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 78121 A
Clock Distribution

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Description
The SHF 78121 A is a versatile broad band clock distribution unit providing copies of the incoming clock at
different divider ratios.

Features

Broad band operation from 3 to 56 GHz
Multiple clock outputs at different divider ratios
Optional frequency doubler up to 64 GHz
Optional frequency divider up to 64 GHz
Controlled by intuitive graphical user interface BERT Control Center (BCC)

Options
Option Doubler
The optional frequency doubler provides a high speed clock signal of 50 GHz to 64 GHz from a 25 GHz to32 GHz clock signal
Option Divider
The optional frequency divider provides a high speed clock signal of 12.5 GHz to 32 GHz from a 25 GHz
to 64 GHz clock signal

Block Diagram
F/H Clk OutOptionDoubler

OptionDivider

Clk x2 Out

DIV Outx2/2

Clk InDIV InSHF 78121 A
Clock Distribution

SEL/N/2

Selectable
Clk Out

Clk/2 Out

Clk Out

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Specifications – SHF 78121 A
Parameter

Symbol

Unit

Min.

Typ.

Max.

Comment

Clock Distribution
Connector TypeClock Inruggedized 1.85 mm (V)male connector
ruggedized 1.85 mm (V)male connector
ruggedized 2.92 mm (K)male connector
ruggedized 2.92 mm (K)male connector
ruggedized 2.92 mm (K)male connector

Clock OutΩClock/2 Out50F/H Clock OutSelectable Clock Out
Minimum Input Frequency

fin_clockGHz

Maximum Input Frequency

fin_clockGHz56

fout_clock

GHzGHzGHzGHzGHz

10.5
0.5
0.50.001

56
28
33281428

same as input frequency
half of input frequency
full of input frequency
half of input frequency
input frequency / N(N= 4, 8, 16, 32, 64, 128,256, 512, 1024)

Vin_clock

mVpp

600

1000

AC coupled

1000
1000
800
800
800

AC coupled, @ Pin=0 dBm
AC coupled
AC coupled
AC coupled
AC coupled

Output Frequency
Clock OutClock/2 Out
F/H Clock Out (Full Mode)
F/H Clock Out (Half Mode)
Selectable Clock Out

Input Voltage
Output Voltage
Clock OutClock/2 Out
F/H Clock Out (Full Mode)
F/H Clock Out (Half Mode)
Selectable Clock Out

Vout_clockmVpp

3500500300300
400700800500500600

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Parameter

Symbol

Unit

Min.

Typ.

Max.

Comment

Option Frequency Doubler
Connector TypeClock x2 OutΩ50

ruggedized 1.85 mm (V)male connector

Minimum Input Frequency

findbl_min

GHz25

Maximum Input Frequency

findlb_maxGHz

Minimum Output
Frequency

foutdbl_min

GHz

Maximum Output
Frequency

foutdbl_max

GHz

64

Output Amplitude

Vout_dbl

mVpp

400

800

1300

Parameter

Symbol

Unit

Min.

Typ.

Max.

32
50

AC coupled

Comment

Option Frequency DividerConnector TypeDIV InΩ

ruggedized 1.85 mm (V)male connector
ruggedized 2.92 mm (K)male connector50

DIV Out
Minimum Input Frequency

findiv_min

GHz

27

Maximum Input Frequency

findiv_max

GHz

Minimum Output
Frequency

foutdiv_min

GHzMaximum Output
Frequency

foutdiv_max

GHz

32

Input Amplitude

Vin_divmVpp

400

Output AmplitudeVout_div

mVpp

400

ParameterSymbol

Unit

Min.

Power Supply Voltage

V100

Power Consumption

W

19.5

WeightKg

3.5

Dimensionsmm

Operating Temperature°C

1035

Storage Temperature°C-2070

Network Connection

Mbps

64
13.5

800

AC coupled

600

800

AC coupled

Typ.

Max.

CommentGeneral
240
Incl. Option Doubler &Option Divider
235 x 110 x 355

10/100

Ambient temperature
Ethernet, RJ-45

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Typical Output Waveforms – Clock Distribution

Clock Out 56 GHz @ fin= 56 GHzClock/2 Out 28 GHz @ fin= 56 GHz

Clock Out 32 GHz @ fin= 32 GHz

Clock/2 Out 16 GHz @ fin= 32 GHz

Clock Out 3 GHz @ fin= 3 GHz

Clock/2 Out 1.5 GHz @ fin= 3 GHz

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Selectable Clock /4 Out  14 GHz @ fin= 56 GHz

Selectable Clock /8 Out  7 GHz @ fin= 56 GHz

Selectable Clock /16 Out 3.5 GHz @ fin= 56 GHz

Selectable Clock /32 Out 1.8 GHz @ fin= 56 GHz

Selectable Clock /64 Out 0.9 GHz @ fin= 56 GHzSelectable Clock /1024 Out 55 MHz @ fin= 56 GHz

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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F/H Clk Out (Full Mode) 33 GHz @ fin= 33 GHz

F/H Clk Out (Half Mode) 28 GHz @ fin= 56 GHz

F/H Clk Out (Full Mode) 16 GHz @ fin= 16 GHz

F/H Clk Out (Half Mode) 16 GHz @ fin= 32 GHz

F/H Clk Out (Full Mode) 0.5 GHz @ fin= 0.5 GHz

F/H Clk Out (Half Mode) 0.5 GHz @ fin= 1 GHz

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Typical Output Waveforms – Option Doubler

Clock x2 Out 68 GHz @ fin= 34 GHz

Clock x2 Out 64 GHz @ fin= 32 GHz

Clock x2 Out 60 GHz @ fin= 30 GHz

Clock x2 Out 56 GHz @ fin= 28 GHz

Clock x2 Out 50 GHz @ fin= 25 GHz

Clock x2 Out 46 GHz @ fin= 23 GHz

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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Typical Output Waveforms – Option Divider

DIV Out 33 GHz @ fin= 66 GHz

DIV Out 32 GHz @ fin= 64 GHz

DIV Out 28 GHz @ fin= 56 GHz

DIV Out 21.5 GHz @ fin= 43 GHz

DIV Out 16 GHz @ fin= 32 GHzDIV Out 13.5 GHz @ fin= 27 GHz

SHF reserves the right to change specifications and design without notice – SHF 78121 A - V001 – May 10, 2016

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