Ten-Tec_Omni-4_562_review_1990.pdf

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1、CQREVIEWS: Ten-TeesModel 562,Omni V HF Transceiver BY JOHN J. SCHULTZ,W4FAlSVWX minutes isachieved withOUtanycooling fan beingused. Asmallexternal cooling fancanbe used ifyouwanttooperatekey-oown forever e.q.,beaconoperation).And, if Imayjumpa bit ahead withmystory, thefactthattheOmni V has no cooli

2、ng fanthat mightperiodicallycy- cleonandoff(evenduringreceiveperiodsas isthecasewithsomeotnertransceivers) plus itsextremelyelectricallyquietoperationonre- ceivemakeit oneofthemostfatigue-tree transceiversI have everoperatedwhile trying toeopyweak signals. Thereceiverspecificationsare also very n-Te

3、ccertainly achieved an American Iirst with their Paragon transceiver.Ten- Tee will continue toproducethaItransceiver, andcertainly Ihighlyrecommendittoanyam- ateurwhodesires an all-around, excellent qualityHFtransceiverincorporating general- coverage receive. TheOmniV,ontheother hand.canberegarded a

4、sanexclusive edition althaParagonlortnosewhodesireoptimized amateur-band-onlyperformanceIroma trans- ceiver in the$2,000pricerange. Theoptimizedperlormance01theOmo; V revolves around a uniQue idea that the engi- neers at Ten-Tee developed whichcombines the best features 01 frequency synthesizer tech

5、nology with the featuresofwhatmightbe calledanalog frequencymixing.Thelormer,in conjunctionwith microprocessor-basedcon- trol, allowsthe bells-and-whistles features like frequencymemories anddualVFOs,while the latterfeature recreates the cleanreceive sig- nalperformanceofa bygoneerabeforetrans- ceiv

6、erswentdigital. Although Idubbedthe Omni Vanexclusive editionofthe Paragon transceiver,it is not sim- plya Paragonwitha few internalcircuitry changes, Variousfeatures are significantly dif- ferent betweenthetwoseriesoftransceivers both internally and externally. Many operators will probablymorethanw

7、elcomethe excep- tionalreceiveperformance01theOmniVasa trace-otttor some reduced convenience fea- tures as compared to the Paragon. pecificalions Table Ipresents the detailedspecificationsfor the Omni V asgivenbyTen-Tee.The general specifications note thattheunitcoversall am- ateur bands from160thro

8、ugh 10meterswith anover-shoot ateachband end suitablefor mostMARSoperation,Thefrequencyreadouf isdownto10Hz.Thealmostall aluminum con- structionotmeOmni V, like the Paragon,pro- duces analmostunbelievablylightweight transceiver for itspowerclass. It really is hard toimaginethata 16 poundpackagecould

9、 en- cesesuch a full-featured transceiver.IIyou haveever luggedaroundsomeofthe larger steel boxtransceivers forportableoperation, youllappreciatewhatI meanbythis. Thetransmitterspecificationsarevery muchstate-of-the-art.Thecarrier and side- band suppression ligures are excellent, as is the spurious

10、outputspecification. The key- down,200wattinputspecification for upto20 General FrequencyRange FrequencyControl FrequencyReadout FrequencyStability FrequencyAccuracy AntennaImpedance Power Required Construction Dimensions Net Weight Transmitter Modes DCPowerInput RF PowerOutput MicrophoneInput TIASw

11、itching CWSidetone sseGeneration earnerSuppression UnwantedSideband Suppression Spurious Output Meter CWOIfset FSKShift SSBMonilor muchstate-or-the-an. Thedynamic range and Ihird-orderinterceptliguresareexcellent (moreaboutthosetater).There isa fullrangeof anti-ORMcontrolsfromthe IF passband tun- in

12、g toaudio bandpass tuningtoan audio notch filter and even a tonecontrol. Both the stan- dardandoptionalIFfilterspecifications are given.Unfortunately,the optionalfillerspecifi- cationsdonot indicate aspecialfeatureof the Omni V in that afurtheroptional filler(forCW, sse,orFSKjmaybe installedin the 9

13、MHzIF whichwillworkin series with theoptional fil- terssrcwnin the tableforthe 6MHzIF. The to- Transmit and receiveon allhambands from160through10meters in theirentirety. Twelve500kHz segments plus30kHz over-shootat eachbandend. Mrcrcprccessor-controueddigital Pl L synthesizer with crystal mixed osc

14、illator.10Hzresolution. 7digit10Hz vacuumfluorescenlreadout. Worstcase, 1 PPM perdegreeCat29,999MHz. 100Hzat250C 500unbalanced. Receive :apprcx.1.5 A Transmit=approx.20Aat13.8 VDC, Rigidaluminumchassis.Extrudedaluminumfront panel.Textured top arobottom.snapupstainless steel bail. Printedcircuit boar

15、dsG-10 epoxyglass. HWD5o/. N x14r.x17(14,6x37.4x43.2em). 161bs.(7,25kg), USB, LSB,CW,RnY(FSK or AFSK),(FM optional). Maximum200wattsat14VDCCW,SSB.(FM).100%dutycyclefor up to20minutes. Continuouswithauxiliaryair cooling ofOmniVamplitier heatsink. 25to100wallsadjustablewithfront-panel RF PWR control.

16、lowimpedanceFour-pin front-panelconnectoracceptsmicro- phones with5mV( -62dB)output. Polarizing voltage isprovided lor electrets. VOX orPTTonSSB.Switchable FASTorSLOW QSK on CWo Internally generated, adjustable toneandvolumeindependent of AF GAIN control. 9 MHz, 6-polecrystauaooerfilter. Balancedrro

17、cotatcr. 60dBtypical. 60dBtypicalat 1.5 kHz tone. Morethan 45dBbelowpeakpoweroutput. Switchableforwardpower.SWR,collectorcurrent,audioprocessing level. 6CX)Hzautomatic. 170 Hz. Externalmonitorjackoutput. c/oCQmagazine 20COJ.nu.ry1990 TableI-Specifications of theTeTecDmniVHFTransceiver- S.yYouS.wItIn

18、CO Thetront-panellayoutoftheOmni Vis verywellbalancedwithanessvon-me-eveefrequencydis- play, the analogcontrols on the left,andthelargekeypadaroundthemain luningcontrOl. tal result isthatyoucouldendupwithanout- Slanding 24 poles ollHteringloronemode,de- pending uponwhichoptional filters are in- stal

19、led! As impressive asthespecification table for the Omni V is,nowthatI haveusedthetrans- FREOUENCY MOD E MHz1.8 .29.999 SSB.CWoRTTY.lSV10dbSIN2.4kHz (FM).30V12dbSINAD 15kHz Themostobvious displayfeatureisthelarge frequencyreadout.IIsagreenfluorescent typewithaboutinchhighnumerals.Itsvery comfortable

20、toworkwithoverextended oper- ating periods. The display ispermanentlyset todisplaydownto 10Hz. The display is also usedtocallupeitherthecurrent time(hours andminutes) or acalendarfeature(monthand day)derivedfroma bunt-rnctccwcareroer.To the leftofthedisplaythereare three annuncia- torsfor VFO A, VFO

21、 B, or SPLIT. All the restofthe displaysandcontrols, ex- ceptthoseassociatedwiththe keypad around themain tuningknob, are the same as in the Paragon transceiver.IIswhatI call the analog sideottnefront panel.Thesecontrols were all describedin detail inPartofmyParagonre- view(CQ, May 1988),soIwontgoin

22、tothemin detailherebet will just highlight a tewreanrres. 1. Themetering isquiteccmcrerelor aU functionsincludingpoweroutput. SWR.col- lectorcurrent,andspeechprocessing level. 2. Themicrophonegain control hasanLED associatedwithit formonitoring theAlClevel, whichisveryconvenientwhenthe processor is

23、used,sincethemetercanbededicated to checktheprocessing level. 3.The AFpoweroutput level iscontinuously variablefromabout20to 100watts. 4. A separate AF gaincontrol is provided andthere is all-modesquelch. 5. The AF gaincontrolisassociatedwith a tonecontroltoroll-off the higher frequencies. 6. There

24、isanaudiobandpass filterwithva- riablebandwidth. Onecontrolsetsthe center frequencyof the fitter(200to1700Hz) while anotherconcentric control pulls in the skirtsof thelilter(aroundthecenterfrequency)froman essentially flat responsetoa fairly sharpte- sponse(35%bandwidth). 7, The passbandluning contr

25、ol is essential- ly a variablebandwidthcontroloperating over 1.2kHz. 8. Anotchfitteroperatesover the 250 to 2200Hz range and provides a fixednotch depth of40-50dBm. 9. The rest of thepusnbuttcnsare forlheus- ualfunctionssuchasreceiveinputanenuator. AGC on/off, VOXorPTToperation,aSKtasror Slow,etc. T

26、henoise-btankerswitchis associ- atedwith a variable widthcontror. Thekeypadaround the main tuningknob hasafewfeatures similar totrcseon the Para- gon,butmanyfeaturesaredifferentThere-are theusual keys formodeexceptthatanFSK keyreplacestheAMkeyon the Paragon. The veryuseful TUNEkeyis still presentabo

27、vethe modekeys.Thefillerselectionkeys are above thetuningknob andaremarked2.4, 1.8,0.5, .25,andNAR. There is006.0keysincethe Om- ntVdoesnot haveanAM mode. The 1.8,0.5, and.25keysselectanyotthecptionalfilters in- stalled in the 6MHz IF. The NAR key selects tneoptional filter Installed in the 9MHzIF w

28、hichcanbeeithera 1.8, 0.5, or .25kHztype. The keystotheimmediate rightcenter01the tuningknobcontrolthe selectionofVFOAorB, equalizingthefrequencyinthemandselling themupforscut-treqoercvoceretcn.There is also a REVkeywhichtemporarily reverses the VFOswhenin splitoperationso you can listen onyourtrans

29、millingfrequency. A FASTkeybelowthe VFO keys changes thetuningretebyafactorof5(from10Hz to50 Hz steps exceptintheFMmodewhereit !sand Controls cewerfor a reasonableperiod, Iratherfeel thatthetabledoesnotdojusticetothe rig. It makesnomentionof thelactthat25tunable memoriesare available,computercontrol

30、 in- terfaceis standard, fastaSKturn-around is less than 30ms.etc, Approx , -20dBfor 1.8to29.999MHz. tst=9.0MHz,2nd=6.3MHz, (FM 2nd=455kHz). swncnebre500phonojack. 60dB. 60dB. Switchableontoffwithadjustable width, Automaticallyswitchedonduring receive. Calibrated to 50,.V at S9. 97dBtypical. +12dBm.

31、 FM, CW,SSB, FSK(1 ,8-29.999MHz):Less than .6/lV, 1.2kHz, 1,5wattsat80withlessthan2%distortion, 250to 2.2 kHz,50dBnotchtypical. 4 pole,variablecenterfrequency220to1.7 kHz ,35%bandwidthat - 6dB. Variable fadercontrol selectsfilteredornataudioresponse. Variable 15dBrolloffat 5 kHz. USB, LSB, CW, FSKJA

32、FSK,(FMoptional) SELECTIVITY -6dB60dB FILTER STANDARD2.40kHz3.36kHz OPTIONAL1.80 kHz2.90 kHz OPTIONAL.50kHz1.40kHz OPTIONAL.25kHz.85kHz (FM)15kHz30kHz Attencatcr IF Frequencies RX Anlenna Input Image Rejection IF Rejection Noise Blanker S Meter DynamicRange 3rdOrderICP Squelch Sensitivity Passband T

33、uning Audio Output NotchFilter Audio Bandpass Filter Tone Control Selectivity Receiver Modes sensitivity SayYouSawItInCO January1990CO21 Acloserlookatthekeypad. Excepttonworeve.each keyhasasinglededicatedtunctiontoevoa confusion in operation.Itsavery user-friendlyarrangement. Takingoffthe top cover,

34、Iwas immediately impressedbythe very neat constructionandtnespa- ciousnessofthelayout.Theoscillatorcircuitryoftheteoenamixerislocatedina shieldedcom- partment on the left.Thelogicboardisto the right. Acloserlookatthelogic ooera.Therounddisc tothecenterleftisthelithiummemorybaCk-up bat/ery which will

35、 last about two years.Itis easily user-replaceable.Theconnector to the topofthe boardisfor an optional voice fre- quency readout board. the specific frequency stored in a memory Thefrequency memory system iscontrolled by justthree keys on the upper right of the key- pad. They are the MT (memory tune

36、), VFQ-M (VFOto memory), and M-VFO(memoryto VFO) keys. If youre operating on a frequency you would like stored, you depress the VFQ-M key twice. You do not have to choose a memory lo- cation. That isdone automatically unless all 25 memory locations are filled. In such a case, a decimal point in the

37、frequency display will turn on, and you havetogo through a simple pro- cedure to clear out one of the memory toea- fions. Each memory stores band, frequency, mode, and filtersetecteuoata.Toseewhat fre- quencies are stored in memory, depress the MTkey, and then as you rotate the main tuning knob, you

38、 will scroll through and have dis- played on the frequency display the frequency stored in each memorysrot.During this pro- cess, the operating frequency you were using before depressing the MT key will not change. Therefore, you can continuetooperate while scrolling through the frequencies in memor

39、y. Ifyou find a memory position on which you would like to operate, the M-VFO key is used, and the transceiver will switch to thatlrequen- cyalong with the stored mode and filter infor- mation. Once such a stored frequency istrans- ferredtoa VFO, you can,ofcourse, tune the frequency as desired and c

40、hange modeorfil- ter selection as desired. Ascratch-oad memoryisavailableby press- ing the VFO-M key only once, instead oftwice as just mentioned. In this case the current band, frequency, mode, and filter setting will be stored, but the information will not go into one of the regular 25 memory slot

41、s. The scratch-pad memory is recalled by pressing ner. When going from one band totneother, the operating frequency will automatically be located at the same position relative to each band edge. For instance, if you are on 7020 kHz andgoto20meters, the 20meter frequen- cywill appear as 14020 kHz. Ev

42、en though 10 meters is divided into four 500 kHz segments, allofthe band can be tuned without pressing anyofthe band-segment keysonceyou start out tuning in any desired band segment. There is no numeric frequency entry keypad, so to gettoa specific operating frequency within a band you have to choos

43、e that band and then tune a VFO to the desired frequency or have changes from100Hz toSODHz steps). Imme- diately to the right of the FASTkey are down and up arrow keys. These keys change the frequency in10kHz steps, or if the FASTkey is activated, in 30 kHz steps. Although the keyboard sofar has res

44、embled that of the Paragon ingeneral terms,the rest of the keyboard in the Omni V is completely dif- ferent. The center right grouping of keys con- sists of 12keys which are band-switching keys. There is one key for each band, excepttnatt0 meters has four keys for four500kHz band segments. You can Q

45、SYimmediafelybefween any band in a very clear, unambiguous man- 22COJanuary1990 SayYouSawItIn CO I . - J. C.-= r ;-. -. Takingoffthe bottom cover, you encounter a large internal shield.It has cutoutssoyoucaneasilyexchangeoraddvariousIFfillers. Also, thereareaccessholessoyoucanadjusllhingssuchasS-met

46、ercali- bration,CWkeyingwevesreoe.ALerange,carrierbalance,etc.Neat! Takingofftheinternalbottomshield,quitea formidablearrayofneatly arranged.mostlydouble-sidedPCboardsarevisible. TheIFfilterboard isto thecenterleft, themixerboardtotheupperright,andbelowitisthe passband tuning board. Below the latter

47、ispartofIhe final amplifier, whichishOused initsowncompletelyshieldedenclosure. Thereisno built-in fan for theamplifier. Noneisnecessaryunlessyouoperatekey- downmodesforveryextendedperiodsordo quire heavycontestoper- atinginanymode. the M-VFOkey.Ifyoudontwish at the moment to operate on the scratch-

48、padrecalledfre- quency (e.g., an impossible pileup), you can again enter the frequency into the scratch-pad memory and tune around that band or another bard. Thereare nokeys tor receiveortransmitfre- quency offset tuning.Such operations have to be accomplished by using the split-operation feature of

49、 thetwoVFOs (more on that later). Overall, the keypad on the Omni V is very clearly laid out. Basically, allofthe keys have a clearly defined single function. Construction As usual, I couldnt resist taking all of the cov- ersoftthe Omnl-V to see how things looked in- side. The photographs tell most of the story, ThePCboards are well balanced with regard to the amountofcircuitry on each one, and each board is fully serviced by multiple con- nectors so any individual board can easily be removed for possible servicing. The almostto- tal aluminum frame construct