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 78210 B
Synthesized Signal Generator

SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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Description
The Synthesized Signal Generator SHF 78210 B was developed to provide our BERT system customers
with a suitable internal clock source for their 100G Ethernet test applications, at reasonable cost. With afrequency range from 10 GHz to 38 GHz all bit rates of interest are covered. The output power can bevaried between -3 dBm and +4 dBm in 0.1 dB steps.
For trigger purposes, the SHF 78210 B provides a trigger signal at a quarter or half of the RF output
frequency.
Optionally, jitter injection functionality can be added to the signal generator module. Arbitrary jitter types
may be applied to the clock signal using an external signal source, enabling various test scenarios such asserial data protocol compliance testing.

Block Diagram
SHF 78210 BSynthesizer Module
Trigger Out

fCLK /N

External Modulation

fCLKRF Out
fCLK = 10 to 38 GHz

Tunable DelayLine (optional)

ControllerFeatures

Output clock frequency ranges from fCLK = 10 to 38 GHz

Output power adjustable from -3 to +4 dBm in 0.1 dB steps with an accuracy better than 0.1 dB

Computer controlledIntegrates seamlessly in the SHF BERT system hardware and software environmentOperated using the BERT Control Center GUI running on a PC

SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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Options
Option J1: Jitter Injection
Enables injection of arbitrary jitter types by applying an external modulation signal up to 1 GHz
bandwidth with a maximum jitter amplitude of 90 ps peak-to-peak. A jitter-free trigger signal isavailable for measurement and calibration purposes.

Option T2 or T4: Trigger Frequency, refer to Table 1
The trigger signal is derived from the clock signal whose frequency is divided by an integer N
depending on the chosen trigger option and the frequency range. Refer to Table 1 to determine thevalue of N.
Note that the trigger remains jitter-free even if jitter injection is enabled.

Table 1: Value of the trigger frequency divider N
Clock Frequency
Range

Option T2Option T410 – 18.75 GHz

N=1

N=218.75 – 38 GHz

N=2

N=4Specifications – SHF 78210 B
Parameter

Unit

Min.

Operating Frequency

GHz

10Frequency Resolution

MHzOutput Power Level

dBm

Spurious Signals

dBc

SSB Phase NoisedBc/HzIntrinsic Jitter (RMS)

fsTyp.

Max.

Comment38

fCLK+41.85 mm (V) male

Clock Output (RF Out)

1-3-20tbd
400

Scope measurement notdeconvoluted

Trigger Out
Frequency (Option T2)

GHz

1016

Refer to Table 1

Frequency (Option T4)

GHz58

Refer to Table 1

Output Amplitude

mVpp

300

650

SMA female

Modulation Bandwidth

MHz0.11000

External Modulation
Amplitude

mVpp

01000

SMA female

ps090

Peak-to-peak

Jitter Injection (Option J1)

Jitter Amplitude

SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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General
Weightkg

3.3

Dimensions

mm59x213x450

Power Consumption

W12

Operating Temperature°C

10w/o Front PanelConnector
35

Graphical User Interface

Typical Output Signal Waveforms
Clock Signal at fCLK = 28 GHz

Pout = 0 dBm

Pout = +4 dBm

SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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Clock Signal at fCLK = 32 GHz

Pout = 0 dBm

Pout = +4 dBm

Jitter Injection Option
The SHF 78210 B jitter injection feature is designed to apply arbitrary jitter modulation to the high-speed
clock signal. Jitter is injected by connecting a signal source such as an arbitrary waveform generator to theexternal modulation input. Internally, the time delay of a tunable delay line is modulated. The maximum
jitter amplitude is 90 ps peak-to-peak with a modulation bandwidth of up to 1 GHz. As an example, thejitter amplitude of 90 ps corresponds to a relative jitter amplitude of 2.5 unit intervals (UI) at a bitrate of28 Gbit/s.
The specifications of the external signal source are given in the table below for sinusoidal jitter injection.
Depending on the user’s jitter injection requirements, an arbitrary waveform generator may be used formaximum flexibility of the available jitter types. Several examples of jittered clock waveforms using anarbitrary waveform generator are shown in the next section.

Recommended Minimum Specifications of the External Signal Source Required for Injection ofSinusoidal Jitter
Parameter

UnitMin.

Frequency Range

MHz

0.1

1000

Amplitude

mVpp

01000

Connector Type

Typ.

Max.

SMA

For jitter calibration purposes, the trigger signal of the SHF 78210 B remains jitter-free even if jitter
injection is applied to the RF out signal.
In combination with the SHF bit pattern generator series 1210X A, the SHF 78210 B including the jitter
injection feature enables a complete test solution for jitter tolerance tests as required by many
telecommunication standards such as 100G Ethernet and 40 GBit/s OTN, FibreChannel, InfiniBand,PCI Express®, and Serial ATA. For further details please refer to the SHF application note „Jitter Injection
using the Multi- Channel BPG“, available online at www.shf.de.
 InfiniBand is a registered trademark of the InfiniBand Trade Association. PCI Express is a registeredtrademark of Peripheral Component Interconnect Special Interest Group (PCI-SIG).
SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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Typical Jittered Signal Waveforms
The external modulation input can be driven by a function generator such as the Agilent 332XX family offunction / arbitrary waveform generators (AWG). The waveform characteristics of the AWG determine the jitter
type of the SHF 78210 B.

Sine Wave on Modulation Input

AWG Setting
Waveform
Frequency
Amplitude

Sine wave
100 kHz
70 mVpp

Sinusoidal jitter on 28 GHz clock,jitter amplitude 11 ps peak-to-peak

Gaussian-Distributed Noise on Modulation Input

AWG Setting
Waveform
Amplitude

Noise70 mVpp

Random jitter on 28 GHz clock,jitter amplitude 1.7 ps rms

SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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Square Waveform on Modulation Input

AWG Setting
Waveform
Frequency
Amplitude

Square100 kHz
70 mVpp

Peak-to-peak jitter on 28 GHz clock,jitter amplitude 11 ps peak-to-peak

As an example, the following diagram shows the peak-to-peak jitter amplitude in ps versus the modulation
signal amplitude in mVpp for the special case of sinusoidal jitter of 100 kHz frequency modulated onto a28 GHz clock using a function generator of the Agilent 332XX family. Note the hatched area which indicates arelative jitter amplitude of more than 1 UI (~36 ps). The jitter measurement in this case was limited by thesampling oscilloscope which shows a completely closed eye for jitter amplitudes larger than 1 UI.

Sinusoidal Jitter Amplitude
Peak-to-Peak Jitter Amplitude [ps]Jitter Frequency 100 kHz, Clock Frequency 28 GHz50

28 Gbit/s eye
completely closeddue to jitter454035302520151050050

100
150
200250Modulation Signal Amplitude [mVpp]

300

350

SHF reserves the right to change specifications and design without notice – SHF 78210 B - V003 – 7th Sept. 2012

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