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FRONT PANEL

7

A    B         C     D          E                             E           D    C        B     A   H

F

G

NOTE: Right channel is a mirror image of the Left

We do this to preserve exact similarity of the audio electronics (path length, PCB layout, etc)

A

IN / BYPASS. Audio still flows through the tubes in BYPASS but at Unity Gain. Switching
to IN provides the Limiting controls and functions. Use this switch to verify that the limiting
is not messing up the original sound but enhancing it or at least levelling the volume.

B

REDUCTION.  Adjusts the amound of limitng in the that channel. This could also be called
Threshold. Turning this clockwise introduces limiting.

C

GAIN  Adjusts the gain of that audio channel. Unity gain is about the seventh marking or 1
o'clock. Limiting usually requires some additional "make-up" Gain to compare IN / BYPASS.
The Gain control can also be used as the level to tape.

D

METER  SELECT  Switch to REDUCTION to see the amount of limiting in dB.  The wider
and quicker the reduction meter swings the more likely the limiting will be audible.
Switch to OUTPUT to show the output level as a conventional VU meter.

E

 METER   Shows  the amound of gain reduction in dB from the 0 dB mark.  Functions as a
high quality VU meter when the switch  is set to METER OUTPUT. Note that VU meters and
PEAK meters rarely agree and that digital recorders use peak meters - Rely on those for clean
recording. VU meters are standard with analog machines and  big consoles because they
correspond well with perceived loudness.

F

STEREO LINK / NORMAL   Switching the toggle UP provides the STEREO LINK. It is
used on stereo tracks so that when either channel is called to limit, both channels reduce the
same amount at the same time. This prevents image shifts and an instrument should stay
where you panned them. Limiting individual sounds is usually done with the switch down
where each side is independent of the other.

G

STEREO ADJUST  Active only in LINK mode. It offers a quick and easy control to adjust
the LEFT / RIGHT BALANCE by few dB. One side increases by 1 dB while the other side
drops by 4 dB. It operates on the input signal before everything.

H

POWER SWITCH  Switch up to turn the unit ON.

Summary of Contents for Langevin ELOP

Page 1: ...S MANUAL LANGEVIN ELECTRO OPTICAL LIMITER MANLEY LABORATORIES INC 13880 MAGNOLIA AVE CHINO CA 91710 TEL 909 627 4256 FAX 909 628 2482 email emanley netcom com http www manleylabs com MANLEY LABORATORI...

Page 2: ...NTENTS SECTION PAGE INTRODUCTION 3 MAINS CONNECTIONS 4 OPERATION NOTES 5 6 FRONT PANEL 7 REAR PANEL 8 TROUBLE SHOOTING 9 10 INTERNAL ADJUSTMENTS 11 SPECIFICATIONS 12 WARRANTY 13 WARRANTY REGISTRATION...

Page 3: ...unreliable We also use a solid state side chain to drivetheLEDs TheLimiteralsofeaturesaBYPASSswitchthatretainsthetubesectionatunitygain as well as an innovative BALANCE control to fine tune the stereo...

Page 4: ...king identifying the terminals in your plug proceed as follows The wire which is coloured GREEN YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety ea...

Page 5: ...se our Langevin line amplifier circuit which we also use in the Langevin Enhanced Pultec Equalizers rather than copy UREI designs because frankly our circuit sounds better and cleaner Back to this mat...

Page 6: ...able tone of the drum is diminished If used gently this can be applied to brighten up the attack of the drum but it is difficult to apply in practice because drums can be very dynamic One great use is...

Page 7: ...ikely the limiting will be audible Switch to OUTPUT to show the output level as a conventional VU meter E METER Shows the amound of gain reduction in dB from the 0 dB mark Functions as a high quality...

Page 8: ...IN 1 GROUND PIN 2 HOT PIN 3 GROUND H 1 4 INPUT BALANCED LEFT TIP HOT SLEEVE GROUND I XLR OUTPUT BALANCED RIGHT PIN 1 GROUND PIN 2 HOT PIN 3 GROUND J 1 4 INPUT UNBALANCED RIGHT TIP HOT SLEEVE GROUND Us...

Page 9: ...happens you will only be getting 1 2 the signal which means that you lost 6 dB There is a trick if you just want to use the XLRs but from time to time feed unbalanced inputs Insert a 1 4 mono tip slee...

Page 10: ...pegs the meters Some of you know already what s going on That 6 level is referenced to digital full scale and the computer might have 18 or 18 5 or 20 dB of headroom built in That 6 level on the oscil...

Page 11: ...eduction mode Meter switches to REDUCTION Adjust for 0 VU on the Meters 8 9 This adjusts the meter in Reduction mode to reflect the actual gain reduction accurately You will probably need to increase...

Page 12: ...to 70 kHz 0 5 dB THD Noise 1kHz 4 dBm 015 Noise Floor Gain set to minimum 80 dB Wideband Signal to Noise 126 dB typical Maximum Gain 15 dB Maximum Limiting 22 dB Maximum Limiting with 4 dBm sine 15 d...

Page 13: ...rwarrantyregistrationcard IfaManleyLaboratories productfailstomeettheabovewarranty thenthepurchaser ssole remedyshallbetoreturntheproducttoManleyLaboratories wherethedefectwillberepaired withoutcharge...

Page 14: ...No ______________________ PURCHASE DATE ______________ SUPPLIER ______________________ PLEASE DETACH THIS PORTION AND SEND TO MANLEY LABORATORIES MODEL LANGEVIN ELECTRO OPTICAL LIMITER SERIAL No _____...

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