Kenwood FL-180A User manual

© PRINTED IN JAPAN B50-7693-00
96009(N)
KENWOOD
WOW FLUTTER METER
FL-180A
INSTRUCTION MANUAL
KENWOODCORPORATION

WOW FLUTTER METER FL-180A
The FL-180A wow flutter metermeasureswowand flutter ofvarioustypesofsound
recordingmachines,videorecordingmachinesandmanyotherrotarymachinessuch
as taperecorders, VTR's andturntablesinaccordance with theJIS (Japan), NAB
(U.S.A), CCIR (France) andDIN(Germany)standards.
Before using,pleasereadthisinstructionmanualcarefullytoinsurethemaximum
performanceandtrouble-freeoperationofyour FL-180 A
CONTENTS
FEATURES ••••3
SPECIFICATIONS • 4
PANEL CONTROLS AND THEIR FUNCTIONS 6
Front panel• 6
Rear panel••••••• ••••••9
PRECAUTIONS • • ..10
OPERATIONS • 11
Preparation foroperation••••11
Operatingprocedures• • 11
Operationofwow flutter meter• 11
Output terminalon Rear Panel • 12
Operationoffrequencycounter• 13
MAINTENANCE • • • 14
2

FEATURES
•Minimumoperating input voltageisaslowsas0.5mV,permitingmeasurements
ofwowand flutter directly from a small output tapeheadorPHONOcartridge.
•The FL-180 A hasa widerangeofmeasurementrange(0.003to10%)andis
ready foruse with professionaltyperecordersandotherrotarymachines.
•RMSvalues (JIS), meanvalues(NAB)andpeakvalues (CCIR/DIN) canbe
directlyreadaccordingtointernationalstandards.
•Combinationofwowand flutter, weightedorunweighted,canbemeasuredon
the basis ofDINstandards.Itisalsopossibletomeasurewowand flutter
separately.
•Highstabilitycrystaloscillatorsareincorporatedtoprovide3 kHzand3.15kHz
as recordingsignalsource.
• Besides measuringwowand flutter, the FL-180 A alsoindicatesthefrequency
ona 4-digit frequencycounter.
The frequencycounterreferencetimecanbeusedforcrystalcontroland
selectionofACpowerfrequency(50/60Hz).
•The FL-180 A canbeswitchedtooperateasa frequencycounter.
•Flickeringofthe monitor lampallowswowand flutter measurement without
adjustingthe input levelandfrequency.Ifthe FL-180 A isusedasa frequency
counter,the monitor lampflickerswhen input frequencyexceeds9.999kHz
(gatetime: 1 sec),indicatingoverflowofthefrequency.
If input frequencyexceeds55kHz(gatetime: 0.1 sec.), the monitor lamp
goes out,indicatingthatthefrequencyisoutofthemeasurementrange.
•ACandDCvoltage output terminalsareprovidedforconnectinga frequency
analyzer suchasoscilloscope,penrecorder, digital memoryscopeorFFT
analyzer toobservewaveformsandanalyzefrequencies.ACvoltageis
proportional towow flutter andDCvoltage proportional towow flutter andthe
speed ofrevolution.
3

SPECIFICATIONS
Wow flutter metersection
Measuringcenterfrequency:
Within 3 kHz± 300 Hz(JIS, NAB, CCIR)
Within 3.15kHz+300Hz(DIN)
1 nput level: 0.5mV—100mV,5 mV—30V,tworanges
Input impedance:
300 kO+ 20%,unbalanced
Wow flutter measurement
range:
0.003-10% (5mV~30Vrange)
f U 1 O I IMUO
0.01-10% (0.5mV~100mVrange)
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: 0.5-6Hz(-3dB±1dB)
(JIS/NAB)
0.3~6Hz(-3dB±1 dB) (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)
More than200Hz; morethan-15dB/oct (JIS/NAB)
Less than0.3Hz; morethan-6dB/oct (CCIR/DIN)
More than200Hz; morethan-15dB/oct (CCIR/DIN)
Maximum input voltage:
100V (DC+ACpeak)
1 nput monitor :
Level monitor lampONatmorethan0.5mV/5mV
of input
Frequency countersection
Measuringfrequencyrange: 0.01-55.00kHz(gate
time : 0.1s)
0.010—9.999kHz(gate time : 1s)
1 nput level: lOOmVrms— 30Vrms
1 nput impedance:
300kO + 20%(unbalanced)
Countingcapacity: Decimalsystem,
4-digit LEDmemorydisplay
Reference time :
Reference time frequency:
10.080 MHz (built-in crystal)
AC powerfrequency(AClinepower)
Reference time frequency
accuracy :
+ 5x10~5(0—40°C) (built-in crystal)
Refer toACpowersupplyaccuracy.(AClinepower)
Gate time :
1 s,0.1s
4

* Circuitandratingaresubjecttochange without noticedueto
developmentsintechnology.
Measurementaccuracy: ±(1
digit + reference time accuracy)
Maximum input voltage:
100V (DC+ ACpeak)
1 nput monitor :
Level monitor lampgoesonat100mV input ormore.
(Flickers if input frequencyexceeds"9.999kHz" with
the GATE TIME button released.Turnsoffif input
frequencyexceeds55.00kHzbeyondthemeasurement
range with the GATE TlME button depressed.)
Outputterminals
Recording output signal
Signal frequency:
3 kHz,3.15kHz
Accuracy :
+ 5X105
Output voltage: 0.2Vrms+20%(open
output)
Output impedance: 600 0+20% (unbalanced)
Distortionfactor:
Less than1 % (6Q0O terminated)
Drift output terminal (DRIFT)
Output voltage: Approx.DC+ 1 V,foreach+
1 % offrequency drift
Output impedance:
600X1+ 20%(unbalanced)
Scope output terminal(TO SCOPE)
Output voltage: Approx.3Vrmsof
full seale
Output impedance: 600 0 + 20% (unbalanced)
Recorder output terminal (RECORDER)
Output voltage: Approx.DC1 V of
full scale
Output impedance: 6000+ 20%(unbalanced)
Power requirements
Voltage:
AC 100/120/220+ 10%,216V-250V,50/60Hz
Power consumption: Approx.14W
Operatingtemperature
0-40TC
Dimensions
Width 260mm
( ) dimentionsinclude Height150mm(171)
protrusion from basic Depth305mm(360)
outline dimentions.
Weight Approx.5.2kg
Accessories
Connectingcord with plugsandclips
(CA-36) 1 piece
AC cord••••••1 piece
Instructionmanual1 copy
Replacement fuse
(0.5 A)••••••••••2 pieces
(0.3 A)••••2 pieces
5

PANEL CONTROLSANDTHEIRFUNCTIONS
Fig. 1 Frontpanel
FrontPanel
(DPOWER
Power switch. Press ( j») the pushbutton switchandthe 4-digit frequency
displayLED® indicates"0000"(noinput).The FL-180 A isreadyfor
operation.
©OSC(JIS,NAB,CCIR/DIN)
Recordingsignalselectswitch. Press ( m. ) the pushbutton switchand3.15kHz
signal(DIN)isavailableattheOSC OUTPUT (3).Byreleasing(JL)theswitch,
3.0kHz(JIS,NAB, CCIR) signalis obtained attheOSC OUTPUT (3).
Note :
Whenmeasuringwowand flutter ofeachstandard,thisswitchshouldsetto
theappropriatestandard.
(3) OSCOUTPUT
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 thepushbuttonswitchandthemeter@ willindicatea meanvalueof
NAB standard.
®INDICATION(CCIR)
Press thepushbuttonswitchandthemeter@ willindicatea peakvalueof
CCIR standard.
(7) INDICATION(DIN)
Press thepushbuttonswitchandthemeter® willindicatea peakvalueof
DINstandard.
®FUNCTION(WTD)
This switchisusedtoselectthefrequencycomponentcontainedinwowand
flutter tobemeasured.Bypressingthepushbuttonswitch,weightedwowand
flutter ofeachstandardaremeasured.
(9)FUNCTION(WOW)
By pressingthepushbuttonswitch,wow with frequencycomponentof0.5~6Hz
(0.3-6 Hz)(-3dB)canbemeasured.[ ( ) for CCIR/DIN ]
©FUNCTION (FLUTTER)
By pressingthepushbuttonswitch, flutter with frequencycomponentof6~200
Hz (~3dB)canbemeasured.
®FUNCTION(UNWTD)
By pressingthepushbuttonswitch,wowand flutter on0.5~200Hz(0.3~200Hz)
bandcanbemeasured.[ ( ) for CCIR/DIN ]
©INPUT
Inputterminalformeasuringwow flutter andfrequency.
The input impedanceis300kO,andthemaximum input voltageis100V(DC+
AC peak).
@ LEVEL
I nput sensitivityselectswitchformeasuringwowand flutter. Press (JB.)the
pushbuttonswitchandwow flutter canbemeasured with morethan5mV input
voltage. Release ( JL)theswitchtomeasurewowand flutter with morethan
0.5 mV input.
©MODE
This switchisusedtoselectthemodeofmeasurement; wow flutter or
frequency.
Press thepushbuttonswitchandthe FL-180 A 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 seale.
7

© GATE TIME
This pushbutton isusedtoselectthegatetime.
Press this pushbutton (button engaged)tosetthegate time to0.1secondand
themeasurementrangeto00.01to55.00kHz.
Press itagain (button released)tosetthegate time to1 secondandthe
measurementrangeto0.010to9.999kHz.
© OVERFLOW/LEVEL MONITOR
Duringmeasurementofwow flutter, the monitor lampwiII light whenan input
signalofspecifiedlevel(selectedby LEVEL ©)andfrequency(3kHz,3.15kHz)
±300Hzispresent.
Duringmeasurementoffrequency,thislamp will also light whena signalof
specified input level(morethan100mV)ispresent.
The lampflickerswhen input frequency exceeds 9.999kHz with the GATE TlME
button released(gate time : 1 second),indicatingoverflowofthefrequency.
Itgoesoutwhen input frequency exceeds 55.00kHz with the GATE TlME
button depressed(gate time : 0.1second),indicating that thefrequencyisout
ofthemeasurementrange.
Note :
The lampflickersmomentarilyatthe time ofpowerON. This isnormaland
is notanindicationoftrouble.
® FREQUENCY
The 4-digit redLEDindicatesthefrequency during wow flutter orfrequency
measurement.
®CarryingGrip
Use this grip whencarryingthe FL-180 A
® Meter
This meterindicateswow flutter fordirectreading.Itprovidestwo full scale
readingsof"10"and"3"whichcorrespondtoeach position ofthe RANGE switch© .
Ifthemeterisnotzeroedmechanically,adjustit with a standardscrewdriver.
@>Stand
This standcanbelockedby pulling inthe"arrow"direction(seeFig.2).
Fig. 2 Useofauxiliary foot
8
Stand

Rear Panel
Fig. 3 Rear panel
@ CordReel
This cordreelisusedtostorethepowercordforcarryingconvenience.
® Fuse Holder
A 0.3A fuseisusedforoperatingthe FL-180 A on220V or240V ACpower.
For operationon100Vor120V,itshouldbereplacedwitha 0.5A fuse.
Note:
Never usea fusewithdifferentcurrentrating.
®PowerConnector
AC powerconnector.UsethesuppliedACcord.
®PowerSelectorSwitch
Set thisswitchtothecorrectpowervoltage.
@ GNDTerminal
Groundterminal.
Note:
Before using,the FL-180 A mustbeproperlyearthed.Improperearthingcan
result inelectrical shocks.
@ TO SCOPE
AC voltageproportionaltowow flutter isavailableatthisterminal.The output
voltageisabout3V full scale andthe output impedanceisabout 600X1. Used
forobservingwaveformsoranalyzingfrequencies.
@ DRIFT
Drift output terminal.Thefrequency drift isaboutDC+ 1 V for+1%andthe
output impedanceisabout 600X1. . The output voltageisproportionaltothe
speed ofrevolutionofequipmentundertest.
9

® RECORDER
This terminalprovidesDCvoltageproportionaltometerreadingduring
measurement ofwow flutter. The output voltageisabout 1 V full scale andthe
output impedanceis6000.
© REFERENCE FREQUENCY
This switchisusedtosetthefrequencycounterreferencetimeforcrystal
controlorACpowersynchronization.
50 Hz— For50Hz areas
60 Hz—For60Hz areas
CRYSTAL — Crystalcontrol
®VoltageNameplate
Use specifiedpowervoltageand fuse.
PRECAUTIONS
1. Donotexposethe FL-180A todirectsunlight.Notethat excessive temperature
rise resultsinunstableperformanceordamagestransistorsandIC's.
2. Avoidusingthe FL-180 A inlocationswithhightemperatureandhumidity.
3. Usethe FL-180 A invibration-freelocations.Vibrationcan cause misoperation.
4. ACpowerfluctuationshouldbewithin± 10%oftheratedvoltage(MAX. 250V).
Power frequencyis50/60Hz.
5. BeforethepoweristurnedON,checkthemechanicaIzero point ofthemeter.
6. The FL-180 A shouldbeusedundertemperaturesof0 to40 "C.
7. Inmeasuringwow flutter, confirmtheapplicablestandardandcondition.
8. Themaximuminputvoltageis100V(DC+ AC peak). Donotapplya volya
voltagein excess ofthis limit. Neverconnectexternalvoltagetothe output
terminals.
9. Topreventelectrical shocks, besuretoconnecttheGNDterminal(see©on
therearpanel)toanappropriateearth point.
10. Whenmeasuringwow fitter, the FL-180 A mustbep laceduprightly; otherwise,
accurate measurementscannotbeobtained.
10