SHF Communication Technologies AGWilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772051-0 • Fax +49 30 7531078
E-Mail: sales@shf-communication.com • Web: www.shf-communication.com

Datasheet
SHF 11221 A120 Gbps 1:2 Demultiplexer

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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Description
The SHF 11221 A is a 1:2 demultiplexer operating at bit rates up to 120 Gbps for use in broadband test
setups and telecom transmission systems. The module essentially is a high sensitivity 1:2
demultiplexer extended by an automated delay line for computer-controlled sampling time adjustments.
The threshold and time delay position can be controlled to explore the error characteristics of the input
NRZ signal. At each position, the demultiplexer outputs two half speed NRZ signals to be further
processed by an error analyzer.
For BER measurements, the module is optimized to operate with the SHF 11104 A Error analyzer.

Features•••••••

Broadband operation up to 120 Gbps
Differential data input
Quarter-clock systemData Input Sensitivity <110 mV (single ended)
Single ended data outputs
Time delay and threshold adjustment via software
Graphical eye scan for signal visualization

Applications••

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

Block Diagram

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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

SHF 11221 AThe SHF 11221 A requires a clock signal at quarter the input bit rate as master clock.
The operation can be controlled by the Demultiplexer GUI in the SHF BERT Control Center (BCC) or via
simple text commands for integration in other software environments.
In the Demultiplexer GUI, the built-in eye scan function has the capability to map out an eye pattern of theinput NRZ signal, as well as to execute a fast “Auto-search” to determine the threshold and delay of theinput.
For BER measurements, a dual channel SHF 11104 A error analyzer is required. The measurement
software has been tailored to integrate the over-all operation with the SHF 11104 A, and combine the BER
data taken from the two demultiplexed channels.

BCC SHF 11221 A Demultiplexer GUI, showing the eye scan of an 120 Gbps NRZ signal

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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Absolute Maximum Ratings
Parameter

Unit

Symbol

Min.

Typ.

Max.

Comment

Data Input Voltage

mV

Vdata in900

Peak-to-Peak

Clock Input Voltage

mVVclk in900

Peak-to-Peak

External DC Voltage onRF 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 Ports

VVDCout-3+3AC coupled input

DC Supply Voltage

VVcc

Input Parameters

13SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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Specifications
Parameter

Unit

SymbolMin.

Minimum Input Data Rate

GBaud

Rin,minMaximum Input Data Rate

GBaudRin,max

Minimum Clock Input
Frequency

GHzFin,min

Maximum Clock InputFrequency

GHzFin,max

30

Clock Input VoltagemVpp

Vclk in300

Data Input Voltage

mV

Vdata inTyp.

Max.

CommentInput Parameters
60120
15

quarter of the input bit rate

400

800

Peak-to-Peak;
500 mV recommended

800

Eye Amplitude;
Single-ended≤ 80 Gbps> 80 …≤ 100 Gbps
> 100 Gbps
Eye height,
Single-ended;
On scope display;See page 7

60
80
110

Data Input Sensitivity

mV

Delay /
Clock Phase Adjustment

psquarter of the input bit rate

060

Adjustable in 0.1 ps steps

Output Parameters
Data Output Voltage

mVVOut350400

Eye Amplitude;
Single-ended

Clock Output Voltage

mVpp

VClkout

450600Peak-to-Peak

Del. Clock Output Voltage

mVpp

VClkout

450600Peak-to-Peak
1.85 mm (V) maleConnectors
GeneralSupply Voltage

VVc

Supply Current

mAIc

1670

Power Consumption

W

Pd

20

Heightmm

H

58.9

WidthmmW

221.4

Depthmm

D177

Weightkg

m

1.75
2Operating Temperature°C

T

+11.5

10+12+12.5

2.1 mm DC Power Jack;+12V switching power supply
is included@ VC = +12 V

without power supply
with power supply
35

Ambient temperature

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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Typical Output Eye Diagrams
31

The measurements below had been performed using a SHF 603 B MUX (PRBS 2 -1) and a Keysight
DCA-X N1000 A with Precision Timebase and 70 GHz Sampling Head (80N01). The outputs of thedemultiplexer module had been connected by 10 dB attenuators to the DSA input.

Out A @ 60 Gbps Output Bitrate

Out B @ 60 Gbps Output Bitrate

Out A @ 50 Gbps Output Bitrate

Out B @ 50 Gbps Output Bitrate

Out A @ 40 Gbps Output Bitrate

Out B @ 40 Gbps Output Bitrate

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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Typical Performance
31

The measurements shown below had been performed using a SHF C603 B MUX (PRBS 2 -1), aSHF 11104 A Error Analyzer, a Keysight DCA-X N1000 A with Precision Timebase and 70 GHz
Sampling Head (80N01) to determine the eye height of the input signal. For the sensitivity-9measurement the input signal had been reduced until a BER limit of <10 was achieved.

Data Input Sensitivity
Eye Height [mV]single-ended

120110100908070605040302010060708090100110120

Input Bit Rate [Gbps]

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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Outline Drawing – SHF 11221 A
SHF 11221 A

1:2 DEMUX

Data In

Data In< 1.2 Vpp

< 1.2 Vpp

PowerOutputs
OnOff

58.8

Error

50  /1.85mm Female

221.5

131.5
111.5
88.9
66.5
34.2

7.2

46.5

4567

10.4

177321

45.1
55.136.8dcba

Ethernet
12 V / 3 A

50  /1.85mm Female

USB< 1.0 Vpp< 1.0 Vpp

Clock Out< 1.0 Vpp

Del. Clock Out

0.6 Vpp Max

Data A

0.6 Vpp Max

Data B

Designation
Data In
Data In
Data B
Data A
Del. Clock Out
Clock OutClock In

Clock In

Pos.
1234567Connector
1.85 mm (V) Female
1.85 mm (V) Female
1.85 mm (V) Female
1.85 mm (V) Female
1.85 mm (V) Female
1.85 mm (V) Female
1.85 mm (V) Female

Pos.
abcd

Designation
GNDUSB
Ethernet
Power Supply

All dimensions in mm

SHF reserves the right to change specifications and design without notice - SHF 11221 A – V 002 – March 01, 2022

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