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发表于 2012-5-20 00:04:04
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本帖最后由 dan3963101 于 2012-5-20 00:12 编辑 0 z2 S% O1 B6 S2 O" C+ @4 A# J
6 H6 {1 }) q; a T. d! T+ `英文电子说明书
# j" H$ o2 c$ z- U: U! ^' e[1] POWER Switches the unit on or off. The unit is ready to operate with the factory
5 G7 o, f( s" q. B. J default settings. The subsequent settings remain stored in a Flash EPROM/ g5 G9 @+ d( Z) S2 O- G
after switching the unit off (unit contains no battery).
$ q+ U3 G) @& ]& }" N0 P2 p[2] Input dBu FS Rotary switch for coarse input sensitivity setting in 10 dB steps. OFF position% _) g7 B: J3 U1 D
between microphone and line sensitivity setting ranges.
& q. C6 L6 {$ C) f Mic: Range –40...+20 dBu
1 Z( |9 }3 c; g! K Line: Range +14 dBu, +24 dBu
9 W( }% z! O& l[3] Fine Gain Potentiometer for fine input sensitivity setting.( W* }+ C& y' |8 R) N' p5 Q2 z5 ?& `
Range of additional gain: 0...+15 dB.
f/ H. U0 [. A7 z( k; F6 f) Q! r Headroom: The input sensitivity setting is calibrated in dBu per full-scale. It represents0 g0 x( a6 D- E# e' L
the dBu value of an analog input signal which causes a full-scale output of
1 S6 R0 |/ I8 y4 i* P the A/D converter.
+ U% h7 j% E, U& B Example: A studio works with +4 dBu nominal analog level and uses 12 dB headroom;
. M! I3 Q7 K$ f) Y8 L# ^" D7 ~ the peak level is therefore +16 dBu. The “Input dBu FS” rotary
: I1 a+ v, n8 b" g switch [2] is set to +24 dBu (i.e. gain setting short by 8 dB), and the “Fine& g) z9 L2 G+ c5 f. @2 W, g9 ~
Gain” potentiometer [3] increases the gain by 8 dB.$ v; ?+ K& T& ]
[4]...[6] Valve Dignifier Operative only if the function VALVE [8] is active.* c1 Z( h W6 N
[4] Bass Warmth The sound of low frequencies becomes rounder; bass has more depth; vocals, k. Q) a7 {/ W7 L, R% m
have more body; percussive instruments are less aggressive.
- j& W1 V% ^0 a C The group delay behaviour due to AC coupling of the stages is different in8 I9 X9 D5 P& A+ K) d
tube amplifiers.
; M1 n: {+ ^: k The “Bass Warmth” control allows to select the frequency range/ ~( D0 y7 [3 i. o8 A! [5 B3 L
(10...200 Hz) within which the effect is active.6 o/ O" O6 C5 C& g" ]
[5] Angel Zoom Adds transparency and clarity to vocals; emphasizes the solo instruments.) G1 N/ C- \* u' k' k9 |4 `4 t& x
Valve amps have a characteristic response, mid-frequency harmonic content" f1 S/ m" I7 \; M
is emphasized.7 d, z; g! c8 j$ | i2 n8 n
[6] Valve Drive Gain/Clip Tight, full sound; the sound will be harder/softer.7 W, V; J* ] c7 R& D( G
The harmonics spectrum of a delicately overloaded valve amplifier is completely
4 a# b/ o) w& @: _! E# ` different from an overloaded transistor stage.
7 c# u0 q# Y8 N7 t! c The “Gain” control adjusts a gentle overload while the odd-harmonics content6 G( T& N9 I% @) C5 X
can be adjusted with the “Clip” control.
5 ~( O* X+ i1 N; l" I0 q[7] Line Out Output level setting, calibrated in dBu per full scale (dBu FS). Range: 4...24, y& S) M0 M( z2 I4 A5 D3 E
dBu FS.3 c# F6 g8 [" W, B8 L7 R+ t
[8] VALVE Toggle key for inserting the Valve Dignifier stage into the audio path of the3 {* X H5 [$ y1 i4 S+ S4 Z% u
desired channel." _ r! E) }* Y3 k7 c
The “VALVE” LED is on when the Valve Dignifier stage is active.1 \. F2 u: |/ }9 \
[9] INSERT INSERT function.* g4 Y) R$ d4 X$ ~" d3 B
First key pressure: INSERT POST VALVE, the Insert Send is tapped after; h! X0 k' ~# _# B( \# T
the valve stage (display: “INS”); the Insert Return is directly fed to the Line. |8 k: \7 S+ C4 b( j5 R% ~! F
and AES/EBU outputs.3 {& q! N' H7 n& t) q
Second key pressure: INSERT PRE VALVE, the Insert Send is tapped before# v3 a. ]) s2 C
the valve stage (display: “INS” and “PRE”); the Insert Return is fed via
7 F4 J# f, y0 I' E$ i @+ } the valve dignifier stage to the Line and AES/EBU outputs.7 c7 i9 J" O9 q& F! P) ]5 j
Third pressure: INSERT OFF, the input signal is fed via the valve dignifier
2 `; o T4 v, x" U5 W stage (if active) to the Line and AES/EBU outputs (also the Insert Send output
, z8 J; L0 [5 l1 c- w3 M' w receives this signal; display: none).4 o7 w G# g8 N; j1 C" \. `6 W
Insert Send and Insert Return are electronically balanced and equipped with
( v' ]2 G6 p0 v4 v( u4 S x XLR connectors.! c6 I; d" z% u& G* ]8 q7 j7 M; N% A
[10] ROUTING Selector for the channel routing when using one of the (optional) TDIF or
6 u3 v- b) b6 z& I0 i ADAT digital interfaces. Each input channel can be switched to one of the
8 H9 M ^. `) t* y% J' o channels 1...8 of the multichannel interface. If desired, also a mono mix is
7 b' ?! J: H' _3 x possible by selecting the same output channel for both input channels.
; M6 w- p0 l# I% w* L[11] 48 V Toggle key to activate the 48 V phantom power supply for the desired microphone
2 e1 @; o9 m# j9 n; T0 o channel.
( f( v0 c& m3 s( X! Q Can be operated only if the input gain selector is in Mic position. The
4 k+ q* i2 D2 i setting remains stored when switching over to a line gain setting.8 t# K" L8 K! A; L5 t' D
[12] Activates the high pass filter on the microphone inputs of the desired channel.
' M# u' S% y' i: D) t5 h Cut-off frequency (–3 dB point) 75 Hz, slope 12 dB/octave.
. A( I8 v( H0 K! O Can be operated only if the input gain selector is in Mic position. The
2 p/ |$ ]4 ?- c, m& s' m5 w& g setting remains stored when switching over to a line gain setting.& @7 s" T# b7 F) F, u) b
[13] Ø Toggle key to activate the phase reverse switch of the desired channel.
4 S8 Y% w5 q3 M- ]1 n# }4 v1 S' j[14] MODE Toggle key to select the word length of the DIGITAL OUTput. 20 bit (display:
- ]/ J* n. M, j4 B “20BIT”), 16 bit with dithering (display: “16DI”), or 16 bit with9 G( P6 f9 |, V2 [; @9 a
Noise Shaping (display: “16NS”) can be selected.4 A {, z/ u- J! x+ Z
[15] SYNC Selects the synchronization source for the unit. Possible selections are:
; M- z& M$ M, @/ o4 c: j INT 48 Internal quartz reference, 48 kHz0 e0 p; N' x, L2 w; u
INT 44 Internal quartz reference, 44.1 kHz
" L- n o0 R2 S WCLK Selects external Word Clock Sync (flashes if no valid input signal is recognized), J j% t% Y& l* {; Q' E/ o9 @
AES Selects external AES/EBU Sync (flashes if no valid input signal is recognized)( u5 J" |; a. `) J g
AUTO Selects sources automatically in the sequence AES-WCLK-INT
+ x1 l" l" R8 I1 T5 Q B; [ VAR Indication only, active if the external source frequency deviates from 48 or& D! F# V# j8 L' |+ b2 R
44.1 kHz for more than approx. ±3 %.! g4 x9 @; q {) P7 P
[16] PEAK HOLD Toggle key to select the PEAK HOLD function for the PPM level meters –
8 l5 J8 i+ N# {2 Q" w, F' T4 V6 V either permanently (display: “HOLD”), or with automatic reset after approx. 2 s.
2 ]7 R6 M$ X; Y D( P[17] SOFT CLIP Toggle key to activate the SOFT CLIP function in the analog paths to reduce; z: _# S5 \ w8 y7 O7 {) Y
the danger of overloading the A/D converter with short signal peaks (if1 x7 f6 B0 I0 d6 {$ _! N, s
active, the display indicates “SOFT”). Threshold at 3 dB below full-scale,
% ^. _1 u$ N9 V* n allowing for approx. 6 dB reserve before hard clipping occurs
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