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U70F

Fredenstein U70F User manual

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U70F
Peak Programme Meter
Operating Manual
Rev.2.00 JAN.,2014 byORIONcommunication
Important Safety Instructions
1. Do Not try to service this product yourself! It may expose you to dangerous high
voltage and other risks.
2. Do Not operate this product near water.
3. Do Not place or operate near or over radiator or heat register.
4. Do Not expose this product to dampness, dust or corrosive liquids.
5. Do Not connect this product and Disconnect from wall socket during a lightning or
thunderstorm
6. Do Not obstruct this product ventilation slots, as insufficient airflow may harm this
product.
7. Do Not insert any objects into the openings of the equipment.
8. Plug directly into wall socket (100Vac~240Vac). Do Not use an extension cord
between this product and the AC power source.
9. When plugging this product into wall socket, make sure that electrical socket are
not damaged, and no leakage for gas or water pipes to begin with.
10. Place the connecting cables carefully so people won’t stumble or walk on it.
11. The equipment should be operated from the type of power indicated on the
marking label. If you are not sure of the type of power available, consult the
qualified technician.
12. Unplug the equipment from the mains and refer the product to qualified service
personnel for the following conditions:
• If liquid has been spilled on the product
• If the product has been exposed to rain or water
13. Unplug from the wall socket before cleaning. Use a damp cloth for cleaning. Do not
use liquid cleaners or aerosol cleaners
CAUTION!
The Federal Communication Commission warns the user that changes or modifications to the unit not
expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
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Introduction
CongratulationstoyournewU70F2‐channelPeakProgrammeMeter(PPM).Thenameis
the homage to the first PPM meter called U70, a tube based system developed and
anufacturedinGermanyintheearly50s.Ournewdesignusesadvanced DSP
echnologiesforimprovedperformanceandoffersthefollowingfeatures:
m
t
Î XLRbalancedinputsandoutputs
Î TheaudiopassthroughfeaturesimplifiestheconnectionoftheU70F
Î Independent 60 LED scales with five Illuminated scale markers per channel.
(Nonmultiplexedforflickerfreeoperation)
Î dBlinearscalesforimprovedreadability
Î Switchablescales:39dBto+20dBwithalinearresolutionof1dBperstepor
19.5dBto+10dBwithalinearresolutionof0.5dBperstep
Î SelectableDotorBardisplaycharacteristics
Î Selectable PeakHold functions with hold times of 2.5s or indefinitely with
manualreset
Î Displaymodes:
PPMBarMode,
PPMDotMode,
RMSBarMode,
PPMDotandRMSBarMode(default)operatedsimultaneously
EverymodesupportstheadditionalPeakHoldfeature.
Î Integrateduniversalpowersupply(90–240VAC,50–60Hz)withIECconnector
Î Rackmountortabletopoperation
Î Standard19 inch1U nclosure
PPM metering is more important than ever in modern digital recording since A/D
convertersdonotclipgracefullyatall.VUmeteringistooslowandunabletocorrectly
display transients and other complex waveforms. Monitoring the recording levels after
the A/D conversion in the digital domain cannot show any “overs” and will give false
readings. The U70F offers a high quality solution to these problems, latency free true
over‐sampledpeakmetering.Inaddition,thesimultaneoustrueRMS feature allowsthe
recording/mastering engineer to judge the “loudness” of the program. This especially
importanttoinsuretheprogram willbeon parwithotherswhen playingonradio/TV
stations,internetstreamsorportablemusicplayers.Thepeakholdfeaturewithmanual
resetallowsuserstoreadthemaximumpeakvalueofacompleteprogram.
e
OperatingInstructions:
TheOn/Offswitchislocatedontheback‐panelclosetotheACinlet.Afterturningthe
U70Fon,theinstrumentwillgothroughatestandcalibrationcycle.Firstasingledotwill
ascendandtheninvertanddescend.Theilluminationofthe10greenLEDswillindicate
thesuccessfulcompletionofthiscycleandtheinstrumentisthen ready for normal
operation.
Afailureoftheself‐testand/orthecalibrationwillbelightthe10redLEDs.Inthis
casetheinstrumentwillneedtoberepairedbyFredenstein or an authorized service
epresentative.DonotopenyourselftheU70F,highvoltageispresentinsideandcanleadtoa
otentiallyfatalelectricshock.
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p
AudioI/OConnection
Fig.1BackviewofU70F
TherearetwoaudioI/OchannelsofU70F.EachchannelfeaturesanXLRbalancedinput
andoutputtosimplifytheinsertionoftheU70Fbetweenthesourceandthedestination
equipment.
Standardcalibrationis+4dBu(1.23Vsine‐waveat1kHz)fora0dBmeterreading.The
70FisaPPMcalibratedinRMSvalues.Othercalibrationlevelsareavailableatthetime
fordering.
U
o
OperatingModes
Fig.2FrontviewofU70F
Thefourillum front‐paneldetermine
theoperating
inatedpushbuttonswitchesontherightsideofthe
PEAK
modes(labeledPEAK,HOLD,RANGE,andBAR)
: EngagesthePeakHoldmodewitha2.5sholdtime
HOLD: Engages the Peak Hold mode with manual reset. To reset the peak value
simplyreleasetheswitchandengageitagain.
RANGE:
4
Engages:thehighresolutionmeterrangeof‐19.5to+10dB(0.5dB/step),if
notengagedtherangeis‐39dBto+20dB(1dB/step).
BAR: Engagesthebardisplaymode,ifnotengagedthedotmodeisselected(likea
traditionalU70)
5
earethreeIftheBARswitchisengagedandthendisengagedwithinthreeseconds,ther
nbesequentiallyselected:
PMDotandRMSBarMode(Defaultmodeafterpower‐up)
differentmodesca
a)SimultaneousP
b)PPMDotMode
c)RMSBarMode
ormally, if engage for more than 3 seconds, the
BAR switch toggles between the BarN
ModeandtheselectedDotMode.
TheU70Fisonlydesignedtoworkproperlywithbalancedaudiosignals. Unbalanced
signalswillnotbeabletodrivethemeterabove+4dBonthescale.
fmountinginastandard19”audiorackisdesired,pleaserelease the four feet by
emovingtheircenterscrews.
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TechnicalData:
Inputsandoutputs balancedXLRconnectorswithaudiopass‐through
Insertionloss
0dB
20kHz‐0.25dBFrequencyresponse 20Hzto
PeakAttacktime <10ms
RMSIntegrationtime 330ms
Samplingfrequency
200kHz
1.5s/20dBin1dB/step,2.25s/20dBin0.5dB/stepReleasetime
Maximuminputlevel +28dBu
Inputimpedance
>5kΩ
+4dBu(1.23Vsine‐waveat1kHz)for0dBStandardcalibration
level
reading
C,50–60HzwithIECpower‐cordMains 90–240VA
Powerconsumption
Max.15W
Fuse 0.5AT(5x20Type)
X50mmX140mm
Dimensions(LxHxD)
482mm
1.6Kg
Weight
Packagingcontent:
U70FPPMMeter x1
ountryspecificpowercord x1
peratingManual(English) x1
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AppendixA:
Calibrationmode:
Warning: Only trained qualified personnel may open covers and performs this
procedure.
To calibrate the U70F a precision, balanced output, amplitude jitter‐free sine‐wave
enerator,asmallPhilipsscrewdriver,andaverysmallflat‐head screwdriver areg
necessary.
Step1:Turn‐offthepowerswitchlocatedontheback‐panel.Disconnectthemainscord.
smallPhilipsdriver.
Step2:Openthetop‐coverafterremovingallscrewswitha
Step3:Engageallfourswitchesonthefront‐panel(labeledPEAK,HOLD,RANGE,andBAR)
Step4:Re‐connectthemainscableandturnpowerbackon
Step5:Disengagethetwoswitchesinthemiddle(labeledHOLDandRANGE)duringthe
self‐test and calibration cycle. The U70F will enter calibrationmodeafterthe
completionoftheself‐test.
Step6:Applythedesiredbalancedinputsignal(1kHzsine‐wave),1.23Vfor+4dBuorany
other level between+2dBu and +20dBu. The display will either show all yellow
LEDs(‐39dBto+20dB]illuminatedifthelevelistoolow,allgreenLEDs[‐9dBto
0dB]iftheleveliscorrect,orallredLEDs[+1dBto+10dB]ifthelevelistoohigh.
Step7:AdjusttheLevelcontrolslocatedonthemeterPCBscounter‐clockwiseifthelevel
istooloworclockwiseifthelevelistoohigh.Theleveladjustmentcontroltakes
10turnfrommaximumtominimum,sopleasebepatientandkeepturning.The
.1%(+‐1dBisabout+‐procedureallowsacalibrationaccuracyoflessthana+‐0
10%).
tep8:Pressanybuttontoreturntothenormaloperatingmode.
tep9:Turntheinstrumentoff,disconnectpowerandputthetop‐coverbackon.
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