MOGlabs QRF041 User manual

Quad RF Synthesizer
QRF041/QRF241
Version0.2.0,Rev2hardware

Limitation of Liability
MOGLaboratoriesPtyLtd(MOGLabs)doesnotassumeanyliabi-
lity arising out of the use of the information contained within this
manual. This document may contain or reference information and
products protected by copyrights or patents and does not convey
any license under the patent rights of MOGLabs, nor the rights of
others. MOGLabs will not be liable for any defect in hardware or
softwareorlossorinadequacyofdataofanykind,orforanydirect,
indirect, incidental, or consequential damages in connections with
orarisingoutoftheperformanceoruseofanyofitsproducts. The
foregoing limitation of liability shall be equally applicable to any
serviceprovidedbyMOGLabs.
Copyright
Copyright c MOGLaboratoriesPty Ltd(MOGLabs) 2015– 2020.
Nopartofthispublicationmaybereproduced,storedinaretrieval
system, or transmitted, in any form or by any means, electronic,
mechanical, photocopying or otherwise, without the prior written
permissionofMOGLabs.
Contact
Forfurtherinformation,pleasecontact:
MOGLaboratoriesP/L
49UniversitySt
CarltonVIC3053
AUSTRALIA
[phone]
[email protected]
MOGLabsUSALLC
41914thSt
HuntingdonPA16652
USA
[phone]
www.moglabs.com

Preface
Acousto-optic modulators (AOMs) are an integral part of many mo-
dern laser-based experiments. They are used for frequency shif-
ting, amplitude modulation, and laser frequency stabilisation. The
MOGLabsQRF quad RF synthesizer provides a user-friendly device
thatcansimultaneouslycontrolfourAOMsatonce,withdirectoutput
ofupto2Wperchannel.
Thewidefrequencyrange(10to200MHz)iscompatiblewithmost
commonAOMs,anditprovideshigh-resolutionfrequency,amplitude
andphase control. TheQRF provides analoguemodulation of each
channelwith70kHzbandwidth,ergonomicfront-panelcontrols,and
ethernet/USB interface. Theincludedtablemodeallowsgeneration
ofpredefinedtime-dependentwaveforms. TheQRFisissinglesmall
(half-rackwidth)boxwhichconnectsdirectlytoACmainspower.
Asyoudelveintothismanualyouwilluncovermoreandmorecapa-
bility,butthemicrocontrollerattheheartoftheQRFallowssoftware
improvements to add new features, so please check the MOGLabs
websiteforupdates,examplecode,andassistance.
We hope that you enjoy using the QRF, and please let us know if
you have any suggestions for improvement in the QRF or in this
document,sothatwecanmakelifeinthelabbetterforall.
MOGLabs,Melbourne,Australia
www.moglabs.com
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ii

Safety Precautions
Safeandeffectiveuseofthisproductisveryimportant. Pleaseread
thefollowingsafetyinformation beforeattemptingtooperate. Also
please note several specific and unusual cautionary notes before
usingtheMOGLabsQRF,inadditiontothe safetyprecautionsthat
arestandardforanyelectronicequipment.
CAUTION Toensurecorrectcoolingairflow,theunitshouldnotbeope-
ratedwithcoverremoved.
WARNING Highvoltagesareexposedinternally,particularlyaroundthe
mains power inlet and internal power supply unit. The unit
shouldnotbeoperatedwithcoverremoved.
NOTE The MOGLabs QRF is designed for use in scientific research
laboratories. It should not be used for consumer or medical
applications.
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Protection Features
TheMOGLabsQRF includesanumberoffeaturestoprotectyouand
yourdevice.
Open/short circuit Each RF output should be connected to a 50Ωload where
possible. The high-power output can tolerate open-circuit,
butshouldnotbeshort-circuited.
Mains filter Protectionagainstmainstransients.
Temperature Severaltemperaturesensorscontrolthefanandwilltriggera
shutdownifthetemperatureexceedsasafelimit.
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RoHS Certification of
Conformance
MOGLaboratoriesPtyLtdcertifiesthattheMOGLabsDiodeLaser
Controller(Revision3)isRoHS-5compliant. MOGLaboratoriesno-
tes,however,thattheproductdoesnotfallunderthescopedefined
in RoHS Directive 2002/95/EC, and is not subject to compliance,
inaccordancewithDIRECTIVE 2002/95/EC Out of Scope; Electro-
nics related; Intended application is for Monitoring and Control or
Medical Instrumentation.
MOG Laboratories Pty Ltd makes no claims or inferences of the
compliancestatusofitsproductsifusedotherthanfortheirintended
purpose.
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Contents
Preface i
Safety Precautions iii
Protection Features iv
RoHS Certification of Conformance v
Getting started ix
1 Introduction 1
1.1 Operatingmodes..................... 2
1.2 Featurecompatibility . . . . . . . . . . . . . . . . . . 3
2 Connections and controls 5
2.1 Frontpanelcontrols . . . . . . . . . . . . . . . . . . . 5
2.2 Menusystem....................... 6
2.3 Rearpanelcontrolsandconnections. . . . . . . . . . 8
2.4 InternalDIPswitches . . . . . . . . . . . . . . . . . . 9
3 MOGRF host software 11
3.1 Devicediscovery . . . . . . . . . . . . . . . . . . . . . 11
3.2 Devicecommander . . . . . . . . . . . . . . . . . . . . 12
3.3 MOGRFmainwindow . . . . . . . . . . . . . . . . . . 13
4 External modulation 17
4.1 Operationalprinciple. . . . . . . . . . . . . . . . . . . 17
4.2 Modulationgain . . . . . . . . . . . . . . . . . . . . . 18
4.3 Dualmodulation . . . . . . . . . . . . . . . . . . . . . 18
4.4 PIDstabilisation . . . . . . . . . . . . . . . . . . . . . 21
4.5 TTLswitching....................... 23
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Contents vii
5 Table mode 25
5.1 Operationalprinciple. . . . . . . . . . . . . . . . . . . 25
5.2 Externaltrigger . . . . . . . . . . . . . . . . . . . . . . 27
5.3 Re-armandrestart . . . . . . . . . . . . . . . . . . . . 27
A Specifications 29
B Firmware upgrades 31
B.1 Upgradeviamogrf .................... 31
B.2 Factoryreset....................... 32
C Command language 35
C.1 Arguments......................... 35
C.2 Generalfunctions . . . . . . . . . . . . . . . . . . . . . 36
C.3 Basiccontrol ....................... 36
C.4 PrimaryRF control.................... 37
C.5 Modulation ........................ 38
C.6 Clockreference...................... 39
C.7 Tablemode ........................ 40
C.8 PIDfeedback....................... 42
C.9 Ethernetsettings . . . . . . . . . . . . . . . . . . . . . 43
D Communications 45
D.1Protocol.......................... 45
D.2TCP/IP........................... 45
D.3USB............................ 46
E Code examples 49
E.1 python ........................... 49
E.2 matlab ........................... 50
E.3 LabVIEW .......................... 51

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