Hardware Features; Front Panel - Focusrite Scarlett 18i20 User Manual

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User manual (37 pages)

User manual (36 pages)

Table of Contents

HARDWARE FEATURES

Front Panel

The . front . panel . includes . all . the . input . gain . and . monitoring . controls . as . well . as . two . of . the . input .

connectors .for .Mic, .Line .and .Instrument .signals.

1. . Inputs 1 .and .2 .– .Combo .type .input .sockets .- .connect .microphones, .instruments .(e.g., .guitar), .

or .line .level .signals .via .XLR .or .¼" .(6.35 .mm) .jacks .as .appropriate. .Either .¼" .TRS .(balanced) .

or .TS .(unbalanced) .jack .plugs .can .be .used .for .instruments .or .line .level .signals. .

2. . MIC 48V . – . two . switches . enabling . 48 . V . phantom . power . at . the . XLR . contacts . of . the . Combo .

connectors .for .mic .inputs .1-4 .and .5-8 .respectively. .(Note .that .inputs .3 .to .8 .are .on .the .rear .

panel.) . The . switches . each . have . an . associated . red . LED . indicating . that . phantom . power . is .

selected.

3. . Gain .1 & 2 .– .adjust .the .input .gain .for .the .signals .at .Inputs .1 .and .2 .respectively.

4. . INST . .– .two .switches .changing .the .input .configuration .for .the .jack .contacts .at .Inputs .1 .and .

2. .When .INST .is .selected, .the .gain .range .and .input .impedance .are .altered .(relative .to .LINE), .

and .the .input .is .made .unbalanced. .This .optimises .it .for .the .direct .connection .of .instruments .

(usually . v ia . a . 2 -pole . ( TS) . j ack . p lug). . W hen . I NST . i s . o ff, . t he . i nputs . a re . s uitable . f or . t he . c onnection .

of .line .level .signals. .Line .level .signals .may .be .connected .either .in .balanced .form .via .a .3-pole .

(TRS) . j ack . o r . u nbalanced . v ia . a . 2 -pole . ( TS) . j ack. . T he . s witches . e ach . h ave . a n . a ssociated . r ed . L ED .

indicating .that .INST .is .selected.

5. . PAD . – . t wo . s witches . w hich . i nsert . a . 1 0 . d B . p ad . i n . t he . s ignal . p aths . o f . I nputs . 1 . a nd . 2 . . W ith . t he . p ad .

applied, . t he . m aximum . i nput . s ignal . l evel . i s . + 16 . d Bu. . T he . s witches . e ach . h ave . a n . a ssociated . r ed .

LED .indicating .that .PAD .is .selected.

6. . Gain 3 to 8 .– .adjust .the .input .gain .for .the .signals .at .Inputs .3 .to .8 .respectively. .(Note .that .the .

connectors .for .these .inputs .are .on .the .rear .panel.)

7. . Input . m eters . – . e ight . 5 -segment . L ED . b argraph . m eters . i ndicating . t he . s ignal . l evels . o f . t he . e ight .

analogue . input . signals. . The . meters . show . signal . level . after . the . input . gain . stage, . and . thus .

their .indication .is .affected .by .the .gain .controls. .The .LEDs .illuminate .at .-42 .(green, ."signal .

present"), . - 18 . ( green), . - 6 . ( green), . - 3 . ( yellow) . a nd . 0 . d BFS . ( red). . A . l evel . o f . 0 . d BFS . i mplies . d igital .

clipping, .and .should .always .be .avoided.

8. . USB active . L ED . – . a . g reen . L ED . w hich . i lluminates . w hen . t he . u nit . i s . r ecognised . b y . t he . c omputer .

to .which .it .is .connected.

9. .