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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 11: THE WORKS – Detailed Menu Reference 205

siteXwillgettheaudiofromaudioinputAandsiteYwillgettheaudio

inputintoaudioinputB.

• Finally,themodecanbeusedtotransmittwochannelsbetweentwounits.

Both"lines"mustbedialedup–Line1toLine1,Line2toLine2.Itis

importanttounderstan

dthedifferencebetweenthisuseofL3Dual/Mono

andtheL3StereoandL3J‐Stereomodes.

a) L3Dual/Monokeepsthetwoaudiochannelscompletelyseparate.

Infact,itdoesnotensurethatthetwochannelsremainphase‐

aligned.

b) L3Stereokeepsthetwoch

annelsseparate(i.e.thereisnodanger

ofcross‐talk)andmaintainsphase‐alignmentbetweenthetwo

channels.However,theperceptualmodelusedwithL3Stereodoes

assumethatthelistenerwillbehearingbothchannels

simultaneously(i.e.thatthisisastereoapplication).Therefore,the

modeltakesin

toaccountthataudiofromonechannelmaymask

audiofromtheotherchannel.

c) L3J‐stereomatrixesthetwochannelstogetherandthereforea

smallamountofinter‐channelinteractionispossible.

L3Dualoffers15kHzaudiofrequencyresponsewhentheSampleRateissetto

32kHz,or16kHza

udiofrequencyresponseiftheSampleRateissetto48kHz.

Z

ZEPHYR CLASSIC VS XSTREAM COMPARISON!

Early Layer-3 Zephyr’s call this mode "Mono/Dual". Later Layer2+3 Zephyrs call this mode

"L3 Dual".

h

HOT TIP!

These different uses of the L3 Dual/Mono mode may require different receive modes

depending on the use and the far end codec.

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