
1020%...80%,
on scope display

Measured with Agilent 86100A with 70 GHz sampling head and precision time base triggered by Clk or Clk/2 output, using PRBS 231-1

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AG

Parameter

Unit

SymbolMin

TypMaxComment

ClockConnector TypeClock Input
Clock Output

2.92 mm (K) female
Ω2.92 mm (K) female

50

Clock/2 Output

2.92 mm (K) female

Clock/16 Output

2.92 mm (K) female

Clock Input Frequency

GHzfin_clock

732

Input LevelmVpp

Vin_clock

600

1000

AC coupledmVpp

Vout_clock

Output Level
Clock
Clock/2
Clock/16

450550700

AC coupled

600

750

900

AC coupled

300

400

550

AC coupled

Output Frequency
Clock

GHz

Clock/2

GHz

Clock/16

GHzfout_clock

732

Input frequency

3.516

half of input frequency

0.438

2

input frequency/16

Pattern
ITU-T (CCITT) conform PRBS
patterns at a length of27-1, 211-1, 215-1, 223-1 & 231-1 plus
user defined pattern

Output Pattern

User Pattern Memory Sizebit

32
Output can be set to transmit aclock pattern clock/2, clock/4,clock/8, clock/16

Clock Output PatternGeneral
Supply Voltage

VVcc

11.5

12Power Consumption

WPtot

Heightmm

H50.8

WidthmmW

221.4

Depthmm

D177

Weightgm

Operating Temperature°C

Tambient

12.5+12 V switching power supply is
included

1317001535

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AG

Graphical User Interface

User Interface in 2x32 Gbps Mode for Channels 1 and 2

User Interface in 64 Gbps Mode for Channel 3

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AGPre-Emphasis Terms and Definitions (Channel 1 and 2 only)
Pre-emphasis based on a finite impulse response (FIR) filter is a way to compensate for high frequency
losses in a transmission path. It helps to reduce the inter-symbol interference when the filter coefficientscan be set adequately to compensate the imperfections of the channel’s impulse response. The basic idea isto boost the high-frequency components while leaving the low frequency components in their originalstate.
The SHF 12124 B features a 4-Tap FIR filter structure for each channel as depicted in the following picture.
Pre-Cursor

Main

1st Post-Cursor 2nd Post-Cursor

+X

Input

C(-1)

X

1UI
Delay+

C(0)

X+

C(1)

1UI
Delay

X

Output

C(2)

1UI
Delay

The structure can be used very flexible. Up to four taps can be used and each one is individuallycontrollable. Polarity inversion allows to add or substract the tap from the main signal. Depending on theweight of the taps different configurations as pre- and post-cursors are possible. The most common
configuration is probably the use of one pre- and two post-cursors. As depicted in the following picture.

1st Post-Cursor Vpst1

2nd Post-Cursor Vpst2

1. Post-Cursor

Vpst1
Vpst2
Vamp
Main Vamp

2. Post-Cursor

Eye Amplitude

0Vpre

Pre-Cursor

Pre-Cursor Vpre

The ratio of the individual taps to the final eye amplitude is given by the following equations:𝑅𝑝𝑟𝑒 [𝑑𝐵] = 20 ∙ 𝑙𝑜𝑔 (|𝑉𝑝𝑟𝑒 |)𝑉𝑎𝑚𝑝

𝑅𝑝𝑠𝑡1 [𝑑𝐵] = 20 ∙ 𝑙𝑜𝑔 (|𝑉𝑝𝑠𝑡1 |)𝑉𝑎𝑚𝑝

𝑅𝑝𝑠𝑡2 [𝑑𝐵] = 20 ∙ 𝑙𝑜𝑔 (|𝑉𝑝𝑠𝑡2 |)𝑉𝑎𝑚𝑝

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AG

The following pictures show how pre- and post-cursor appear in the waveform or eye diagram of the signal.

10 Gbps – One Pre- & Two Post-Cursors

10 Gbps – One Pre- & Two Post-Cursors

GraphicalPreview

Individual
Tap Settings

PreEmphasis
Channel 1
PreEmphasis
Channel 2

Main Tap
Selection
Pre-Emphasis Software RepresentationSHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 8

Data Sheet SHF 12125 B
SHF Communication Technologies AGSkew Control Function (Channel 1 and 2 only)
The skew control function allows adjusting the channel timing relative to each other. As a result, timing
delays between the two output channels can be compensated. The skew can be controlled in steps of
1/32 UI. The maximum skew range is 2 UI, i.e. two eye lengths. Since the built-in phase rotator is optimized
for operation between 25 Gbps and 30 Gbps step accuracy might degrade at lower and higher bitrates.

Skew
ControlChannel 1+5.5 ps

SkewControlChannel 2-5.5 ps

Skew Control Software Representation

0 ps

Skew Control Eye Diagram Representation

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 9

Data Sheet SHF 12125 B
SHF Communication Technologies AG

User Pattern Function
Besides the five pseudo-random bit sequences and the clock patterns a 32-Bit user pattern can betransmitted from each output. The user pattern can be set using a graphical representation in the userinterface.

Toggle User
Pattern Bits
Channel 1

Toggle User
Pattern Bits
Channel 2User Pattern Software Representation

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 10

Data Sheet SHF 12125 B
SHF Communication Technologies AG

Duty Cycle Control Function (Channel 1 and 2 only)
The duty cycle control function allows adjusting the length of consecutive eyes with a range ofapproximately +/-5% and with a 0.33% resolution.

DutyCycle
Channel 1

DutyCycle
Channel 2

Duty Cycle Control Software RepresentationDuty Cycle Control Set to 50%

Duty Cycle Control Set to less than 50%

Duty Cycle Control Set to more than 50%

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 11

Data Sheet SHF 12125 B
SHF Communication Technologies AG

Typical Output Waveforms
Data Output Signals (Channel 1 and 2 only, Pre-Emphasis completely deactivated)

32 Gbps output eye at maximum output level

30 Gbps output eye at maximum output level

28 Gbps output eye at maximum output level

25 Gbps output eye at maximum output level

20 Gbps output eye at maximum output level

16 Gbps output eye at maximum output level

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 12

Data Sheet SHF 12125 B
SHF Communication Technologies AG

14 Gbps output eye at maximum output level

10 Gbps output eye at maximum output level

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Data Sheet SHF 12125 B
SHF Communication Technologies AG

Data Output Signals (Channel 3 only)

Out @ 64 Gbps

Out inv. @ 64 Gbps

Out @ 6 0 G bps

Out i nv . @ 60 G bps

Out @ 5 6 G bps

Out i nv . @ 56 G bps

SHF reserves the right to change specifications and design without notice
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Data Sheet SHF 12125 B
SHF Communication Technologies AG

Out @ 5 0 G bps

Out i nv . @ 50 G bps

Out @ 4 3 G bps

Out i nv . @ 43 G bps

Out @ 3 2 G bps

Out i nv . @ 32 G bps

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 15

Data Sheet SHF 12125 B
SHF Communication Technologies AGOut @ 2 8 G bps

Out i nv . @ 28 G bps

Out @ 2 5 G bps

Out i nv . @ 25 G bps

Out @ 1 6 G bps

Out i nv . @ 16 G bps

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 16

Data Sheet SHF 12125 B
SHF Communication Technologies AG

Clock Output Signals

Clock output signal @ 32 Gbps data rate

Clock output signal @ 28 Gbps data rate

Clock output signal @ 20 Gbps data rate

Clock output signal @ 10 Gbps data rate

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 17

Data Sheet SHF 12125 B
SHF Communication Technologies AG

Clock/2 Output Signals

Clock/2 output signal @ 32 Gbps data rate

Clock/2 output signal @ 28 Gbps data rate

Clock/2 output signal @ 20 Gbps data rate

Clock/2 output signal @ 10 Gbps data rate

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 18

Data Sheet SHF 12125 B
SHF Communication Technologies AG

Clock/16 Output Signals

Clock/16 output signal @ 32 Gbps data rate

Clock/16 output signal @ 28 Gbps data rate

Clock/16 output signal @ 20 Gbps data rate

Clock/16 output signal @ 10 Gbps data rate

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 19

Data Sheet SHF 12125 B
SHF Communication Technologies AG

Mechanical Drawing
SHF 12125 B

Bit Pattern Generator

PowerCh 1

Ch 2Ch 3

Ch 3

0.5 Vpp Max

0.5 Vpp Max

0.8 Vpp Max

0.8 Vpp Max

Outputs

OnOff

58.9Error

50  / 2.92 mm Female

50  / 1.85 mm Female

221.5101816130.77.24167510.3

7.2

177845132434.3

75
119.2
129.2abdc

50  / 2.92 mm Female
12 V / 2A
0.8 Vpp Max

1 Vpp Max

Clk Out

Clk In0.6 Vpp Max

Clk/2 OutConnector
2.92mm (K) Female
2.92mm (K) Female
1.85mm (V) Female
1.85mm (V) Female
2.92mm (K) Female
2.92mm (K) Female
2.92mm (K) Female
2.92mm (K) FemaleUSB

0.8 Vpp Max

Clk/16 Out

Designation
Channel 1
Channel 2
Channel 3
Channel 3
Clock Input
Clock Output
Clock/2 Output
Clock/16 Output

Pos.
abcdEthernet

Pos.
12345678Designation
USBGND
Ethernet
Power Supply

all dimensions in mm

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 20

Data Sheet SHF 12125 B
SHF Communication Technologies AG

SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23 D | 12277 Berlin | Germany+49 30 772 051 0
sales@shf-communication.com
www.shf-communication.com

SHF reserves the right to change specifications and design without notice
V005 - Aug. 29, 2023 - Page 21