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 614 B
60 GBaud 6-Bit DAC

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 1/14

Description
The SHF 614 B is a 6-Bit Digital-to-Analog Converter (DAC) operating at symbol rates up to 60 GBaud
for use in broadband test setups and telecom transmission systems. Up to six single ended serial data
streams are accepted by the DAC and converted into one differential 64-level data signal. By using lessthan six input ports it is possible to generate 2-level NRZ as well as 4, 8, 16 or 32-level output signals.
With a programmable SHF BPG (e.g. SHF 12104 A) you have full control of the patterns into the DAC.
Therefore our BPG/DAC combination can be seen as a full blown remote head non-interleaved 60
GBaud Arbitrary Waveform Generator (AWG).
A single ended clock signal with the same frequency as the data rate is required to drive the SHF 614
B. For data regeneration purposes all input data signals are re-sampled to mitigate any signal
impairments resulting e.g. from long cables. Therefore, it becomes possible to place the DAC very
close to the DUT. Clock input port and data output ports are AC-coupled. Data input ports are DCcoupled.

Features






Broadband operation up to 60 GBaud
Output baud rate = sample rate
Differential data output, 3.0 V differential output swing (1.5 V in single-ended operation)
Single ended clock and data inputs
Latched input ports
Output amplitude & input threshold level control (remote by software)

Applications
100, 200, 400 Gbps and 1 Tbps system evaluation & development
Broadband test and measurement equipment
PAM-N, OFDM, Advanced Modulation Experiments

Options
Option Case:

DAC module, power supplies, cooling measures and 1.85 mm panel adaptors
are housed in a small benchtop case.

Block Diagram
OutOutSHF
614 B

6-Bit DAC

USB/CTRL

D5(MSB)D4 D3 Clk D2

D1 D0(LSB)

PowerSupply

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 2/14

Module Variants
In addition to the DAC itself, the power supplies, USB cable and heat sink are complementary parts ofeach delivery. It is recommended to use the DAC only with the delivered power supply module. Theheat sink can be removed by the customer. In this case it is required to provide other coolingmeasures to ensure that the maximum case temperature specified on page 6 will not be exceeded.

SHF 614 B

With Option Case the SHF 614 B DAC module, the power supplies, cooling measures and the MiniSMP to 1.85 mm panel adaptors are housed in a small benchtop case that can be easily embedded in
the customer’s test environment.

SHF 614 B – incl. Opt. CaseSHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 3/14

Ease of Use
The easy to use software package, SHF 600 Series Control is the most convenient way to control the DAC.
The software reads the individual calibration tables of the DAC and sets the contribution of the bias
voltages accordingly. The amplitude of the individual eye openings can be set and is displayed in thegraphical user interface (GUI) as well as the input threshold level for the DC-coupled data inputs. Thisenables the user to generate a perfect signal just by a few intuitive clicks. The control software for otheroperating systems is available on request.

Fig. 2: “SHF 600 Series Control” – GUISHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 4/14

Absolute Maximum Ratings
Parameter

Unit

SymbolMin.

Typ.

Max.

Comment

Data Input Voltage

mV

Vdata in900

Peak-to-Peak

Clock Input Voltage

mVVclk in

900

Peak-to-Peak

External DC Voltage on
RF Clock Input PortVVDCin-10+10AC coupled input

External DC Voltage on
RF Data Input Ports

VVDCin-0.50

DC coupled inputs

External DC Voltage on
RF Output PortsV

VDCout-10+10AC coupled outputs

DC Supply Voltage

V

Vcc

Unit

SymbolMin. Input Data Rate

Gbps

Rin,minMax. Input Data Rate

Gbps

Rin,max

60

Data Input Voltage

mV

Vdata in

300

800

Eye Amplitude;
500 mV recommendedExternal DC Voltage on
RF Data Input Ports

VVDCin-0.50

DC coupled inputs

Min. Clock Input Frequency

GHzfin,min

Max. Clock Input Frequency

GHzfin,max

60

Clock Input Voltage

mVVclk in

300

800

Peak-to-Peak;
500 mV recommended

External DC Voltage on
RF Clock Input PortV

VDCin-10+10AC coupled input

Input Parameters

13.0

Specifications
Parameter

Min.

Typ.

Max.

Comment

Input Parameters
11

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 5/14

Parameter

UnitSymbol

Min. Output Data Rate

GBaudRout,minMax. Output Data Rate

GBaudRout,maxMin.

Typ.

Max.

Comment

Output Parameters

Output Voltage

mVVoutRise / Fall Time

pstr / tf

Equivalent Output Bandwidth

GHzBW

Differential Output Skew

pstskew

160

1300

1512

8.2

22

Eye Amplitude;
Single ended;
Full scale;
Adjustable up to -6 dB
 see page 71020%...80%;
1deconvolved
Derived from Rise Time
2using formula ;-3 dB bandwidth

27±1±2+12+12.5

Power Requirements (without Option Case)
Supply Voltage

VVc

Supply Current

mAIc

1150

Power Dissipation

WPd

13.8+11.5

2.1 mm DC Power Jack

@ VC = +12V

Power Requirements (with Option Case)
Supply Voltage

VVc

Supply Current

mA

Power Dissipation+11.5+12+12.5

2.1 mm DC Power Jack

Ic

1350

1450

W

Pd

16.2

17.4

@ VC = +12V°C

Tcase

45

without Option Case

Conditions
Module Temperature

3101

Calculation based on typical rise / fall times from oscilloscope data sheet: 𝑡𝑟 𝑑𝑒𝑐𝑜𝑛𝑣𝑜𝑙𝑣𝑒𝑑 = √(𝑡𝑟 𝑚𝑒𝑎𝑠𝑢𝑟𝑒𝑑 )2 − (𝑡𝑟 𝑜𝑠𝑐𝑖𝑙𝑙𝑜𝑠𝑐𝑜𝑝𝑒 )2 = √(𝑡𝑟 𝑚𝑒𝑎𝑠. )2 − (3.68 𝑝𝑠)22

Calculation based on formula: 𝐵𝑊 =30,22
𝑇𝑟

tr / tf of the output data signal can be slightly decreased by applying additional cooling measures like heat sinks or cooling fans.

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 6/14

Typical Output Amplitudes
Below mentioned values assume no attenuation to be set in the control software. The output amplitudeof the DAC can be reduced by 0 to 6 dB by making the appropriate setting in the control software.

Input D5

Input D4

Input D3

Input D2

Input D1Input D0

Typical Output
Amplitude [mV]

-----

On

24-

---

On-

48-

--

On-

-

96

-

-

On-

--

192

-

On-

---

384

On-

---

-

768

The typical output amplitude of a multilevel signal can be calculated by accumulating the typical output
amplitudes of all applied input ports of the DAC as shown in the table above. Thus the full scale output
swing (all inputs active) accumulates as follows:
OnOn

OnOn

On

On

1512

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 7/14

Typical Output Eye Diagrams
31

The measurements below had been performed using a SHF 12104 A Bit Pattern Generator (PRBS 2 1) and a Tektronix DSA 8300 Digital Serial Analyzer (DSA) with Phase Reference Module (82A04B60G) and 70 GHz Sampling Module (80E11). The outputs of the DAC module had been connected
directly to the DSA input with a 10 dB attenuator.

4-Level Output Signal Measurement

Out @ 64 GBaud

Out @ 60 GBaud

Out @ 56 GBaud

Out @ 43 GBaud

Out @ 32 GBaud

Out @ 10 GBaudSHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 8/14

8-Level Output Signal Measurement

Out @ 60 GBaud

Out @ 56 GBaud

Out @ 43 GBaud

Out @ 32 GBaud

Out @ 10 GBaud

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 9/14

16-Level Output Signal Measurement

Out @ 43 GBaud

Out @ 32 GBaud

Out @ 20 GBaud

Out @ 10 GBaud

32-Level Output Signal Measurement

Out @ 10 GBaud

Out @ 2 GBaud

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 10/14

Arbitrary Waveform Generation (4-Bit Mode)

Sine @ 60 GBaud

Saw @ 60 GBaud

Triangle @ 60 GBaud

Stepped Eye @ 60 GBaud“SHF”- writing @ 60 GBaud

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 11/14

Outline Drawing - Module
Power LED

4x M2,5x5mm

Power Supply

Control

4394
536

131294

3x3.6
36.6
53.2
62.6

GNDOut1.85mm (V) female

4blackGNDD0MiniSMP (GPPO) Male

5greyVee

D1

MiniSMP (GPPO) Male

6pink

GND

D2

MiniSMP (GPPO) Male

D3

MiniSMP (GPPO) Male

D4

MiniSMP (GPPO) Male

PinColour

D5

MiniSMP (GPPO) Male

1brownSCLClkMiniSMP (GPPO) Male

3blue

GND

Clk

MiniSMP (GPPO) Male

4

black

SDA

Control (I2C-Bus)
Designation

CTRL

blueOut

3

D145

1.85mm (V) female

D2
D1
D0nc

Vcc

OutOut

white

Clk
Clk

26-Bit DAC

Connector

Power
SupplyVee

Port

Communication
Technologies AG

Voltagebrown

SHFColour

145.2

PinAll dimensions in mm.

3x3.656.846.8

Power Supply

SHF 614 B

12.4
45.2

nc
D5
D4
D366.36.4

2112.53.62387100

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 12/14

Outline Drawing – Module with Heat Sink
Power LEDOut

Power Supply

Control

445Out361312

Power Supply
PinColour

Voltage1brownVee

Power
Supply

nc
D5
D4
D3Clk
Clk

D2
D1
D0nc

CTRL

SHF

OutOutCommunication
Technologies AG6-Bit DAC

SHF 614 B

D145

PortConnector2whiteVcc

Out1.85mm (V) female

3blue

GND

Out

1.85mm (V) female

4blackGND

D0MiniSMP (GPPO) Male5greyVee

D1MiniSMP (GPPO) Male

6pink

GND

D2MiniSMP (GPPO) Male

D3

MiniSMP (GPPO) Male

D4

MiniSMP (GPPO) MalePinColour

D5

MiniSMP (GPPO) Male

1brownSCLClkMiniSMP (GPPO) Male

3

blue

GND

Clk

MiniSMP (GPPO) Male

4

blackSDA

Control (I2C-Bus)
Designation

43.2
53.2

121

All dimensions in mm.

3x3.6 3.6 3x3.6

1326.6
43.2
52.6

SHF

14.7

D3D4
D5nc

ClkClkPower Supplync
D0D1D214.68.5

CTRL

Communication
Technologies AG

D145

SHF 614 B 6-Bit DAC

12.4645.2

77100

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 13/14

50.8

Outline Drawing – SHF 614 B with Option Case

221.4
d6 x 15mm
1528.635 67 89177

47.2

55.4

2

18.985.2

1028.5cbPos.
12345678Designation
Data Out
Data OutClock In
D0D1
D2D3D4Connector
1.85mm (V) Female
1.85mm (V) Female
1.85mm (V) Female
1.85mm (V) Female
1.85mm (V) Female
1.85mm (V) Female
1.85mm (V) Female
1.85mm (V) Female

9D5

1.85mm (V) FemaleaPos.
abcdDesignation
GND
Power SupplyUSBGND

SHF reserves the right to change specifications and design without notice - SHF 614 B - V002 – December 13, 2017 Page 14/14