DRAKE FS-4, Instruction Manual

Page 1: ...m MODEL FS 4 v FRRE uEIvc Y SYA THEg IZEtrI...

Page 2: ...original container or equ valent fully nsureda td shipping chmgesprepatd Conect maintenance repair ond use are important to obtain proper perform ance from this product Thoefore carefully read the Ins...

Page 3: ...n signalsfor the R4 series and T4X seriesin 0 5 MHz stepsfrom 11 1through 40 6MHz and the readout is rect An accessorykit is available to provide proper injection signalsfor the SPR4 receiver The FS4...

Page 4: ...pera on Illustratesand describes front panelcontrols and describes operationwith Drakereceiver transmitter equipment Theoryof Operation Describes all circuitsandnetworks Maintenance Provides niaintena...

Page 5: ...the accessory crystal socket of the receiver transmitter This length allowsthe userto placethe FS 4on eithersideof the receiver transmitter Placingthe FS4 on top of the transmitter is not recommended...

Page 6: ...t Em v o E e o a L f o f e G o c R tr s q a s o il v I l il o ul I H I A J ts 3 u o F Y o il E H F g 1 t z F I N ti6t 4...

Page 7: ...The receiver or transmitter wlll operate bestwhenthecenter conductor isconnected to theemitterofthe crystaloscillator Thiscanbedetermined by notingtheSmeterreading or poweroutput readout whentheinject...

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Page 9: ...n thereceiver transmitter instruc tionmanual 3 6 MODIFICATION OFTHEFS 4 FORUSEW THTHESpR 4 or 2 C The FS4 canbemodifiedfrom the standard versionto operateproperly with the SPR 4or 21 by simply removin...

Page 10: ...lways readson the black scale The red scaledoesnot apply when using the FS4 3 7 FREOUENCYACCURACY All injection frequenciesin the Fs4 arederivedfrom the 5 MHz clock and the r ference oscillator Any fr...

Page 11: ...d oscillatorto producean output in the frequencyrangeof approximately1I to l6 MHz 4 4 LOCKEDOSCILLATOR The lockedoscillatordevelops signals of 5 10 l5 2O and 25 MHzwhich are synchronizedto a 5 MHz ref...

Page 12: ...uci u r i o d I N E o N l v l s F Y o s t n t d e 9 I o X H E 1 0...

Page 13: ...o producean out put near0 5 MHz The output is appliedto the phase frequency detector where it is comparedin phaseand frequency with the resultant 0 5 MHz signal obtained by dividing the 5 MHz clock by...

Page 14: ...ollowing is an example of actual signalspresent for the FS 4 setat a dialsettingof l2 5MHz Dialsetting 12 5MHz VCOFrequency 23 6 Locked Oscillator l0 MHz D Bal MixerOutput 23 6 lO 13 6 Second MixerOut...

Page 15: ...s greater accuracy as the aboveprocessprovidestuning of the 5 MHz clock by tuning in a harmonic 5 3 REFERENCE OSCILLATOR ALIGNMENT For a high degreeof accuracythe referenceoscillator should be tuned u...

Page 16: ...PARENT BOARD A400 DIGITAL BOARD A300 c303 v v L203 t204 LOCKED OSCI LLATOR BOARD R EF E R E N C E CRYSTAL L202 L201 L205 L101 L102 1103 1104 Ll 05 L107 Figure 5 1 Top View with CaseRemoved L106 14...

Page 17: ...most dial settings the oscillatormay be alignedby monitoringthe control line voltageunder lockedconditions FREQUENCY COT JNTER METHOD Disconnect the control line cable at the VCO board and apply a wel...

Page 18: ...o not disconnect the control line asin the methodabove Connecta DCvolt meterto the controllineat theVCOboardandtunetheindicated coil for thespecified controllinevoltage DIAL SETTING CONTROLLINE TI NE...

Page 19: ...er built for use with R 4 ser es SPR 4 2 C receivers and T 4X seriestransmitters MN 4 Antenna Match ngNetwork matches50 Ohm tansmitter output to coax antennafeedl ne with VSWRup to 5 1 An integral W a...

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