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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 2 R- @# z* f! b# K6 N/ [; Q9 h
8 d% V+ S; n: f$ a+ K3 X" [英文电子说明书. t! c- @$ S, J7 ~( |
[1] POWER Switches the unit on or off. The unit is ready to operate with the factory7 H( b$ u2 L' y, D) M
default settings. The subsequent settings remain stored in a Flash EPROM
% J, a; U) u( v after switching the unit off (unit contains no battery).
# S/ L5 Z! Z5 ^3 R* D7 @, l[2] Input dBu FS Rotary switch for coarse input sensitivity setting in 10 dB steps. OFF position
4 W- d$ P3 o* \5 a between microphone and line sensitivity setting ranges.
) u( ~( j/ m0 o9 ? Mic: Range –40...+20 dBu& }9 Y: w, l; B
Line: Range +14 dBu, +24 dBu/ x% z& P2 T @7 b( A' c+ I8 j
[3] Fine Gain Potentiometer for fine input sensitivity setting.% L, N% y( Q* Y" Q% k& Z4 h$ G3 G
Range of additional gain: 0...+15 dB.8 s. d8 [3 u( o( t2 m6 z8 T ?
Headroom: The input sensitivity setting is calibrated in dBu per full-scale. It represents6 V; t6 w* ~; T
the dBu value of an analog input signal which causes a full-scale output of& ?+ m% U& R4 Z% U
the A/D converter. u0 M! s9 ?6 i' E
Example: A studio works with +4 dBu nominal analog level and uses 12 dB headroom;
6 [1 [2 S% L$ O7 S+ C the peak level is therefore +16 dBu. The “Input dBu FS” rotary; U' Y; ^0 {) s6 M
switch [2] is set to +24 dBu (i.e. gain setting short by 8 dB), and the “Fine
% m0 u7 ]# e9 P2 W0 s Gain” potentiometer [3] increases the gain by 8 dB.
4 K+ X. P! r% d, o9 q! h% F* `* D[4]...[6] Valve Dignifier Operative only if the function VALVE [8] is active.+ O# [2 q# {) A/ {3 H3 w5 P1 w
[4] Bass Warmth The sound of low frequencies becomes rounder; bass has more depth; vocals
' p0 N2 {. o4 d6 a+ m have more body; percussive instruments are less aggressive.4 j: D3 S- F7 p: ]& Y
The group delay behaviour due to AC coupling of the stages is different in
( V8 u& ?% L A tube amplifiers.
- h( J* L( v) n The “Bass Warmth” control allows to select the frequency range
/ y/ m4 Q0 N0 H1 W: x* v (10...200 Hz) within which the effect is active.: G3 X, J/ q# ?: V" Z
[5] Angel Zoom Adds transparency and clarity to vocals; emphasizes the solo instruments.$ ?) D$ E6 }2 C6 z1 X# H* t+ o
Valve amps have a characteristic response, mid-frequency harmonic content+ v5 @ l8 F* j' J! I: |8 M
is emphasized.
" N0 @! r! D. n% a[6] Valve Drive Gain/Clip Tight, full sound; the sound will be harder/softer.0 _, K, v% G8 ^ e
The harmonics spectrum of a delicately overloaded valve amplifier is completely- V. M8 c+ ?5 h
different from an overloaded transistor stage.! ]2 z) M |* V( I, `
The “Gain” control adjusts a gentle overload while the odd-harmonics content( \. J8 L T; P1 O3 T6 K2 u2 [0 E
can be adjusted with the “Clip” control.
# d- F: v- t! w3 X2 @[7] Line Out Output level setting, calibrated in dBu per full scale (dBu FS). Range: 4...24
1 f. V4 T$ T4 }5 @ dBu FS.
9 ^. @3 v p3 j3 A+ ]2 G[8] VALVE Toggle key for inserting the Valve Dignifier stage into the audio path of the
9 s+ I) R- i# Y. P- b& J desired channel.; J$ S# k+ ^) c M5 [" i; |
The “VALVE” LED is on when the Valve Dignifier stage is active.. T- i; A; g3 W I9 F8 e. \
[9] INSERT INSERT function.
! T; ]6 F0 n, w: p( X: G! Z First key pressure: INSERT POST VALVE, the Insert Send is tapped after
) i/ e: v. U i! t. x7 \) f the valve stage (display: “INS”); the Insert Return is directly fed to the Line7 l' h5 L+ J: G9 t5 M
and AES/EBU outputs.1 {: T H' ^- M5 G* @
Second key pressure: INSERT PRE VALVE, the Insert Send is tapped before/ Q# @6 Q' H, E! H' K
the valve stage (display: “INS” and “PRE”); the Insert Return is fed via
6 N% w+ z6 e% D; | the valve dignifier stage to the Line and AES/EBU outputs., e \( Z: @( q4 U
Third pressure: INSERT OFF, the input signal is fed via the valve dignifier
7 u3 ?/ N6 N# S* B stage (if active) to the Line and AES/EBU outputs (also the Insert Send output
+ C: [: I% W0 a) O/ i0 W; O receives this signal; display: none).
+ y7 `* Y( {4 \- r# b5 R! p$ f" {) B Insert Send and Insert Return are electronically balanced and equipped with
) K5 d* M* m* V: R6 w0 z XLR connectors.
, ~# ^# s8 G8 p# z, P! ^[10] ROUTING Selector for the channel routing when using one of the (optional) TDIF or
& ~9 |1 @, M. E5 E | ADAT digital interfaces. Each input channel can be switched to one of the u: Z2 g( C8 p# r% Z3 Q1 L( b
channels 1...8 of the multichannel interface. If desired, also a mono mix is
5 u7 Y- H" B3 ]9 [$ N3 h# t possible by selecting the same output channel for both input channels.6 l- T( l$ Y. G8 j9 G( P
[11] 48 V Toggle key to activate the 48 V phantom power supply for the desired microphone9 K5 S4 q3 O& x, [* g
channel.
3 c( |. H( g o I# f6 e Can be operated only if the input gain selector is in Mic position. The
, Z6 L. D) e5 [% h p) F/ Q setting remains stored when switching over to a line gain setting. ~2 `! ~ o: ^0 E9 |
[12] Activates the high pass filter on the microphone inputs of the desired channel.
# h& n; R0 b2 ? Cut-off frequency (–3 dB point) 75 Hz, slope 12 dB/octave.
8 |1 j O! g5 u$ l6 w Can be operated only if the input gain selector is in Mic position. The
: s6 m8 e; [. g, h setting remains stored when switching over to a line gain setting.
- Z: ]+ V$ m# n[13] Ø Toggle key to activate the phase reverse switch of the desired channel.4 j% N# S3 J4 n- Y# s( W
[14] MODE Toggle key to select the word length of the DIGITAL OUTput. 20 bit (display: U9 z; a" b* [- X9 r) ^
“20BIT”), 16 bit with dithering (display: “16DI”), or 16 bit with
, r/ a. a5 @7 v3 X- `) s: [& u Noise Shaping (display: “16NS”) can be selected.# n" b( Q" Y0 D& S8 y1 s3 Y" u: W
[15] SYNC Selects the synchronization source for the unit. Possible selections are:& q1 |* W/ j0 H' E
INT 48 Internal quartz reference, 48 kHz
9 f: u1 f, l& Q* J5 V K" n INT 44 Internal quartz reference, 44.1 kHz2 T) Z; k" C" S: I) w# @" R
WCLK Selects external Word Clock Sync (flashes if no valid input signal is recognized)* o0 ^; [0 J0 I- ~/ O
AES Selects external AES/EBU Sync (flashes if no valid input signal is recognized)
0 L: L5 [3 u4 |/ q: h AUTO Selects sources automatically in the sequence AES-WCLK-INT2 W5 C3 `( e+ u2 b/ B; {
VAR Indication only, active if the external source frequency deviates from 48 or$ U7 ^8 O5 E2 P- H. ]
44.1 kHz for more than approx. ±3 %.
6 ^5 o9 D: R$ g; f; g2 U1 L; j! P[16] PEAK HOLD Toggle key to select the PEAK HOLD function for the PPM level meters –
9 c3 x4 m* O6 g. K either permanently (display: “HOLD”), or with automatic reset after approx. 2 s.
) `* X K% |/ I. k1 u4 c[17] SOFT CLIP Toggle key to activate the SOFT CLIP function in the analog paths to reduce
- j7 U9 m1 x8 y) m$ l$ Q3 J8 Y the danger of overloading the A/D converter with short signal peaks (if. s. I( p1 F+ `3 f& p$ W. ]! n
active, the display indicates “SOFT”). Threshold at 3 dB below full-scale,& v0 N4 h4 K! A* b1 E
allowing for approx. 6 dB reserve before hard clipping occurs
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