SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772051-0 • Fax +49 30 7531078
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 11220 A
60 GBaud PAM4 Sampler

SHF reserves the right to change specifications and design without notice - SHF 11220 A – V 001 – June 15, 2018

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Description
The SHF 11220 A is a PAM4 sampler operating at symbol rates up to 58 GBaud for use in broadband
test setups and telecom transmission systems. The module features a high sensitivity D-type flip-flop(DFF) with wide dynamic range. Through the software GUI, the threshold and time delay position canbe controlled to explore the error characteristics of the input PAM4 signal. At each position, the DFF
outputs a NRZ signal to be further processed by an error analyzer.
For BER measurements, the module is intended to operate with the SHF 11104 A Error analyzer.

Features
••
•
•
•
•
•

Operation at least up to 58 GBaud (116 Gbps) @ PAM4
Key element is an high speed, high sensitivity D-type flip-flop (DFF) with wide dynamic rangeSamples a ‘vertical slice’ of input PAM4 signal
Outputs a NRZ signal for error analysis at the corresponding vertical threshold value
Actual error counting is done in the SHF 11104 A Error Analyzer (EA)
1Using SHF’s existing 3-pass approach (samples the three PAM4 eyes, one at a time)
Bert Control Center (BCC) unifies the Sampler and the EA to virtually one single EA-Instrument.

Applications••

100, 200, 400 Gbps and 1 Tbps system evaluation & development
Broadband test and measurement equipment

Block Diagram
PAM4 signal InDFFDataData

To SHF EA
Clock Out (to SHF EA)

x2

1

Clock In (e.g. from SHF BPG or CR)
Frequency half of the symbol rate

For details on the 3-pass approach, please be referred to the data sheet of the SHF 11104 A Error Analyzer.

SHF reserves the right to change specifications and design without notice - SHF 11220 A – V 001 – June 15, 2018

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Ease of Use
Housed in a small benchtop case, this remote head can be easily embedded in the customer’s test
environment close to the DUT.

SHF 11220 A

The SHF 11220 A requires a clock signal at half of the input baud rate as master clock. Its operation can becontrolled either through the PAM4 Sampler GUI or the PAM analysis window under the SHF 11104 AError Analyzer. In the PAM4 Sampler GUI, the built-in eye scan function has the capability to map out aneye pattern of the input PAM4 signal, as well as executing a fast “Auto-search” to determine the thresholdvalues and delay of the input signal.
For actual BER measurements, the EA PAM Analysis GUI is used. This features the same fast “autosearch” function for thresholds and delay, and deploys the 3-pass BER measurement approach to calculate
the total BER of the PAM4 signal.

BCC SHF 11220 A PAM Sampler GUI, showing the eye scan of a 53 GBaud PAM4 signal

BCC SHF 11104 A EA GUI, showing the eye contours and error rates of a 53 GBaud PAM4 signal

SHF reserves the right to change specifications and design without notice - SHF 11220 A – V 001 – June 15, 2018

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Absolute Maximum Ratings
Parameter

Unit

Symbol

Min.

Typ.

Max.

Comment

Data Input Voltage

mV

Vdata in1200

Peak-to-Peak

Clock Input Voltage

mVVclk in1200

Peak-to-Peak

External DC Voltage on
RF Clock Input PortVVDCin-3+3AC coupled input

External DC Voltage on
RF Data Input Ports

VVDCin-3+3AC coupled input

External DC Voltage on
RF Output PortsV

VDCout-3+3AC coupled input

DC Supply Voltage

VVcc

Unit

SymbolMin. Input Data Rate

GBaud

Rin,minMax. Input Data Rate

GBaud

Rin,max

Input Parameters

13Specifications
Parameter

Min.

Typ.

Max.

CommentInput Parameters
30582040150

2PAM4 Sensitivity

individual eye heights

60mV

BER < 1E-11BER < 1E-93050200

Up to 53 GBaud
Up to 56 GBaud
Up to 60 GBaud

70

Adjustable in 0.1 ps steps

800

AC coupled

800

Peak-to-Peak;
500 mV recommended

Delay /Clock Phase Adjustment

psMax. Input Amplitude

mVpp

Vin

Clock Input VoltagemVpp

Vclk in

300

Data Output Voltage

mVpp

VOut

300
600

Single-ended
Differential

Clock Output Voltage

mVVClkout

300

Peak-to-Peak

0Output ParametersConnectors

1.85 mm (V) male2

Value corresponds to the measured individual eye heights of a symmetric PAM4 signal on an Agilent 86100 C with 70 GHzsamplers using 223-1 PRBS at a BER limit of 10-9.
SHF reserves the right to change specifications and design without notice - SHF 11220 A – V 001 – June 15, 2018

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Outline Drawing – SHF 11220 A
SHF 11220 A

PAM4 Sampler

PowerData In

Outputs< 1.2 Vpp

OnOff50.8Error

50  /1.85mm Female

221.5

131.5
66.5
26.4

7.2

46.5

4

35

10.4

1772155.1

29.1

dbac
Ethernet
12 V / 3 A

50  /1.85mm Female

50  /1.85mm Female

USB< 1.0 Vpp

< 1.0 Vpp

Clock OutClock In0.6 Vpp Max

Data Out

0.6 Vpp Max

Data Out

Pos.

Designation

Connector

Pos.

Designation

1

Data In1.85 mm (V) Female

aGND

2

Data Out1.85 mm (V) Female

bUSB

3

Data Out1.85 mm (V) Female

cEthernet

4

Clock Out1.85 mm (V) Female

dPower Supply

5

Clock In1.85 mm (V) Female

All dimensions in mm

SHF reserves the right to change specifications and design without notice - SHF 11220 A – V 001 – June 15, 2018

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