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LEHLE GmbH · Germany · www.lehle.com · [email protected]

BALANCED SIGNAL ROUTING

Balanced signal lines are used to cross
larger distances without interference.
They are generally fitted with XLR connec-
tors or TRS (Tip Ring Sleeve) jack plugs.

Here, three cores are required:
there are two signal conductors. In a bal-
anced signal line, the signal is present in
phase at the tip, as in the case of an un-
balanced signal line (XLR Pin 2).
The second signal conductor carries the
same signal, but with the opposite polar-
ity or mirror-image phase (Ring, XLR Pin
3).
The third conductor is the screening,
and again constitutes the signal ground
(Sleeve, XLR Pin 1).

BALANCED SIGNAL ROUTING

JACK

XLR

Cable

Sleeve

Pin 1

Ground

Ring

Pin 3

Signal in mirrored phase

Tip

Pin 2

Signal in phase

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Содержание 1027

Страница 1: ...OPERATING INSTRUCTIONS P SPLIT III ...

Страница 2: ...IT III comprises only the very best components Every assembly of your LEHLE P SPLIT III has been made and tested in Germany Your LEHLE P SPLIT III is of extremely ro bust design and construction to make sure that you get absolutely years and years of enjoyment from it If you should nonetheless have a problem or simply a question just mail me or a member of the Lehle team at support lehle com I wis...

Страница 3: ...ssive splitting General description Typical uses of the LEHLE P SPLIT III as splitter for two amps compact passive DI box line isolator the universal cure for hum loops recording splitter reamplification box balanced unbalanced signal converter passive summing box for stereo signals LEHLE P SPLIT III signal flow diagram 4 6 6 7 8 10 13 14 15 16 18 19 21 22 ...

Страница 4: ... for the LEHLE P SPLIT III is splitting an input signal to two outputs enabling you to connect an in strument to two devices which may for example be two amplifiers or an amp and a mixer recording unit PC DAW Thanks to its ability to pick off the bal anced signal on the ISO output the LEH LE P SPLIT III is also eminently suitable for use as a high quality compact DI box for all types of signal Ano...

Страница 5: ...DATA Weight 375 g 3 55 3 6 1 45 20 dBu THD 1 50 Hz 20 kHz 0 003 0 dBu 1 kHz min 2 MΩ at 2 kHz 20 Hz 100 kHz 0 1 0 4 dB source 600 Ω load 1 MΩ Length Width Overall height Max Level Total harmonic distortion Frequency range Input impedance transformer load impedance ...

Страница 6: ...ignal lines have two conducting cores The signal itself is present on the signal conductor and is connected to the tip of the jack plug The second core which is connected to the sleeve of the jack plug screens the signal conductor and constitutes the sig nal ground UNBALANCED SIGNAL ROUTING Tip Signal in phase Sleeve Ground JACK JACK Cable Sleeve Sleeve Ground Tip Tip Signal in phase ...

Страница 7: ...o signal conductors In a bal anced signal line the signal is present in phase at the tip as in the case of an un balanced signal line XLR Pin 2 The second signal conductor carries the same signal but with the opposite polar ity or mirror image phase Ring XLR Pin 3 The third conductor is the screening and again constitutes the signal ground Sleeve XLR Pin 1 BALANCED SIGNAL ROUTING JACK XLR Cable Sl...

Страница 8: ...or a signal input and thus defines its low high impedance perfor mance High impedance signals are generally transmitted unbalanced and are relative ly susceptible to interference Long cable routings audibly attenuate high frequen cies Electromagnetic interference from the environment then becomes more no ticeable than in the case of low imped ance and balanced signals There are nonetheless very ma...

Страница 9: ...igh impedance inputs behind this if you wish there won t be any problems WHAT IS NOT POSSIBLE Audible sound losses will occur if you use long cable routings from the passive gui tar to the splitter and from the splitter to the amps The sum of all cable lengths to the splitter and to the amps should gener ally not be more than 10m Your individual taste will ultimately de cide however Splitting your...

Страница 10: ... input signal remains connected to the ISO and DIR outputs at all times with no semiconductors or any other active com ponents in the signal path Both balanced and unbalanced signals can be split since the LEHLE TRANS FORMER HZ is capable of handling both types 2 OUTPUT SOCKET Connect the input of an amplifier or ef fects unit to be connected directly to the LEHLE P SPLIT III input here The input ...

Страница 11: ...s Connecting the ground conductors of the DIR and ISO outputs can help in some situations depending on the units con nected and on their power supplies Use the ground lift switch to find out for yourself the position in which noise is minimised 5 ISO OUTPUT Connect your amp or the audio input of a DAW or a mixer here The ISO output has an input signal which is isolated by means of the LEHLE TRANS ...

Страница 12: ...ead of Velcro for stability which you can also find in handy sizes at www lehle components com If you are using the Velcro Dual Lock method please make a note of the serial number on the bottom of the pedal be fore you cover it in case you have a sup port question for us later and don t fancy dismantling your board ...

Страница 13: ... am plifiers working in parallel extremely pow erful and simply big HOW TO DO THIS 1 Connect your instrument to the input socket of the LEHLE P SPLIT III 2 Connect the first amplifier to the DIR socket 2 3 Connect the ISO socket 5 to the input of the second amp 4 Use the phase inverter switch 3 to de termine which setting you prefer 5 Use the ground lift switch 4 to find the position at which nois...

Страница 14: ...r mixer or stage box 4 Use the phase switch 3 to find out which setting sounds better to you 5 Use the ground lift switch 4 to deter mine which position eliminates the most background noise 6 There you go DEVICE CONNECTION DIR ISO MADE IN GERMANY P SPLIT Input Output Instrument active Amplifier Output Input mixer stage box ISO DIR The signal from a passive pickup can not be split to an amp and mix...

Страница 15: ...olates the ground connection The hum loop is thus broken at this point Both high and low impedance signals can be fed the LEHLE P SPLIT III has no problems with balanced or unbalanced signals HOW TO DO THIS 1 Connect the signal source to the input 1 of the LEHLE P SPLIT III 2 Do not use the DIR socket 2 3 Connect the ISO socket 5 to the sig nal input 4 Use the ground lift switch 4 to deter mine wh...

Страница 16: ...ur accustomed sound from an amp while recording the dry signal In this configuration the LEHLE P SPLIT III again functions as a neutral splitter HOW TO DO THIS 1 Connect your instrument to the input 1 of the LEHLE P SPLIT III 2 Connect your amp to the DIR output socket 2 3 Connect the ISO socket 5 to the Hi Z input of a sound card or DAW 4 Use the ground lift switch 4 to deter mine which position ...

Страница 17: ... DRIVER II is the per fect solution for this task DIR ISO MADE IN GERMANY P SPLIT MADE IN GERMANY SUNDAY DRIVER S D DI You can of course also use a balanced input on your sound card or DAW to record the dry signal In this case it s a good idea to take a balanced signal from the ISO output of the LEHLE P SPLIT III please also see Balanced signal rout ing page 7 DEVICE CONNECTION LEHLE P SPLIT III D...

Страница 18: ...balanced signals from a sound card or a DAW HOW TO DO THIS 1 Connect your sound card or DAW to the input socket 1 of the LEHLE P SPLIT III 2 Do not use the DIR socket 2 3 Connect the ISO socket 5 to the input of your amp 4 Use the ground lift switch 4 to deter mine which position eliminates the most background noise 5 There you go DEVICE CONNECTION Input Signal source un balanced Output Signal inp...

Страница 19: ...ound connection see Types of signal routing pages 6 7 HOW TO DO THIS 1 Connect the balanced or unbalanced signal source to the input socket 1 of the Lehle P Split III 2 Do not use the DIR socket 2 3 Connect the balanced or unbalanced signal input to the ISO socket 5 4 Use the ground lift switch 4 to deter mine the position in which the most back ground noise is eliminated 5 There you go DEVICE CON...

Страница 20: ...DAY DRIVER II to convert the unbal anced instrument signal to a balanced signal Up to 100m of cable can be connected to the TRS output socket The LEHLE P SPLIT III can be used at the end of the line to convert the balanced signal back to an unbalanced signal for input to your amp This system makes it possible to convey the signal across great distances without signal losses DIR ISO MADE IN GERMANY...

Страница 21: ...nce the impedance matches If you are passively summing mono sig nals out of two different devices it can cause an impedance mismatch with the result that one signal is very low in volume and presence HOW TO DO THIS 1 Connect the left side of the stereo sig nal to the input socket 1 of the LEHLE P SPLIT III 2 Connect the right side of the stereo signal to the output socket DIR 2 Here this socket is...

Страница 22: ...22 LEHLE GmbH Germany www lehle com support lehle com ISO 5 PHASE 3 GROUND 4 DIR 2 INPUT 1 LEHLE P SPLIT III SIGNAL FLOW DIAGRAM ...

Страница 23: ... GmbH Germany www lehle com support lehle com LEHLE GmbH Grenzstrasse 153 46562 Voerde Germany www lehle com support lehle com LEHLE P SPLIT III OPERATING INSTRUCTIONS EN V1 0 2019 08 01 Copyright 2019 by LEHLE ...

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