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 41210BClock Recovery
Optical ReceiverDescription
The SHF 41210B is an optical receiver and clock recovery unit. This plug-in module is part of theSHF modular measurement series and needs to be installed in a mainframe type SHF 10001A orSHF 10000B. Together with other plug-in modules from this instrument series, a modular andscalable measurement system can be configured. Field installation or upgrade by the end-user ispossible for this part of equipment.
It can be specified as just a receiver (option OE), or just clock recovery (option CR) or with bothoptions. Both options are separate building blocks, they are connected internally!
The optical receiver converts optical signals with a bit rate up to 50 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. Itoperates at bit rates from 39.8 to 43.1 Gbps.
It uses two separate VCOs which allow operation in two bands. The lower band spans the range
between 39.8 and 41.6 Gbps and the higher band spans the range between 41.6 and 43.1 Gbps.
Due to the circuit concept a reference clock with a frequency of bit rate divided by either 64, 32 or
16 must be applied to the unit. For better convenience reference oscillators for three standard bit
rates (39.813 Gbps, 42.656 Gbps and 43.018 Gbps) are built-in.
The clock recovery also operates at data rates around 20 and 10 Gbps (½ and ¼ of the nominal bitrate). However, the clock output will give a signal proportional to the nominal bit rate.
The SHF 11120C 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.

FeaturesOptical Receiver
Broadband operation up to 50 Gbps
High optical sensitivity
Wide output dynamic range
High output saturation suitable for 2R regenerationExcellent pulse behavior
Unsurpassed high power handling capability
High responsivity
Clock Recovery
Operating bit rate range from 39.8 to 43.1 Gbps (this includes OC-768 with and without FEC)
Clock output frequency at half and quarter of the nominal input data bit rate
Excellent input sensitivity of 50 mV

Options
Option OE: With optical/electrical converter
Option CR: With clock recovery
Option C40: Full clock output
SHF 41210B – V002 – 17/April/2007

SHF reserves the right to change specifications and design without notice

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Block Diagram
Optical ReceiverOpticalInput

Electrical
Data Output

PDClock Recovery

DataInput
Ref.
Input

(full Bitrate)

Clock Recovery
Module(Bitrate /2)(Bitrate /4)

ClockOutput

622.08MHz
666.51MHz
672.16MHz

Bert Control Center

Specifications – SHF 41210B
Option CR – Clock recovery
Parameter

Unit

Min.

Typ.

Max.

Comment

Data Input
Operating bit rate
VCO1
VCO2

Gbps

Input Voltage

mVConnectorΩ

50

Return loss

dB

8

39.8
41.6

41.6
43.1

50

800
ruggedized V-male

Reference Clock Input
Input Frequency(Bit Rate / 64 mode)(Bit Rate / 32 mode)(Bit Rate / 16 mode)GHz

Input Voltage

mVppConnectorΩSHF 41210B – V002 – 17/April/2007

0.622
1.244
2.488

0.674
1.348
2.696

400

80050

SMA-female

SHF reserves the right to change specifications and design without notice

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Parameter

Unit

Min.

Typ.

Max.

CommentInternal Reference Clock
Clock 1MHz622.080

39.81312 Gbps

Clock 2

MHz666.514

42.65692 Gbps

Clock 3

MHz672.163

43.01841 Gbps

Clock /4 Output (quarter bit rate)
Output Frequency

GHz9.95

10.775

Output Voltage

mVpp400600
SMA- female

ConnectorΩ50

RMS-Jitter

fs550

700

Note 1Half Clock Output (half bit rate)
Output Frequency

GHz

19.9

21.55

Output Voltage

mVpp5001000
ruggedized K-maleConnectorΩ50

RMS-Jitter

fs450600

Note 1

Full Clock Output (optional, full bit rate)
Output Frequency

GHz

39.8

43.1

Output Voltage

mVpp

500

1000
ruggedized V-maleConnectorΩ50

RMS-Jitter

fs450600

Note 1

Note 1 – on scope display, measured with Agilent 86100A with precision time base

Option OE – Optical receiverParameter

Unit

Min.

Wavelength range

Typ.

Max.

CommentC and L band

High frequency 3dB point

GHzLow frequency 3dB point

kHz30
30Conversion gain

mV/mW

Receiver sensitivitydBm-9

Output saturation voltage(peak-peak)

V56Rise/fall times

ps91010…90%

Optical input power

dBm

13CW

Data Out ConnectorΩ

Optical Connector

350

45050FC/PC

at 1550 nm

ruggedized V-male
Note 2

Note 2 – Consult SHF for other requests

SHF 41210B – V002 – 17/April/2007

SHF reserves the right to change specifications and design without notice

Page 4/8

Test Results
Option CR – Clock recovery

Test Results @39.813 Gbps with Internal Reference 1 (622.08 MHz)

Data In @ 39.813 Gbps

Clk/4 Out @ 39.813 Gbps

Clk/2 Out @ 39.813 Gbps

Clk Out @ 39.813 Gbps

SHF 41210B – V002 – 17/April/2007

SHF reserves the right to change specifications and design without notice

Page 5/8

Test Results @42.656 Gbps with Internal Reference 2 (655.514 MHz)

Data In @ 42.656 Gbps

Clk/4 Out @ 42.656 Gbps

Clk/2 Out @ 42.656 Gbps

Clk Out @ 42.656 Gbps

SHF 41210B – V002 – 17/April/2007

SHF reserves the right to change specifications and design without notice

Page 6/8

Test Results @43.018 Gbps with Internal Reference 1 (672.163 MHz)

Data In @ 43.018 Gbps

Clk/4 Out @ 43.018 Gbps

Clk/2 Out @ 43.018 Gbps

Clk Out @ 43.018 Gbps

SHF 41210B – V002 – 17/April/2007

SHF reserves the right to change specifications and design without notice

Page 7/8

Test Results
Option OE – Optical receiver

40 Gbps electrical output signal with6dBm optical input power

SHF 41210B – V002 – 17/April/2007

Sensitivity measurement

SHF reserves the right to change specifications and design without notice

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