SHF Communication Technologies AGWilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772 051-0 • Fax +49 30 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF EQ16 ABroadband Linear Equalization Filter

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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Description
The SHF EQ16 A is a RoHS compliant passive broadband linear equalizationing filter with a small formfactor. It is designed to compensate for linearly increasing insertion loss in the signal transmission path.
The Nyquist frequency of the filter has been chosen to be around 16 GHz, covering signal baud rate in theregion of 25 to 32 Gbaud. Typical applications include compensation for distortions due to the loss of
bandwidth of a DUT, and additional insertion loss due to the inclusion of RF cable(s) in the signal path.
This filter is suitable for both NRZ and PAM4 data formats in the region of 25 to 32 GBaud.
The filter has a DC coupled transmission path. So it can transfer a DC voltage for the DUT. The
compensation path to GND is AC coupled. Due to this fact, the compensation operates down to ~ 50 kHz,capable of handling data sequence length of up to 2^31-1 PRBS.

Available Configurations
1.5 dB



3 dB1

6 dB

11Specifications - SHF EQ16 A
Parameter

UnitSymbol

Min

TypMaxMaximum RF Input

dBm
V

Pin max

DC Voltage at RF Input

V±12

DC Voltage at RF Output

V±12

DC Current

A

0.5

Case Temperature

Tcase

Conditions

Absolute Maximum Ratings°C15
3.5

1025

peak to peak voltage

60

Mechanical Characteristics
Input Connector

1.85mm (V) female2Output Connector

1.85mm (V) male2

12

Defined as the filter peaking value from low to the Nyquist frequency of 16 GHz.
Other gender configurations are available on request.

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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Specifications - SHF EQ16 A Option 1.5 dB
Parameter

Unit

SymbolMin

TypMax

Conditions

Electrical Characteristics (At 25°C case temperature, unless otherwise specified)Insertion LossdB

S21 LOW

2.42.8at 1 GHz

Insertion LossdB

S21 PEAK

0.8

1.4

at 16 GHzInsertion LossdB

S21 HIGH

0.51.4

16 … 32 GHz

Input Reflection

dBS11-9-1040 MHz … 16 GHz

Output ReflectiondB

S22-9-1040 MHz … 16 GHz

16 GHz … 40 GHz

16 GHz … 40 GHz

Specifications - SHF EQ16 A Option 3 dB
Parameter

Unit

SymbolMin

TypMax

Conditions

Electrical Characteristics (At 25°C case temperature, unless otherwise specified)Insertion LossdB

S21 LOW

3.8

4.2

at 1 GHz

Insertion LossdB

S21 PEAK

0.81.4at 16 GHz

Insertion LossdB

S21 HIGH

0.51.4

16 … 32 GHz

Input ReflectiondB

S11-7-1040 MHz … 16 GHz

Output Reflection

dBS22-7-1040 MHz … 16 GHz

16 GHz … 40 GHz

16 GHz … 40 GHz

Specifications - SHF EQ16 A Option 6 dB
Parameter

Unit

SymbolMin

TypMax

Conditions

Electrical Characteristics (At 25°C case temperature, unless otherwise specified)Insertion LossdB

S21 LOW

6.06.8at 1 GHz

Insertion LossdB

S21 PEAK

0.8

1.4

at 16 GHz

Insertion LossdB

S21 HIGH

0.5

1.4

16 … 32 GHz

Input ReflectiondB

S11-4-1040 MHz … 16 GHz

Output ReflectiondB

S22-4-1040 MHz … 16 GHz

16 GHz … 40 GHz16 GHz … 40 GHz

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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Typical S-Parameters and Phase Response
blue: EQ16 A-1.5 dB
red:
EQ16 A-3 dB
green: EQ16 A-6 dB

Low Frequency Response < 100 kHz(no DC on Input)

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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Binary Eye Diagrams with EQ16 A-1.5 dB
Example to show compensation for ~ 1.5 dB transmission loss at Nyquist frequency. DUT is 1 m Totoku
TCF280QR with typical insertion loss of 1.8 dB at 16 GHz.
All measurements had been performed using a SHF611 C DAC in binary mode and an Agilent 86100C
DCA with Precision Time Base Module (86107A) and 70 GHz Sampling Head (86118A).

25 Gbps without cable

32 Gbps without cable

25 Gbps with 1 m TCF280QR

32 Gbps with 1 m TCF280QR

25 Gbps with 1 m TCF280QR and EQ16 A-1.5 dB

32 Gbps with 1 m TCF280QR and EQ16 A-1.5 dB

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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4-Level Eye Diagrams with EQ16 A-1.5 dB
All measurements had been performed using a SHF611 C DAC and an Agilent 86100C DCA with Precision
Time Base Module (86107A) and 70 GHz Sampling Head (86118A).

25 GBaud without cable

32 GBaud without cable

25 GBaud with 1 m Totoku TCF280QR

32 GBaud with 1 m Totoku TCF280QR

25 GBaud with 1 m TCF280QR and EQ16 A-1.5 dB

32 GBaud with 1 m TCF280QR and EQ16 A-1.5 dB

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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Frequency Response of 1 m cable and EQ16 A-1.5 dB

blue: EQ16 A-1.5 dB
red:
1 m cablegreen: 1 m cable and EQ16 A-1.5 dB

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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9.5

Mechanical Drawing

2x M2 x 5 mm

8.75

17.5

1.5 dB21

PIN :<15 dBm

12.36

12.5

SHF EQ16 A
47890

12.35
17.5

4.73

5.6

all dimensions in mm
Input connector: 1.85mm (V) female
Ouput connector: 1.85mm (V) male

SHF reserves the right to change specifications and design without notice – SHF EQ16 A - V001 – Dec. 11, 2017

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