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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
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英文电子说明书2 N" h! ` Y: T; g; t7 L
[1] POWER Switches the unit on or off. The unit is ready to operate with the factory
" q- q9 u1 ]( Y5 Y; K& ?+ O default settings. The subsequent settings remain stored in a Flash EPROM( U( w! k! q9 X. v' t; g! _
after switching the unit off (unit contains no battery).
+ l3 I/ g: x" {5 I' N7 d[2] Input dBu FS Rotary switch for coarse input sensitivity setting in 10 dB steps. OFF position
7 N# G; z5 I3 `2 s/ q$ e between microphone and line sensitivity setting ranges.3 O: p% T( g* @2 X3 k' T% s5 ?! |
Mic: Range –40...+20 dBu* B0 J9 V: v' J
Line: Range +14 dBu, +24 dBu
) O$ v I4 M$ _, C6 @[3] Fine Gain Potentiometer for fine input sensitivity setting.
2 D7 A2 z x( I4 x+ O) }6 a7 m: a Range of additional gain: 0...+15 dB.# Q. Z. ?3 @& d- |5 O
Headroom: The input sensitivity setting is calibrated in dBu per full-scale. It represents$ h* t/ f9 k' y5 q1 K& v M9 W# x
the dBu value of an analog input signal which causes a full-scale output of9 j A! {5 X& q. ? M- t
the A/D converter.
, _6 Y% `6 R' ^ Example: A studio works with +4 dBu nominal analog level and uses 12 dB headroom;$ v, {# v* J! x/ h: s5 ^6 V
the peak level is therefore +16 dBu. The “Input dBu FS” rotary, n8 U1 G. U. W$ ^4 b
switch [2] is set to +24 dBu (i.e. gain setting short by 8 dB), and the “Fine1 E. X$ Y/ k* p4 E- c! {7 _
Gain” potentiometer [3] increases the gain by 8 dB.
* u, O5 T6 v$ ]: I[4]...[6] Valve Dignifier Operative only if the function VALVE [8] is active.) N; s; i1 w$ u$ {
[4] Bass Warmth The sound of low frequencies becomes rounder; bass has more depth; vocals* A% Q) `/ @7 `5 X
have more body; percussive instruments are less aggressive., L+ h. N' M1 P7 z. P4 d& U0 g3 A
The group delay behaviour due to AC coupling of the stages is different in: g3 H& N; } C8 Q' l
tube amplifiers.4 k/ j1 Z1 X5 V T$ k
The “Bass Warmth” control allows to select the frequency range3 X* W7 [4 m" _6 v* i
(10...200 Hz) within which the effect is active.
4 y' c; ]( B7 {1 s9 L! |[5] Angel Zoom Adds transparency and clarity to vocals; emphasizes the solo instruments.
2 l* n7 s) T2 r* L/ U4 s) R Valve amps have a characteristic response, mid-frequency harmonic content
' _) B! I) J, F2 |9 V3 ~# ` is emphasized.
$ I/ p1 ?- v* W6 N[6] Valve Drive Gain/Clip Tight, full sound; the sound will be harder/softer.+ R4 k- T9 [+ n: r1 T; q5 ^
The harmonics spectrum of a delicately overloaded valve amplifier is completely/ X+ Y( C* X/ h: \& k/ m8 ]5 H
different from an overloaded transistor stage.
9 ~8 H5 P+ I* d* u I/ ~; j) T The “Gain” control adjusts a gentle overload while the odd-harmonics content, B1 {3 B3 E8 ]0 [: P, @: `
can be adjusted with the “Clip” control.3 S$ m: L) j* f# T) _+ b( F0 D
[7] Line Out Output level setting, calibrated in dBu per full scale (dBu FS). Range: 4...24
$ w# i7 I( [& }: x* T# R/ ?9 C dBu FS.8 Y' v6 w& j9 P6 r# X1 m+ R9 D& p
[8] VALVE Toggle key for inserting the Valve Dignifier stage into the audio path of the" f4 `% Y" `: H" U$ U I9 p$ [4 O
desired channel.
4 {* i9 e: z4 F, W The “VALVE” LED is on when the Valve Dignifier stage is active.7 g0 [. h9 N0 r. Y7 \: Y
[9] INSERT INSERT function.
8 l8 b3 `' S- `" I: d3 V First key pressure: INSERT POST VALVE, the Insert Send is tapped after
1 h" Q% @& t5 b' s3 p3 a0 g% p3 J the valve stage (display: “INS”); the Insert Return is directly fed to the Line
5 O$ |) E2 ^4 d) @0 _7 h8 O- [; D and AES/EBU outputs.
! ?+ q! W$ A S8 [. t Second key pressure: INSERT PRE VALVE, the Insert Send is tapped before: D0 m, w# S8 J& n9 q" r4 _
the valve stage (display: “INS” and “PRE”); the Insert Return is fed via
/ B* |; g7 [( ^. A- e' a4 W the valve dignifier stage to the Line and AES/EBU outputs.' i6 U' B8 l: \2 v! L
Third pressure: INSERT OFF, the input signal is fed via the valve dignifier" n7 X1 p. u/ a" ?1 o: j
stage (if active) to the Line and AES/EBU outputs (also the Insert Send output3 P/ D9 G& |9 h0 Q6 K$ c+ c8 S
receives this signal; display: none).$ T6 j8 t- K0 f3 ~7 _
Insert Send and Insert Return are electronically balanced and equipped with
7 l# d( T6 t* O( k XLR connectors.) r3 a5 X' ~6 Z# f9 X; o& r
[10] ROUTING Selector for the channel routing when using one of the (optional) TDIF or, G6 H W. y/ c2 r7 M
ADAT digital interfaces. Each input channel can be switched to one of the4 [" P0 \1 j( J: I5 e
channels 1...8 of the multichannel interface. If desired, also a mono mix is
, o! F( o' N+ ?# X$ ^1 S A possible by selecting the same output channel for both input channels.
6 p1 z- Y3 K# Y# ]) W[11] 48 V Toggle key to activate the 48 V phantom power supply for the desired microphone _( l. H3 F! w. ~, ]
channel.
* d8 T+ H/ e2 r% k) J Can be operated only if the input gain selector is in Mic position. The
% Z8 B6 X- ~: a) g$ A+ A setting remains stored when switching over to a line gain setting.
! m% j1 x7 y @# V- ~[12] Activates the high pass filter on the microphone inputs of the desired channel.+ H! ^2 y' o: l2 S; A7 p! F5 Y
Cut-off frequency (–3 dB point) 75 Hz, slope 12 dB/octave.
8 F9 ]4 I0 V: X f4 e- l Can be operated only if the input gain selector is in Mic position. The( Q$ ^8 q# k; o
setting remains stored when switching over to a line gain setting.0 E6 z% j7 ?; }1 I5 u
[13] Ø Toggle key to activate the phase reverse switch of the desired channel.$ t" c. M5 {) ~1 M9 a9 x
[14] MODE Toggle key to select the word length of the DIGITAL OUTput. 20 bit (display:
6 o( r( ] T. U U' l o “20BIT”), 16 bit with dithering (display: “16DI”), or 16 bit with
8 h+ Z* ?6 v; G @* p* N' D* U/ C Noise Shaping (display: “16NS”) can be selected.& W0 q% w& d& l+ x
[15] SYNC Selects the synchronization source for the unit. Possible selections are:0 L! j! X4 C& h3 Z M$ c3 B
INT 48 Internal quartz reference, 48 kHz
& ~1 }* d6 \& b4 w: [ INT 44 Internal quartz reference, 44.1 kHz; [0 E7 ^% n5 Z
WCLK Selects external Word Clock Sync (flashes if no valid input signal is recognized)
9 W& E9 s, M. ^4 ^ AES Selects external AES/EBU Sync (flashes if no valid input signal is recognized)- H, p' l( P- C+ H4 m4 {
AUTO Selects sources automatically in the sequence AES-WCLK-INT
0 B' o3 s a0 d* @- G, U2 ` VAR Indication only, active if the external source frequency deviates from 48 or8 T' I8 O* X1 f2 u
44.1 kHz for more than approx. ±3 %.& S: m2 u) h( @; P9 Z. u) V0 ?. t
[16] PEAK HOLD Toggle key to select the PEAK HOLD function for the PPM level meters –$ X& z, r7 D9 R+ K% ~
either permanently (display: “HOLD”), or with automatic reset after approx. 2 s., m, ^# o1 @- N6 W# H
[17] SOFT CLIP Toggle key to activate the SOFT CLIP function in the analog paths to reduce# u& v" W5 |( C/ T8 o! L7 a
the danger of overloading the A/D converter with short signal peaks (if
: x& T: i/ A" Y1 O! F q active, the display indicates “SOFT”). Threshold at 3 dB below full-scale,, L+ {2 W: h2 {7 t9 v
allowing for approx. 6 dB reserve before hard clipping occurs% Q i' g7 }, E7 h6 I! h
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