COHERENT SIGNAL ANALYSISSOFTWARES P EC I F I C AT I O N S H E E T

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Introducing VISIQ™, the brand new coherent opticalsignal analysis software designed for today’s pioneering
optical engineers.
VISIQ is designed to make coherent signal analysis and DSP optimization as simple as possible. It features an intuitiveuser-interface that reduces the learning curve for new users, while still providing the ability for advanced users to fully
customize the signal processing algorithms.
VISIQ is the first software platform to enable coherent signal analysis on high-performance real-time oscilloscopesfrom the three leading oscilloscope manufacturers.

Extend the functionality and ROI of existing hardware
VISIQ is scope agnostic and can be used with popular real-time oscilloscopes providing a cost-effective upgrade forexisting test hardware.
Compatible oscilloscopes include:•

Keysight Infiniium UXR-Series real-time oscilloscopes•

Keysight Infiniium V-Series real-time oscilloscopes•

Tektronix SX series real-time oscilloscopes•

Tektronix DX series real-time oscilloscopes•TeledyneLeCroy LabMaster 10Zi real-time oscilloscopes•TeledyneLeCroy LabMaster 9Zi real-time oscilloscopes

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K E Y F E AT U R E S

Easy-to-use, intuitive GUI

Powerful adaptive equalizers

The modern user interface provides an intuitive
presentation of the configuration and analysis
workflow to make the coherent DSP simple tounderstand and use.

The advanced equalizer algorithm can be set to trainover multiple iterations to test the boundaries of DSP
signal optimization and boost test efficiency.

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Auto-discovery of hardware

Integrated hardware control

VISIQ automatically discovers compatible coherent
receiver and oscilloscope hardware on the USB or
ethernet network for a hassle-free setup.

Control oscilloscope, coherent receiver and the internallaser within VISIQ software interface, so you do not needto switch between software.

Dynamic CoRx auto-calibration

Modular MATLAB integration

Automatic receiver calibration algorithm detects
receiver IQ skew, gain imbalance and DC offset from themeasured signal to remove them on-the-fly.

Import your own MATLAB algorithm into thereconfigurable nodal DSP pipeline, giving you the freedom
to place your code anywhere within the DSP chain.

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On-the-fly adjustment of DSP

Save, recall and replay

parameters

measurements

Modify DSP parameters while running in continuous
acquisition mode for instant feedback.

Conveniently save projects, graphs or series of raw
waveforms and play them back for offline processing.

Save graphs as CSV or image
file format
Save the graph you want to keep as a CSV file, so you
can plot it again in a different software tool.

Supports SCPI and gRPC remote control
In addition to the intuitive GUI, VISIQ supports test automation via SCPI
and GRPC command support.

Screenshot-friendly signal
summary
The signal summary bar enables effective
documentation by recording key signal informationin every screen capture.

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C-, L- and O-band coherent
modulation analysis
Supports C-, L-, and O-band signal measurement when
paired with Quantifi Photonics’ IQRX coherent receiver
hardware.

Intuitive layout
VISIQ’s user interface has been carefully designed to offer an intuitive and user-friendly layout that empowers users tofocus on their work & maximize productivity. No more struggling to navigate complex menus or searching for hidden
functions; every action is easily accessible, saving time and reducing frustration. New users can quickly become
proficient with the software, eliminating the need for extensive training sessions or drilling down into cumbersome
user manuals.

135264781.

Show/hide system menu

5.

Visualization area2.

Configuration menu

6.

Analysis measurements table

3.

Configuration control panel

7.

Signal summary panel

4.

Data acquisition control

8.

Connection status

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Drag-and-drop DSP nodes
VISIQ is designed for ease-of-use. A convenient drag-and-drop interface for the built-in functional DSP nodes allows
you to view and configure the full DSP chain in one place, minimizing configuration errors.

Pipeline

Add nodes

Carrier offset

Carrier offset

Phase estimator

Phase estimator

New node
New nodeNODEDESCRIPTION

Carrier offset

Estimates and compensates the residual frequency offset between thecarrier and the local oscillator that may be present in your signal.

Chromatic dispersion

Compensates for fiber chromatic dispersion.

CoRxCompensates coherent receiver imperfections such as skew, frequency
response, and IQ phase error.

CoRx auto calibrate

Manages automatic calibration of the coherent receiver.

Equalizer

Calculates the complex Finite Impulse Response (FIR) taps. It attempts tocorrect the frequency response of the signal by training over a defined
number over symbols.

FilterThis node works as a digital filter that modifies the frequency components
present in the signal.

Find Baud rate

Detects the Baud rate of the signal and replaces the Baud rate setting in theStream properties with the discovered Baud rate.

IQ offset removal

Corrects IQ offsets that may be present on the signal.

MATLAB

Enables the user to add a MATLAB script to the pipeline*

Nonlinear correction

Corrects gain imbalances, IQ offsets as well as non-linear distortion presenton the signal.

Phase estimator

Calculates and removes the phase errors over time that may be present inthe signal.

PolDeMux

Demultiplexes the two polarizations of the carrier.

Retimer

Retimes the input to a particular sample per Baud. Interpolation is used tocreate traces of samples per Baud higher than the input. The algorithm also
calculates the skew between x pol and y pol that may be present.

*Requires the user to have an existing MATLAB license and MATLAB version 2014a or newer installed on their PC.

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Measurements
VISIQ can perform a comprehensive range of measurements for full characterization of coherent signals, which canbe displayed or hidden from the measurements table.

NoiseMagnitude

Phase

TimeFrequency

•
•
•
•
•
•

•
•
•
•
•
•
•

• Phase error (rad)• IQ phase offset (rad)• IQ phase error (deg)

••
•
•
•

• Frequency offset (Hz)• Line width (Hz)• Baudrate (Hz)EVM
BER estimate
SNR
SNR (dB)Q factor
Q factor (dB)

Magnitude error (%)
IQ imbalance (dB)
IQ imbalance (%)
IQ magnitude offset (dB)
IQ magnitude offset (%)
I offset (%)
Q offset (%)

IQ skew (s)IQ skew (UI)
XY skew (s)XY skew (UI)
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Visualizations
VISIQ offers many of the visualization tools that the user will be familiar with. The visualization window can becustomized to display different visualizations including:Constellations

Eye diagrams

Processed signal displayed as an I-Q plot. Show or hidesymbols, reference symbols and trajectories.

Processed signal separated out to I and Q components
and displayed as eye diagrams.

Trace diagrams

Spectral diagrams

Processed signal separated out to I and Q components
and displayed as time series plots.

Spectral plots of raw and processed base-band signal,
displayed as magnitude, phase and total spectra.

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PolDeMux taps

Equalizer taps

Displays the optimized tap weights from thePolarization demultiplexer node.

Displays the optimized tap weights from theEqualizer node.

Polarization diagrams
The state of polarization of the signal is visuallyrepresented on the Poincare sphere, where thethree Stokes parameters are plotted in Cartesian
coordinates.

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Analysis example

400ZR DP-16QAM running at 59.8 GBaud

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M I N I M U M P C R EQ U I R E M E N TS

•Operating system: Microsoft Windows® 10 (64-bit)•Processor: Intel® CoreTM i5 or faster CPU•

Memory: 8 GB or greater

O R D E R I N G I N FO R M AT I O N

VISIQ can be purchased as a perpetual license or annual license. Licenses to use VISIQ software on additional seats
are also available.

Version number

VISIQ - X X X X - X /XX

1001

License typeP
AARAA====Perpetual license, single user
Annual license, single user
Annual license, single user, renewal
Annual license, single user, additional seat

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C ATA LO G U EGenerate high-bandwidth, complex modulation format
optical signals with our high-performance coherent
optical communications solutions.
IQTX
Coherent Optical Modulation Transmitter
Generate and control phase-modulated opticalsignals at 11 GHz, 20 GHz, 23 GHz or 40 GHz
of bandwidth. Supports M-QAM, M-PSK andcustom modulation formats & Baud rates
beyond 64 GBaud.

IQRX
Coherent Optical ReceiverGold standard coherent receiver for themeasurement of coherent modulation formats
such as QPSK, 64QAM and OFDM. The world’s
only commercially-available O-Band coherent
receiver, also available in C/L-Band.

OMA
Optical Modulation Analyzer
High-performance reference coherent signal
analyzer with powerful software for fullcharacterization of 600G, 800G signals & more.

IQABC
Automatic Bias Controller
Modulation format independent Automatic
Bias Controller for IQ-modulators. Accuratelyand reliably control and optimize modulator
bias points regardless of the modulation
format or pattern.

Co-Rx
Automated Coherent Receiver Tester
Automated sequential measurement ofcoherent receiver hardware performance tosave test time and generate accurate andreliable results.

W H Y C H O O S E Q UA N T I F I P H OTO N I C S

Test.
Measure.
Solve.
TM

Quantifi Photonics is transforming the world of photonics test andmeasurement. Our portfolio of optical and electrical test instruments is
rapidly expanding to meet the needs of engineers and scientists around theglobe. From enabling ground-breaking experiments to driving highly efficient
production testing, you’ll find us working with customers to solve complex
problems with experience and innovation.

To find out more, get in touch with us today.
General Enquiries
Technical Support
Phone - NZ
Phone - USAsales@quantifiphotonics.com
support@quantifiphotonics.com+64 9 478 4849
+1-800-803-8872

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Quantifi Photonics Ltd © 2023. All rights reserved. No part of this publication may be reproduced, adapted, or translated in any form or by any means without the priorpermission from Quantifi Photonics Ltd. All specifications are subject to change without notice. Please contact Quantifi Photonics for the latest information. MATLAB®
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