Harris Micromax User manual

Micromax
30 Watt Solid-State
FM Exciter
Operation Manual

WARNING: Disconnectprimarypowerpriortoservicing
HarrisMicromaxFMExciter REV 1 01/12/2007

HarrisMicromaxFMExciter REV 1 01/12/2007
WARNING: Disconnectprimarypowerpriortoservicing
1. PreliminaryInstructions
Thismanualis written asageneral guide forthosehaving previous knowledgeandexperience
withthiskindofequipment.
Itis not intended to contain a complete statementofallsafetyruleswhichshouldbeobservedby
personnelin using thisorotherelectronicequipment.
Theinstallation,useandmaintenanceofthispieceofequipmentinvolverisksbothforthepersonnel
performingthemandforthedeviceitself, that shall beusedonlybytrainedpersonnel.
Harrisdoesnotassumeresponsibilityfor injury or damageresultingfromimproperprocedures
orpracticesbyuntrained/unqualifiedpersonnelinthehandlingofthisunit.
Pleaseobserveall local codesandfire protection standardsinthe operationofthis unit.
WARNING:Alwaysdisconnect powerbeforeopeningcoversorremovinganypartofthis unit.
Useappropriate grounding procedures to short out capacitorsand highvoltage points before
servicing.
HarrisCorporationreservestherighttomodifythe design and/or thetechnicalspecificationsof
theproductandthismanualwithoutnotice.

WARNING: Disconnectprimarypowerpriortoservicing
HarrisMicromaxFM Exciter REV 1 01/12/2007
2. FirstAid
Thepersonnelemployedintheinstallation,useandmaintenanceofthedevice,shall be familiar
withtheoryandpractice of firstaid..
2.1 Treatmentof electrical shocks
2.1.1 Ifthe victimisnotresponsive
FollowtheA-B-C's ofbasic life support
• Placevictimflat onhisback on ahardsurface.
• Openairway: lift upneck, pushforehead back (Fig.3-1).
• Clearoutmouthif necessary andobserveforbreathing
• Ifnot breathing, beginartificialbreathing(Figure3-2):tilthead,pinchnostrils,makeairtight
seal,fourquickfullbreaths.Remembermouthtomouthresuscitationmustbecommencedas
soonas possible
Figure3-1 Figure3-2
• Check for pulse (Fig 3-3); if pulse is absent, begin artificial circulation
(Fig.3-4) depressing sternum(Fig.3-5)
Figure3-3 Figure3-4 Figure3-5
• Incase ofonly one rescuer,15 compressionsalternated totwo breaths.
• Ifthere are tworescuers, therhythm shall beof onebreath each 5compressions.
• Donotinterrupttherhythm of compressionswhen thesecondpersonisgiving breath.
• Call for medical assistance as soon as possible.

HarrisMicromaxFM Exciter REV 1 01/12/2007
WARNING: Disconnectprimarypowerpriortoservicing
2.1.2 If victim is responsive
•Keepthem warm
•Keep them as quiet as possible
•Loosentheir clothing (areclining positionis recommended)
•Call for medical help as soon as possible
2.2 TreatmentofelectricalBurns
2.2.1 Extensiveburnedandbrokenskin
• Cover area with cleansheet or cloth
• Do not break blisters, remove tissue, remove adhered particles of clothing, or apply any
salveorointment.
• Treatvictim for shockasrequired.
• Arrangetransportationto a hospitalasquicklyas possible.
• Ifarms or legsare affected keepthem elevated
Ifmedical helpwillnotbeavailablewithinanhourand thevictimisconsciousandnotvomiting,
givehim a weak solution of salt and soda: 1 level teaspoonful of saltand1/2levelteaspoonfulof
baking soda to each quart of water (neither hot or cold).Allow victim to sip slowly about 4
ounces(halfaglass)over a period of 15 minutes. Discontinue fluid if vomiting occurs
DONOTgive alcohol
2.2.2 Lesssevereburns
• Applycool (noticecold)compressesusingthecleansed available cloth article.
• Donot breakblisters, removetissue, removeadhered particles ofclothing, orapply salveor
ointment.
• Applycleandrydressingifnecessary.
• Treatvictim for shockasrequired.
• Arrangetransportationto a hospitalasquicklyas possible
• Ifarms or legsare affectedkeep them elevated.

WARNING: Disconnectprimarypowerpriortoservicing
HarrisMicromaxFM Exciter REV 1 01/12/2007

HarrisMicromaxFM Exciter REV 1 01/12/2007
WARNING: Disconnectprimarypowerpriortoservicing
TABLEOFCONTENTS Page
SECTION1 GeneralDescription
1.1 Introduction 1-1
1.2 Equipment function 1-1
1.3 Physical description 1-1
1.4 Electrical description 1-2
1.5 Simplified block diagrams 1-2
1.6 List of subsystems 1-2
SECTION2 Installation
2.1 Introduction 2-1
2.2 Unpacking 2-1
2.3 Returns and exchanges 2-1
2.4 Installation 2-1
2.4.1 A/C power connection 2-1
2.4.2 RF output connection 2-2
2.4.3 Audio input connections 2-2
2.4.3.1 MPX (composite) audio input connection 2-3
2.4.3.2 Mono audio input connection 2-3
2.4.3.3 Left and right channel audio inputs 2-4
2.4.4 Remote I/O connector 2-5
2.4.5 Service connector 2-6
SECTION3 Operation
3.1 Introduction 3-1
3.2 Turning on the exciter 3-1
3.3 Adjusting RF power output 3-2
3.4 Operating frequency selection 3-3
3.5 Adjusting modulation deviation level 3-4
3.6 Front panel LCD display menu description 3-5
3.6.1 Operations menu 3-5
3.6.2 Powermenu 3-6
3.6.3 Poweramplifiermenu 3-6
3.6.4 Miscellaneous menu 3-6
3.6.5 Versions menu 3-6
3.6.6 Channels menu 3-6

WARNING: Disconnectprimarypowerpriortoservicing
HarrisMicromaxFM Exciter REV 1 01/12/2007

HarrisMicromaxFMExciter Installation REV1 01/12/2007
2-1
WARNING: Disconnectprimarypowerpriortoservicing
SECTION2
Installation
2.1 Introduction
Thissectioncontainsinformationonhow toinstallthe exciterandcoversthefollowingtopics:
• Unpacking(2.2)
• Returnsand Exchanges (2.3)
• Installation(2.4)
• A/C power connection (2.4.1)
• RFoutputconnection(2.4.2)
• Audioinputconnections(2.4.3)
• RemoteI/O connector(2.4.5)
• Serviceconnector(2.4.5)
2.2 Unpacking
Theunitis shippedinacardboardbox. Theshippingboxalso containsthemanualandtheA/Cpower
cord. Open the box and perform a visual check to determine that there was no physical damage during
shipment. Noteanydamageonthebillof ladingand retainshipping documents.
Ifthe contents are incompleteorif the unitisdamaged,contact the carrierandfactory immediately.
Timelimitto filedamageclaimswiththecarrieris14days.
2.3 Returnsand exchanges
Damagedor undamagedequipmentshould notbereturned withoutfirstobtaining returnauthorization
fromfactory. Factorywill providespecial shippinginstructions andprovideaRMAnumberto insureproper
handling. Ifyou need to return the unit, contact the customer service department at factory and have your
modelnumber andserial numberavailable. Serialnumber islocated onthe rearpanel.
2.4 Installation
Prior to installation, the manual should be carefully studied to get an overall understanding of the
system. Thiswillfacilitateproperinstallationandinitialcheckout.

2-2
WARNING: Disconnectprimarypowerpriorto servicing
HarrisMicromaxFMExciter Installation REV1 01/12/2007
2.4.1 A/CPowerconnection
TheMicromaxoperateson80-260VoltsAC(50or60Hzsinglephase)
ConnecttheAC power on rear panel.
2.4.2 RFoutputconnection
Connectanantennaor an RF load to the type BNC female RF output connector on therearpanel.
2.4.3 Audioinputconnections
Allprogramaudioconnectionsare on the rear panel. Micromax is designed to accept any one of the
threetypesofprogramaudioinputs:
(1)MPX (composite)
(2)Mono
(3)Leftandrightchannels (usingthebuilt-instereogenerator)
(4)AES/EBUwithoptionaldigitalinputcard
ConnectACcordhere
ConnectRFOutputtoantennahere
(REARPANEL VIEW)
(REARPANEL VIEW)

HarrisMicromaxFMExciter Installation REV1 01/12/2007
2-3
WARNING: Disconnectprimarypowerpriortoservicing
2.4.3.1 MPX(composite) audioinputconnection
Connect MPX (composite) audio input to BNC connector on rear panel. On the front panel LCD
display,goto SETmenuandselectmono(composite)fromthe audiomono/stereo selection(see section3of
manualonhowtonavigatetheLCDdisplay).
2.4.3.2 Monoaudio inputconnection
ConnectMonoaudio inputtoXLRconnectoron rearpanel. Onthefrontpanel LCDdisplay,go toSET
menuand selectmono (composite)fromthe audiomono/stereo selection(seesection3of manualon howto
navigatetheLCD display).
Connectmonoaudioinputhere
ConnectMPX(composite)audioinputhere
(REARPANEL VIEW)
(REARPANEL VIEW)

2-4
WARNING: Disconnectprimarypowerpriorto servicing
HarrisMicromaxFMExciter Installation REV1 01/12/2007
2.4.3.3 Leftandrightchannelaudio inputs (using the built-in stereo generator)
Connectleft andrightchannel audioinputsto XLR connectorson rear panel. Onthefront panelLCD
display,go to SETmenuandselect stereo fromtheaudio mono/stereo selection(seesection 3 of manualon
howtonavigatetheLCDdisplay). Thiswillactivatethebuilt-instereogeneratorandturnonthe19kHzstereo
pilottone at10% injection.
Connectleftaudioinputhere Connectrightaudioinputhere
(REARPANEL VIEW)

HarrisMicromaxFMExciter Installation REV1 01/12/2007
2-5
WARNING: Disconnectprimarypowerpriortoservicing
2.4.4 RemoteI/Oconnector(usingprovidedDB15interfacejumper)
RemotecontrolandmonitoringofthetransmitterisavailablethroughaDB15connectorontherear
panel. FollowingdescribesthefunctionofeachpinontheremoteI/OconnectorusingtheprovidedDB15
interfacejumper.
Type: DB15female (cableend)
19
PIN FUNCTION TYPE DESCRIPTION
1 GROUND GROUND
2 FWDPOWER OUTanalog 0 to 4V Adjustable
3 RFLPOWER OUTanalog 0to4V
4 PAV OUTanalog 0to4V
5 PA I OUTanalog 0to4V
6 FAULT OUTdigital Output low in Fault condition (adjustable by PgD setting)
7 N/C No connection
8 EXCITERAPC INPUT Ext. signal, for power limitation (set by FWD AGC pot)
9 RFMUTE INPUT Short to ground to operate (tied to 14)
10 INTLKCOM OUT Relay contacts COM
11 INTLKNC OUT Relay contacts NC
12 INTLKNO OUT Relay contacts NO
13 EXCONCMD INPUTdigital Lowpulse(500ms) enables RF*
14 RFMUTE INPUT Short to ground to operate (tied to 9)
15 EXCOFFCMD INPUTdigital Lowpulse(500ms)disablesRF
*RFUNMUTESINASLOWRAMPUP

2-6
WARNING: Disconnectprimarypowerpriorto servicing
HarrisMicromaxFMExciter Installation REV1 01/12/2007
2.4.5 Serviceconnector
ServiceconnectorisusedtointerfacewithacomputerRS232port. Itcanalsobeusedtoremotely
setoperatingfrequencyandRFpowerleveloftheexciter(seeattachment1onpage3-7).
Followingdescribesthefunctionofeachpinonthisconnector:
Type:DB9female
1NC
2 TX_D
3 RX_D
4 Internallyconnectedwith6
5 GND
6 Internallyconnectedwith4
7 Internallyconnectedwith8
8 Internallyconnectedwith7
9NC
16

HarrisMicromaxFMExciter System Overview REV1 01/12/2007
1-1
WARNING: Disconnect primary power prior to servicing
SECTION 1
SystemOverview
1.1 Introduction
This section contains system overview information and covers the following topics:
• Equipment Function (1.2)
• Physical Description (1.3)
• System Front and Rear Views (1.4)
• Simplified Block Diagrams (1.5)
• List of Subsystems (1.6)
• TechnicalandMechanicalSpecifications(Tables1.1)
1.2 Equipmentfunction
The Harris Micromax is a 30 Watt FM exciter designed to operate in the 88-108 MHz range in 10
kHzsteps. TheRF power is adjustable continuously from 0-100% ofratedpower. Itisdesigned to handle
MPX(composite), mono and left/right audio inputs with the built-in stereo generator. Theinternal stereo
generatorcan be turnedon or offinthe field.
Inaddition,anoptionalAES/EBUmoduleisavailablefordigitalaudioinputcapability.
Inkeepingwiththedesignphilosophyofmodularityandmaintainability,Micromaxuseseasilyremovable
andserviceable subsystems. Listof subsystemsis outlinedinsection1.6.
1.3 Physicaldescription
Micromaxiselectricallyandmechanicallymodular indesign. Theentiresystemiscontainedina19”
rackthat is1.75” high. Allsubsystemsare assembledwith removableconnectorsto allowfor easyservicing
andreplacement.
Thefront panel containsanLCDdisplay for meteringandcontrol, a menunavigationand selection
knob,on/off switchand statusLEDs.
RearpanelcontainsACinputblock,RFconnectors,audioconnectors, remotecontroland monitoring
connectors.
SeeFigure 1-1 for front andrearviews of the MicromaxFMexciter.

1-2
WARNING: Disconnect primary power prior to servicing
HarrisMicromaxFMExciter System Overview REV1 01/12/2007
1.4 Electricaldescription
MicromaxisaselfcontainedbroadbandFMexciter. ThefrequencyofoperationandRFpowerlevel
are selectable from the front panel. Amicroprocessor controller monitors all operating parameters and
automaticallylowers RFoutput incase ofhigh VSWRortemperature.
Unitispoweredbyahigh efficiency, universalACinput(80-260VAC)switchingpower supply. The
RFoutput module istotallybroadbandacross the FMbandand is capableofdelivering RF outputpowerof
up to 30 Watts.
Technical specificationsoftheMicromaxisshowninTable1-1.
1.5 Simplifiedblockdiagrams
Micromaxis composedof modularsubsystems thatareeasilyremovableandserviceable.
A simplified block diagram of how all the subsystems are interconnected is shown in Figure 1-3.
Locationof subsystemsis showninFigure1-4.
1.6 List of subsystems
Micromaxiscomposedof thefollowingsubsystems:
1. Powersupply
2. Main card
3. Controllercard
4. RFPower amplifier
5. AES/EBU card (optional)

HarrisMicromaxFMExciter System Overview REV1 01/12/2007
1-3
WARNING: Disconnect primary power prior to servicing
FIGURE 1-1
FrontandRearViews

1-4
WARNING: Disconnect primary power prior to servicing
HarrisMicromaxFMExciter System Overview REV1 01/12/2007
TABLE1-1
TechnicalSpecifications
Panel size 483mm (19”)x 44mm (1.75”)(1U)
Depth 286mm (11.25”)
Weight 6 Kg (13.2 lbs)
OperatingTemperature -10 °C ÷50 °C
Electrical specifications
General
RFoutput power 0 to 30 Watts, adjustable
RFoutput connector "N"-type
RFoutput impedance 50Ohm
Frequencyrange 87.5 MHz ÷108 MHz
Frequencysetting Direct softwareprogramming
Frequencystability ±1ppm from-10°C to50°C
Modulationtype Direct carriermodulation
Spuriousand Harmonicssuppression Meets or exceedsFCC and CCIR
standards (typical -75 dBc)
Modulationcapability Meets orexceeds FCC andCCIR
standards(typical 240khz MPX/
Composite/mono,210 KHzStereo)
AsyncronousresidualAM < -60 dB wrt. 100% peakAM
SyncronousresidualAM <-50 dB wrt. 100% peak AM, with
75kHz deviation@ 400Hz
A/Cpower supply ≅80 V ÷260 V, full-range
D/Cpower supply 28 V
Powerconsumption 120 Watts
Input
Left, right,AES/EBU and mono Input Type:XLRfemale
balancedorunbalanced
Composite(MPX)input Type:BNC, unbalanced
Inputimpedance balanced input: 600 or 10 k Ohm
selectable,unbalanced input: 50or
10 k Ohm selectable
Inputlevel -13 dBm ÷ +13 dBm, continuosly
adjustable
Preemphasis Selectable: 0
50us(CCIR)
75us (FCC)

HarrisMicromaxFMExciter System Overview REV1 01/12/2007
1-5
WARNING: Disconnect primary power prior to servicing
SCA/RDSinput 2 BNCunbal
SCA/RDSinput impedance 10kOhm
SCA/RDSinput level -20 dBm ÷ +13 dBm for 2.0 kHz
continuoslyadjustable
SCA/RDSamplitude/frequencyresponse ± 0.2 dB, 40 kHz to 100 kHz
Output
RFOuput “BNC”-type, 50Ohm
RF Test BNC connector, --13 dBm +/-6 dB
50Ohm
19 kHz pilot tone output BNCconnector,1 Vpp
minimum load 4.7 kOhm
Composite or Mono operation
S/N > 70dB wrt. 75 kHz, measured in the band 30 Hz
÷ 20 kHz, 50 us deemph., RMS detect
Amplitudefrequency response ± 0.5 dB, 20Hz ÷ 15Khz
Totalharmonic distortion(THD) < 0.08%
MPX operation
composite S/N > 70 dB wrt. 75 kHz, measured in the band 30 Hz
÷ 20 kHz, 50 us deemph., RMS detect
MPXamplitudefrequency response ± 0.3 dB, 30 Hz ÷53 KHz
± 0.3 dB, 53 KHz ÷100 KHz
MPXtotal harmonicdistortion (THD) < 0.08 %
Stereoseparation > 55 dB (typ. 60dB, with external stereo generator)
Stereo operation
S/N FM Stereo > 70 dB wrt. 75 kHz, measured on decoded
channels, in the band 30 Hz ÷ 20 KHz,
50 us deemph, RMS detector
Audiofrequencyresponse ± 0.5 dB, 30 Hz ÷15 KHz
Totalharmonic distortion(THD) ≤0.08 %
Stereoseparation > 50 dB
Connections
Interlockconnector BNC, inhibits RFpower output whenshorted to
ground
Service(serial)interface DB9 femaleRS232
Remote DB15female
TABLE1-1(continued)
TechnicalSpecifications

1-6
WARNING: Disconnect primary power prior to servicing
HarrisMicromaxFMExciter System Overview REV1 01/12/2007
FIGURE 1-3
BlockDiagram
ANTENNA
MAINCARD
CONTROLLER
AES/EBUCARD
(OPTIONAL)
30W RF PA
POWER SUPPLY
AUDIOIN