Kenwood FL-180 User manual

FL-180
WOW FLUTTERMETER
INSTRUCTION MANUAL

WOW FLUTTER METER FL-180
The FL-180 wow flutter metermeasureswowand flutter ofvarioustypesofsound
recordingmachines,videorecordingmachinesandmanyotherrotarymachinessuch
as taperecorders, VTR's andturntablesinaccordance with the JlS(Japan), NAB
(U.S.A), CCIR(France) andDIN(Germany)standards.
Before using,pleasereadthisinstructionmanualcarefullytoinsurethemaximum
performanceandtrouble-freeoperationofyour FL-180.
CONTENTS
FEATURES 3
SPECIFICATIONS...................................4
PANEL CONTROLS AND THEIR FUNCTIONS 6
Frontpanel6
Rear panel9
PRECAUTIONS................................................................. 10
OPERATIONS 11
Preparationforoperation11
Operatingprocedures11
Operationofwow flutter meter11
Output terminalon Rear Panel 12
Operationoffrequencycounter13
MAINTENANCE AND ADJUSTMENT 14
Maintenance14
Adjustment 1 5
2

FEATURES
m Minimumoperating input voltageisaslowsas0.5mV, permitting measurements
ofwowand flutter directly from a small output tapeheadorPHONOcartridge.
•The FL-180 hasa widerangeofmeasurementrange(0.003to10%)andisready
foruse with professionaltypetaperecordersandotherrotarymachines.
•RMSvalues (JIS), meanvalues(NAB)andpeakvalues (CCIR/DIN) canbedirectly
read accordingtointernationalstandards.
©Combinationofwowand flutter, weightedorunweighted,canbemeasuredon
the basis ofDINstandards.Itisalsopossibletomeasurewowand flutter sepa-
rately.
•Highstabilitycrystaloscillatorsareincorporatedtoprovide3 kHzand3.15 kHzas
recordingsignalsource.
• Besides measuringwowand flutter, the FL-1 80alsoindicatesthespeedofrevo-
lution ona 4-digit frequencycounter..
The frequencycounterreferencetimecanbeusedforcrystalcontrolandselection
ofACpowerfrequency(50/60Hz).
•The FL-1 80canbeswitchedtooperateasa frequencycounter.
• Adoption of monitor lampallowsmeasurementsofwowand flutter without
adjusting input leveland input frequency.The monitor lampflickerswhenthe
input frequencyofthefrequencycounterexceeds"9999Hz",indicatingan
overflowoffrequency.
•ACandDCvoltage output terminalsareprovidedforconnectinga frequency ana-
lyzer suchasoscilloscope,penrecorder, digital memoryscopeor FFT analyzerto
observe waveformsandanalyzefrequencies.ACvoltageis proportional towow
flutter andDCvoltage proportional towow flutter andthespeedofrevolution.
3

SPECIFICATIONS
4
Wow flutter metersection
Measuringcenterfrequency: Within3 kHz±300Hz
(JIS, NAB, CCIR)
Within3.15kHz±300Hz(DIN)
Inputlevel:
0.5 mV~ 100mV,5 mV— 30V,tworanges
Inputimpedance:
300 kfi±20%,unbalanced
Wow flutter measurement
range:
0.003 ~ 10%(5mV~ 30Vrange)16r n es
0.01~ 10%(0.5mV~ 100mVrange)}ranges
Display system:
RMS value (JIS)
Meanvalue(NAB)
Peak value (CCIR, DIN)
Display accuracy:
±5% of full scale (at4 Hz)
Frequency response:
Weightedcharacteristic: Inaccordance
with JIS, NAB, CCIR/DIN
(at 0.2- 200Hz)
Wowcharacteristic:
0.5 ~ 6 Hz (-3dB±1dB) (JIS/NAB)
0.3 ~ 6 Hz (-3dB±1dB) (CCIR/DIN)
Fluttercharacteristic:
6 ~ 200Hz (-3dB±1dB)
Unweightedcharacteristic:
0.5 - 200Hz(-3dB±1dB) (JIS/NAB)
0.3 ~ 200Hz (-3dB±1dB) (CCIR/DIN)
Roll off:
Less than0.5Hz;morethan-6dB/oct (JIS/NAB)
Morethan200Hz;morethan- 1 5 dB/oct (JIS/NAB)
Less than0.3Hz;morethan-6dB/oct (CCIR/DIN)
Morethan200Hz;morethan- 1 5 dB/oct (CCIR/DIN)
Maximum input voltage:
100V (DC+ ACpeak)
Input monitor:
Level monitor lampONatmorethan0.5mV/5mV
of input
Frequency countersection
Measuringfrequencyrange:
10 ~ 9999Hz
Inputlevel:
100 mVrms~ 30Vrms
Inputimpedance:
300 kO±20%(unbalanced)
Countingcapacity:
Decimal system, 4-digit LEDmemorydisplay
Reference time:
Reference timefrequency:
10.080 MHz (built-in crystal)
AC powerfrequency(AClinepower)
Reference timefrequency
accuracy:
±5x 105(0~40°C) (built-in crystal)
Refer toACpowersupplyaccuracy.(AClinepower)
Gate time:
1 sec.
Measurementaccuracy: ±(1
digit + referencetimeaccuracy)
Maximum input voltage:
100V (DC+ ACpeak)
Input monitor.
Level monitor lampONatmorethan100mVof
input (flickersatmorethan"9999Hz")

5
Signal frequency:
3 kHz,3.15kHz
Accuracy:
±5x10~5
Output voltage: 0.2Vrms±20%(open
output)
Output impedance: 60012±20%(unbalanced)
Distortion factor:
Less than1%(6000terminated)"\ " "
Drift output terminal (DRIFT)
Output voltage: -Approx.DC±1V,foreach±1%offrequency
drift
Output impedance: 6000±20%(unbalanced)
Scope output terminal(TO SCOPE)
Output voltage: Approx,3Vrmsof
full scale
Output impedance: 6000±20%(unbalanced)
Recorder output terminal (RECORDER)
Output voltage: Approx.DC1Vof
full scale
Output impedance: 6000±20%(unbalanced)
Powerrequirements
Voltage:
AC 100/120/220/240V±10%,50/60Hz
Power consumption: Approx.
1 4W
Operatingtemperature: 0~ 40°C
Dimensions:
Width 260mm
Height 1 50mm
Depth318mm
Weight: Approx.5.3kg
Accessories:
Connectingcord with plugsandclips
(CA-36) 1 piece
AC cord..................................................................1 piece
Instructionmanual1 copy
Replacementfuse'
(0.5A)... 2 pieces
(0.3A) 2 pieces
Outputterminals
Recording output signal

PANEL CONTROLSAMDTHEIR FUNCTIONS
Fig. 1 Frontpanel
FrontPanel
® POWER
Power switch. Press ( JBL ) the pushbutton switchandthe 4-digit frequency
displayLED© indicates"0000"(noinput).The FL-180 isreadyforopera-
tion.
(2) OSC(JIS,NAB, CCIR/DIN)
Recordingsignalselectswitch. Press (JHL) the pushbutton switchand3.15 kHz
signal(DIN)isavailableattheOSC OUTPUT (3). Byreleasing(JL)theswitch,
3.0kHz(JIS,NAB, CCIR) signalis obtained attheOSC OUTPUT (3)
Note:
Whenmeasuringwowand flutter ofeachstandard,thisswitchshouldbesetto
theappropriatestandard.
(DOSC OUTPUT
Recordingsignal output terminal.A sinewavesignalofthefrequencyselected
bytherecordingsignalselectswitch(2)is outputted. The output voltageis200
mVrms, output impedanceis600ohmand distortion factoris1%.Selectthe
desiredstandardwhenmeasuringwowand flutter ofa taperecorder,etc.
®INDICATION(JIS)
Standardselectswtichformeasuringwowand flutter. Press the pushbutton
switchandthemeter@ will indicateRMSvalueofJISstandard.
6

©INDICATION(NAB)
Press the pushbutton switchandthemeter@ will indicatea meanvalueof
NAB standard.
(D INDICATION (CCIR)
Press the pushbutton switchandthemeter© will indicatea peakvalueof
CCIR standard.
©INDICATION(DIN)
Press the pushbutton switchandthemeter@ will indicatea peakvalueof
DINstandard.
(D FUNCTION(WTD)
This switchisusedtoselectthefrequencycomponentcontainedinwowand
flutter tobemeasured.Bypressingthe pushbutton switch,weightedwowand
flutter ofeachstandardaremeasured.
(9) FUNCTION(WOW)
By pressingthe pushbutton switch,wow with frequencycomponentof0.5~ 6
Hz (0.3~ 6 Hz)(-3dB)canbemeasured.|() for CCIR/DIN]
®FUNCTION (FLUTTER)
By pressingthe pushbutton switch, flutter with frequencycomponentof6 ~
200 Hz(— 3 dB)canbemeasured.
©FUNCTION(UNWTD)
By pressingthe pushbutton switch,wowand flutter on0.5~ 200Hz(0.3~
200 Hz)bandcanbemeasured.[() for CCIR/DIN]
©INPUT
Input terminalformeasuringwow flutter andfrequency.
The input impedanceis300k!2,andthemaximum input voltageis100V(DC+
AC peak).
© LEVEL
Input sensitivityselectswitchformeasuringwowand flutter. Press (m)the
pushbutton switchandwow flutter canbemeasured with morethan5 mV input
voltage. Release (1)theswitchtomeasurewowand flutter with morethan0.5
mV input.
©MODE
This switchisusedtoselectthemodeofmeasurement;.wow flutter or
frequency.
Press the pushbutton switchandthe FL-180 functionsasa frequencycounter
covering10.~9999Hz. Release theswitchtomeasurewowand flutter.
© RANGE
This switchisusedtoselectthewow flutter measurementrange.Itselectsa
maximumof6 ranges,0.03%,0.1%,0.3%,1%,3%and10% full scale.
7

16 OVERFLOW/LEVEL MONITOR....' . ,-
Duringmeasurementofwow flutter, the monitor lampwill- light whenan input
signal ofspecifiedlevel(selectedby LEVEL (Q)) andfrequency(3kHz,3.15
kHz) ±300Hzispresent.
-Duringmeasurementoffrequency,thislampwill also light whena signalof
specified input level(morethan100mV)ispresent.Thelampflickerswhenthe
input frequencyismorethan9999Hz,indicatinganoverflowfrequency.
Note:
The lampflickersmomentarilyatthetimeofpowerON. This isnormalandis
notanindicationoftrouble.
17 FREQUENCY
^The 4-digit, redLEDdisplayindicatesthefrequencyofwow flutter being measu-
red. Themaximumreadingis "9999". • • • ••
18 CarryingGrip
Use this grip whencarryingthe FL-180.
19 Meter
This meterindicateswow flutter fordirectreading.Itprovidestwo full scale
readingsof"10"and"3"whichcorrespondto each positionofthe RANGE
switch(B).
20 Stand
This standcanbelockedby pulling inthe"arrow"direction(seeFig.2).
Fig. 2 Useofauxiliary foot
8

Rear Pane!
21 Cord Reel
This cordreelisusedtostorethepowercordforcarryingconvenience.
22 Fuse Holder
A 0.3Afuseisusedforoperatingthe FL-180 on220Vor240VACpower.For
operationon100Vor120V,itshouldbereplacedwitha 0.5A fuse.
Note:
Never usea fusewithdifferentcurrentrating.
23 PowerConnector
AC powerconnector.UsethesuppliedACcord.
24 PowerSelectorSwitch
Set thisswitchtothecorrectpowervoltage.
25 GNDTerminal
Groundterminal.
Note:
Before using,the FL-180 mustbeproperlyearthed.Improperearthingcan
result inelectrical shocks.
26 TO SCOPE
AC voltageproportionaltowow flutter isavailableatthisterminal.The output
voltageisabout3V full scale andthe output impedanceisabout6000.Used
forobservingwaveformsoranalyzingfrequencies.
9
Fig. 3 Rear panel

27 DRIFT ,
Drift output terminal.Thefrequency drift isaboutDC±1Vfor±1%and
the output impedanceisabout6000.The output voltageisproportionaltothe
speed ofrevolutionofequipmentundertest.
28 RECORDER
This terminalprovidesDCvoltageproportionaltometerreadingduring measu-
rementofwow flutter. The output voltageisabout1V full scale andthe output
impedance:is 6000.
29 REFERENCE FREQUENCY
This switchisusedtosetthefrequencycounterreferencetimeforcrystal
controlorACpowersynchronization.
50 Hz— For50Hz areas
60 Hz— For60Hz areas
CRYSTAL — Crystalcontrol
30 VoltageNameplate
Use specifiedpower.voltageand fuse.
PRECAUTIONS
1. Donotexposethe FL-180 todirectsunlight.Notethat excessive temperature
rise resultsinunstableperformanceordamagestransistorsandIC's.
2. Avoidusingthe FL-180 inlocationswithhightemperatureandhumidity.
3. Usethe FL-180 invibration-freelocations.Vibrationcan cause misoperation.
4. ACpowerfluctuationshouldbewithin±10%oftheratedvoltage.Power
frequencyis50/60Hz.
5. BeforethepoweristurnedON,checkthemechanicalzero point ofthemeter.
6. The FL-180 shouldbeusedundertemperaturesof0 to40°C.
7. Inmeasuringwow flutter, confirmtheapplicablestandardandcondition.
8. Themaximuminputvoltageis100V(DC+ AC peak). Donotapplya voltagein
excess ofthis"limit.Neverconnectexternalvoltagetothe output terminals.
9. Topreventelectrical shocks, besuretoconnecttheGNDterminal(see@ on
therearpanel)toanappropriateearth point.
10. Whenmeasuringwow flutter, the FL-180 mustbeplaceduprightly;otherwise,
accurate measurementscannotbeobtained.
10