Midas HERITAGE 4000, Руководство оператора

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Stereo Input Channels
Channel Equalisation
In the process of describing the stereo input channel, controls will be described in order
of signal flow.
48V
PAD
PHASE
GAIN
Balance
Freq
Treble
Bell
The Heritage 4000’s stereo input channels each have two (2) balanced microphone inputs and one
insert point per input (i.e. two inserts per channel) on conventionally wired TRS quarter-inch
(0.25”) jack plugs.
The insert points are balanced and hence two TRS quarter inch jacks provide the send and return
for each insert.
Note that stereo channels do not carry a direct output.
For clarity, both the inputs and inserts are labelled and .
- Phantom power is provided to allow the connection of condenser microphones, direct inject
boxes or other devices req48V Phantom power to operate. When
depressed, the 48V LED will light, indicating that phantom power is being
applied. NOTE: On stereo modules, +48V phantom is applied to both left
and right inputs.
- Pad provides 25dB of attenuation to both input signals to allow the connection of
high output microphones or line-level signals. If the input signal is transformer coupled
(option), the use of the pad greatly reduces the risk of saturation at very low frequencies.
The pad LED will light when 25dB of attenuation is being applied.
- The phase switches cause a 180 degree phase change (with respect to the
input) to occur in the input amplifier. The upper switch acts upon the left input whereas
the lower switch acts upon the right input allowing separate phase alteration between
inputs.
- The input gain for both input amplifiers is continuously variable from +15dB to +60dB.
- The balance pot is available on stereo input modules only and allows for the
reciprocal adjustment of the stereo left and right signals by +10dB to -10dB. This allows the
fine adjustment of the left and right signal levels.
The treble equalisation is selectable 1.5 octave peaking (bell) or Midas shelving via the bell
switch.
- The frequency centre of the EQ is continuously variable from 1kHz to 20kHz.
- Controls the gain of this EQ stage and is continuously variable from -15dB to +15dB
with a centre detent at 0dB.
- The bell switch selects between classic Midas Shelving EQ (bell switch OUT) and 1.5
octave bandwidth Bell EQ (bell switch IN).
left right
Ø
Auxtender Pod Auxtender Pod
The auxtender pod provides each input channel strip with an additional 16 mixes (eight stereo auxes) making the
total number of ‘auxiliary’ (aux) outputs for the console forty (40).
Each stereo aux send is enabled by pressing the numbered switch adjacent to the gain potentiometer (pot). When
enabled the accompanying LED will light according to the pre/post switch position.
Green = Stereo Aux send is POST-Fader
Red = Stereo Aud send if PRE-Fader
The gain pot is continuously variable from off (-inf) to + 6dB.
48V
PAD
O
O
balance
c
r l
+60
+25 +35
+15
gain
balance
c
r
l
+60
+25 +35
+15
gain
INPUTS
Return
Microphone
Left Input
Microphone
Right Input
Send Right
Send Left
bell
freq
1k
5k
20k
15
15
0
treble
auxtender
pod
0
gain +6
0
gain +6
0
gain +6
0
gain
+6
0
gain +6
0
gain +6
0
gain +6
0
gain +6
st aux 1
st aux 2
st aux 3
st aux 4
st aux 5
st aux 6
st aux 7
st aux 8
PRE
NO
PRE
NO
PRE
NO
PRE
NO
PRE
NO
PRE
NO
PRE
NO
PRE
NO
stereo
input
modul
e
MIDAS H404
balance
c
MIDAS XL0004
15
15
bass
0
freq
20
60 160
400
bell
freq
20
100
400
15 15
0
hi-mid
15
0
lo-mid
freq
400
2k
8k
freq
100
500
2k
bell
freq
1k
5k
20k
15 15
0
treble
+60
+25 +35
+15
gain
0
hi ‘Q’
hi ‘Q’
15
l r l r
C
pan
mute
C
0 0
+6 l r
C
0
0
+6 l r
C
0 0
+6 l r
C
0 0
+6 l r
C
0 0
+6 l r
C
0 0
+6 l r
C
0
0
+6 l r
C
0 0
+6 l r
1
3
5
7
2
4
6
8
17
19
21
23
18
20
22
24
9
10
11
12
13
14
15
16
C
0 0
+6 l r
C
0 0
+6 l r
C
0
0
+6 l r
C
0
0
+6 l r
ST MONO
PRE
PRE
PRE
PRE
18
15
12
9
6
3
0
3
6
9
25
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE PRE
PRE
INS
EQ
O
48V
PAD
O
Operators Manual
- Page 11
Stereo Input Module Stereo Input Module