SHF Communication Technologies AGWilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone ++49 30 / 772 05 10 • Fax ++49 30 / 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 41211C
Clock Recovery
Optical Receiver with differential out

SHF reserves the right to change specifications and design without notice – SHF 41211C v001 – 22.06.2010

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Description
The SHF 41211C is an optical receiver and clock recovery unit. This plug-in module is part of the SHF
modular measurement series and needs to be installed in a mainframe type SHF 10001A or SHF 10000A/B.
Together with other plug-in modules from this instrument series, a modular and scalable measurement
system can be configured. Field installation or upgrade by the end-user is possible for this part of equipment.
It can be specified as optical receiver (option OE), clock recovery (either option CR25 or CR28) or with both
options. Both options are separate building blocks, they are not connected internally!
The optical receiver converts optical signals with a bit rate up to 32 Gbps into electrical signals. The wide
output dynamic range combined with excellent pulse behavior makes the device ideal for optical system
research.
The Clock Recovery is designed to extract and synchronize the clock from a serial data stream. It operates atbit rates from 19 to 26 (CR25) or 25.3 to 32 (CR28) Gbps. An internal synthesizer provides a reference clock
for the whole bit rate range. The SHF 41211C can be operated remotely via Ethernet-connection from a PC
running the SHF BERT Control Center control software (BCC). Its programming features allow automatedmeasurements using test programs like Agilent VEE or National Instruments LabView.

Features
Clock Recovery•

Operating bit rate range from 19 to 26 Gbps (Option CR25)•

Operating bit rate range from 25.3 to 32 Gbps (Option CR28)•Clock output frequency at full, half and quarter of the nominal input data bit rate

1
1

Optical Receiver•

Broadband operation up to 32 Gbps•

Wide output dynamic range•

Limiting behaviour•

Differential outputs•

Unsurpassed high power handling capabilityOptions•Option OE: With optical/electrical converter

1•Option CR25: With clock recovery 19 to 26 Gbps

•Option CR28: With clock recovery 25.3 to 32 Gbps

Not available at the same time

SHF reserves the right to change specifications and design without notice – SHF 41211C v001 – 22.06.2010

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Block Diagram
Optical Receiver

OpticalInput

Differentialoutput

Clock Recovery

DataInput

Clock Recovery
Module(full Bitrate)(Bitrate /2)

ClockOutput(Bitrate / 4)

Reference
Clock

Bert Control Center

SHF reserves the right to change specifications and design without notice – SHF 41211C v001 – 22.06.2010

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Specifications – SHF 41211C
Option CR28/CR25 – Clock recovery
Parameter

Unit

Min.

Typ.

Max.

Comment

Data InputOperating bit rate
CR25CR28Gbps

Input Voltage

mVConnector

Ω19.0
25.3

26.0
32.0

200

1000
ruggedized 2.92mm male50

Clock / 4 Output (quarter bit rate)
Output Frequency
CR25CR28GHz

Output Voltage (Vpp)mVConnectorΩ

RMS-Jitter

fs

4.75
6.33

6.5
8.0

500

800
SMA - female

50
1000

Clock / 2 Output (half bit rate)
Output Frequency
CR25CR28

GHz

Output Voltage (Vpp)mVConnectorΩ

RMS-Jitter

29.50
12.65

1316500

800
SMA - female

50

fs800

Full Clock Output (full bit rate)
Output Frequency
CR25CR28

GHzOutput Voltage (Vpp)mVConnectorΩ

RMS-Jitter
CR25CR282219.0
25.3

2632500

800
ruggedized 2.92 male50fs600
800

on scope display, measured with Agilent 86100A with precision time base

SHF reserves the right to change specifications and design without notice – SHF 41211C v001 – 22.06.2010

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Option OE – Optical receiverParameterUnitMin.

Wavelength range
GHzLow frequency 3dB point

kHzComment

2030

Conversion gain

mV/mW

Receiver sensitivity

dBm

tbd

V0.8

Rise/fall timespstbd

Optical input powerdBm

Data Out ConnectorsΩ

Optical Connector

Max.

C and L band

High frequency 3dB point

Output saturation(peak-peak)

3Typ.

voltage

3200

25050

at 1550 nm

1Pin > +3 dBm (NRZ)

13CW
ruggedized
2.92mm male

FC/PC

Consult SHF for other requests

SHF reserves the right to change specifications and design without notice – SHF 41211C v001 – 22.06.2010

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