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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 193

13.1)thelevelwouldbe0dBu(nominal).Thesystemallowsfor18ofheadroom

abovenominallevel,clippingat+22dBu.

Consumer:

Thiswillbe‐11dBu(nominal)forthefactorydefaultsettingsofJP10&11(JP5

&6onearlyrevaudioboards).Ifthesejumpersarer

econfigured(seesection

13.1)thelevelwouldbe‐15dBu(nominal).Thesystemallowsfor18headroom

abovenominallevel,clippingat+7dBu.

Level Out: (Professional; Consumer)

Thisdeterminesthenominaloutputlevelasfollows:

Professional:

+4dBu(nominal).Clippointis+22dBu.

Consumer:

‐10dBu(nominal).Clippointis+8dBu.

Gain

Trim: (-12dB to +12 dB)

ThissettinghappensaftertheAnalog‐to‐Digitalconverter.Itwillaffectthelevelsofboththe

AnalogandAES/EBUinputs.Itcanbeusedtoadjustfordifferingheadroomrequirementswhen

connectedtoothergear.Sincethissettingisinthedigitaldomainchangingtovaluesgreater

thanthedefa

ult(0dB)willdecreaseoperatingheadroom,byacorrespondingamount.

w

IMPORTANT TIP!

Setting the gain trim adjustment (below) to values greater than 0 dB will serve to reduce

input headroom by a corresponding amount.

The analog inputs clip point remains at +22 dBu(or +8, see above) so this level must not be

exceeded. The rare source device with a clip point in excess of +22 dBu may require an

external pad.

TheGainTrimsettingmaybeusetoadjustfordifferingpeakoutputlevelsbetweendifferent

“+4nominal”sourceequipment,oritcanbeusedtoaccommodateanalogsourcesthatare

belowthenominallevels.Werecommendthatthesourceequipment’sclippointbe

determinedandthisbesetusingthatinf

ormation.

• Thedefaultsettingof0dBaccommodatesinputlevelsatnominallevelsof

+4dBuwithaclippointof22dBu(e.g.18dBheadroom).Whenfeedingthe

inputsfroma“+4nominal”devicethatclipsatsomelowerlevel(for

example+18dBu,e.g.14dBheadroom),youca

nincreasethegain(by4dB

inourexample)tomatchthisdevice’sclippointtotheXstream’s0dBfs

point.

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