Alto MAXIDRIVE 3.4 PC II User manual

www.altoproaudio.com
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Version 1.0
MODEL: MAXIDRIVE 3.4 PC II
Revised on Jan, 2010

CONTENTS
1. Introduction…………………………………………………………………………….....1
2. Specification………………………………………………………………………….......2
3. Block Diagram…………………………………………………………………...............3
4. Schematic Diagram……………………………………………………………..............4
5. Wiring Diagram………………………………………………………………….............9
6. PCB Layout………………………………………………………………………..........10
7. Test Procedure……………………………………………………………………........15
8. Exploded View & Mechanical Parts List…………………………………………...17
9. BOM List…………………………………………………………………………….......19

MAXIDRIVE3.4 PC II is an extremely versatile digital processor for loudspeaker systems based on the
GENERALMUSIC custom DSP RED 208. This powerful 40 bit resolution DSP, together with low-noise 20 bit
converters, provides an extremely high processing quality and a dynamics suitable for the most professional
applications. MAXIDRIVE3.4 PC II has 2 inputs (analog or digital) and 4 independent outputs and can be
configured as 2 -way stereo, 2, 3, 4way mono or as distribution mixer with up to 4 outputs. Configurations that
allow the 2 input signals to be summed and routed to different outputs are also available.
Each of the 2 inputs has:
- MASTER DELAY, available also on the input SUM;
- 5-BAND PARAMETRIC EQ;
- level control.
Each of the 4 outputs has:
- DELAY line;
- 5-BAND PARAMETRIC EQ;
- CROSSOVER HP and LP filters which can be selected from the BESSEL,
BUTTERWORTH and LINKWITZ-RILEY types with slopes up to 48dB;
- phase control with 5° steps through a full 360° ;
- digital LIMITER;
- level and MUTE control.
All settings can be stored and recalled in an instant. In fact, the system has:
- 10 Factory PRESETS, each of which can be used as a basic configuration for preparing custom
PRESETS, others already optimized for ALTO loudspeaker systems.
- 64 User PRESETS, which can be freely programmed to store all the system settings.
- Each User can contain any of the Input/Output configurations available.
All operations are carried out via user interface that includes a 2x16 LCD, a convenient DIAL for the parameter
modification and selector buttons for the direct access to all the features.
40-bit custom DSP
Balanced XLR inputs and outputs
20-bit A/D and 24-bit D/A converters
Configurations: STEREO 2-WAY, MONO 3 or 4-WAY, 4 OUTPUT DISTRIBUTION
MIXER
Features: CROSSOVER, PARAMETRIC EQ, DELAY, PHASE, LIMTER
MIDI interface
Switching Built-in power supply
1 unit
1. Introduction
--- 1 ---

Connectors 2* COMBO
Nominal Input Sensitivity 0 dB (0.775V)
Input Impedance 30 kOhm, electronically balanced
Maximum Input level +20 dBu
Input Gain -30 / +6dB variable in 0.5 db Steps
Connectors 6*XLR-M
Output Impedance 600 Ohm, electronically balanced
Nominal Output Level 0 dBu
Maximum Output Level +20 dBu
Output Gain -30 / +6 dB varaible in 0.5 dB steps
A/D converters 20 bit
D/A Converters 20 bit
Internal Dynamics 40 bit
Sampling Frequency 48 K Hz
Configuration 2-WAY STEREO,3-WAY STEREO,2,3,4,5,6-WAY MONO
Crossover Filters Type Bessel, Butter worth of Linkwitz-Riley
Crossover Filters Slope 6,12,18,24,or48 dB per octave
Delay Step 21 microseconds minumum
Max Delay Time 2621 ms(inputs), 291 ms(outputs)
EQ Filters Up to 40 maximum (depending on the crossover slope)
EQ Type Peak,6dB Lo-Shelf,12dB Lo-shelf,6dB Hi-shelf,12dB Lo-shelf, Notch
EQ Gain +/- 15dB, variable in 0.05 steps
EQ Bandwidth 0.05 to3.00 octaves, variable in 0.05 steps
EQ Frequency 15.6 Hz to 16 kHz
Dynamics Digital limiter on all the output
Menories FACTORY PRESETS are 10 + 64USER PRESETS
Communications 9-PIN RS232, XLR-F RS485 IN,XLR-M RS485 OUT
Frequency Response 20Hz- 20kHz, 0.25dB
Dynamic range Ї117dB 20Hz to 20kHz
Channel Separation Ї100dB 20Hz to 20KHz
Distortion(THD) 0.05%, 20Hz to 20kHz
Dimensions 483*44*300mm
Weight 4.0Kg
Power supply see label on the unit
Output Section
INPUT Section
Physical
General
Performance
Features
DSP Section
2. Specification
--- 2 ---

Signal Processing
Balanced inputs (IN A & IN B).
20-bit A/D converters.
LED ladders for monitoring input signals.
5-band parametric equalizers for A & B inputs.
3 delay lines (IN A, IN B & Sum A+B).
Routing System for connecting INPUTS and OUTPUTS.
Delay lines in 1-6 output.
Low-pass filters (LPF) with phase fine control - CROSSOVER.
High-pass filters (HPF) - CROSSOVER.
5-band parametric equalizers for the outputs.
Output level controls.
Polarity inverter.
Output level LIMITERS.
LED ladders showing output levels and limiter action.
Output MUTING controls.
20-bit D/A converters.
XLR-M balanced outputs.
3. Block Diagram
--- 3 ---

4. Schematic Diagram
--- 4 ---

--- 5 ---

1 2 3 4 5 6 78
A B C D
8
7654321
D
C B A
3 2
15
6
7
AGND
+12V
-12V
AGND
3 2
1
5 6
7
AGND
AGND
+12V
-12V
1 2 3 4 5 6 X1 X2 X3 1 2 3 4 5 6 X1 X2 X3
INLEFT
INRIGHT
5 6
7
AGND
3 2
1
5 6
7
AGND
3 2
1
AGND
5 6
7
AGND
3 2
1
AGND
AGND
AGND AGND AGND AGND AGND AGND
S2
2 1 3 4 2 1 3 4 2 1 3 4
OUT1 OUT2 OUT3
1 2
3 4
5 6
7 8
1 2
3 4
5 6
7 8
1 2
3 4
5 6
7 8
+12V +12V +12V
RLN RLN RLN
AGND
AGND
CONNECT TO CN1 CPU BOARD
5 6
7
AGND
3 2
1
AGND
5 6
7
AGND
3 2
1
AGND
5 6
7
AGND
3 2
1
AGND
AGND AGND AGND AGND AGND AGND
2 1 3 4 2 1 3 4 2 1 3 4
OUT4 OUT5 OUT6
1 2
3 4
5 6
7 8
1 2
3 4
5 6
7 8
1 2
3 4
5 6
7 8
+12V +12V +12V
RLN RLN RLN
S2
11 14
T
1312 R
1 2 3 4 5 6 7 8
DGND
MUTE
MDI_I MDI_O
DGND
2 1 3 4 2 1 3 4
DIGITAL INPUT RS 485 LINK
2 1 3 4RS 485
10 7
T
98 R
DGND
MUTE
DGND
+12V
RLN
13
16
6
45
2
15
DGND
1 2 1 2 3 4 5 6 1
2 3 4 5 6
AGND
-12V
+12V+12V
DGND
84
84
84
84
84
+12V
-12V
84
84
84
AGND
S1
-12V
+12V
1 2 3 4 5 6 7 8 910 11 12 13 14
2 1 3 4 5
6 7 8 9
--- 6 ---

1 2 34
A B C D
4
321
D
C B A
1
2 3 4 5
6 7 8 9
10 11 12 13
14 15 16
17 18 19 20
CN2 CN2*10
SW3
SW2SW1 SW4
R1 10K
R2 10K
R3 4K7
R4 4K7
R5 10K
R6 10K
R7 10K
R8 10K
R9 470R
R10 470R
C2 100N
R11 470R R12 470R
R13 470R R14 470R
R15 470R R16 470R
R17 470R R18 470R
g
10 f
9
A1 3
e
1d
2
dp
5
c
4
A2 8
b
6a
7
DISP1 LED-7SEG-2
g
10 f
9
A1 3
e
1d
2
dp
5
c
4
A2 8
b
6a
7
DISP2 LED-7SEG-2
Q2 BC560
Q1 BC560
LED2 ID
LED1 PRESET
+5V +5V +5V
+5V
C1 10u/16V
1 2
CN1 CON2
1 2
CN3 CON2
R19 1K2
MAXIPC-DISP.Sch
Titel Size File: Date:
Drawn By: Sheet
RevisionModel No:
3-Mar-2004
C.C.LIN
ALTO MAXIDRIVE3.4 PC II Display
11of
MAXIDRIVE3.4 PC VER040303
A4
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1 2 34
A B C D
4
321
D
C B A
2 1
3 4 5
6
7 8 9
CN1 CN-RS232-2
1 2
3 4
5 6
7
8 9
10
CN2 CON10
MAXIPC-RS.Sch
Titel Size File: Date:
Drawn By: Sheet
RevisionModel No:
3-Mar-2004
C.C.LIN
ALTO MAXIDRIVE3.4 PC II RS232
11of
MAXIDRIVE3.4 PC VER040303
A4
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5. Wiring Diagram
--- 9 ---

6. PCB Layout
--- 10 ---

--- 11 ---

--- 12 ---

--- 13 ---

--- 14 ---

Test instruments
1. Sinusoidal signal generator 0dB
2. Dual trace scope, with probe
3. Digital multi-meter
4. RS232 JIG TEST (connector for RS232 with a pin 2 end 3 in short circuit)
5. RS485 JIG TEST
Adjustments
Par. 1: Visual check
Check the product appearance upon MAXIDRIVE 3.4 PC II assembly completed before
going on following test procedures
Par. 2: Connections
2-1. Make sure the main power supply SW is off.
2-2. Connect signal generator to IN A (input/output board: S10). Set the signal generator at
1KHZ, 0.775V (0dB).
2-3. Connect digital multi-meter to OUT (input/output board: S13). Set the multi-meter in dB
range.
2-4. Connect the CH1 test bar of Dual Trace Scope to OUT 1(input/output: S11), and CH2
test bar to OUT 3 (input/output: S9)
Par. 3: COMMAND PANEL test
a- Press and hold SEL button, PRESET LED indicator is lit on;
b- Press and hold UP button, the value on acrylic will increase;
c- Press and hold DOWN button, the value on acrylic will decrease;
d- Press and hold ENTER button, “CONFIRM”
Par. 4: RS232 test & RS485 test
4-1. Make sure RS232 JIG TEST & RS 485 JIG TEST has connected the +5.0 VDC power
supply;
4-2. Make sure SW2 (RS232&RS485 test control) is in center position;
4-3. Make sure SW1 (RS 485i & RS 485ΖTest control) is in position of RS 485i, and red
LED is on;
4-4. Insert RS232 test connector into RS 232 socket, XLR balanced connector into RS485
INPUT socket;
4-5. Switch SW2 to position RS232, check if LCD displays 232 85
4-6. Switch SW2 to center position, check if LCD displays 485i NO
4-7. Switch SW2 to position RS485, check if LCD displays 485i 85
4-8 Switch SW2 to center position, check if LCD displays 485ΖNO
4-9 Make sure SW1 (RS485i & RS 485ΖTest control) is in position RS485Ζ, the green LED
is on
4-10 Switch SW2 to position RS485, check if LCD displays 485Ζ85
7. Test Procedure MAXIDRIVE 3.4 PC II
--- 15 ---

4-11 Now RS232 & RS485 is OK. Switch SW2 to center position, SW1(RS485i & RS485Ζ
Test control) in position RS 485i, red LED is on
4-12 UnplugRS485 & RS232 test connectors.
Par. 5: INA SIGNAL test
5-1. Connect signal generator to IN A (input/output: S10), set signal generator at 1KHZ,
0.775V (0dB)
5-2. Check (S13) OUT 1 output level: it must be 0dB±1dB (0.775V).
5-3. Check (S9) OUT 3 output level: it must be 0dB±1dB (0.775V).
5-4. Check (S7) OUT 5 output level: it must be 0dB±1dB (0.775V).
5-5. Change the frequency of signal generator from 100Hz to 10K Hz: output level measured
should be same as that at1 K Hz
Par. 6: IN B SIGNAL test
6-1. Connect signal generator to IN B (input/output board: S12).set signal generator at 1KHZ,
0.775V (0dB)
6-2. Check (S10) OUT 2 output level: it must be 0dB±1dB (0.775V).
6-3. Check (S8) OUT 4 output level: it must be 0dB±1dB (0.775V).
6-4. Check (S6) OUT 6 output level: it must be 0dB±1dB (0.775V).
6-5. Change the frequency of signal generator from 100Hz to 10K Hz: output level measured
should be same as that at1 K Hz
Par. 7: MEMORY PUFF
7-1. Switch off main power SW
7-2. Meanwhile press and hold UP and SEL buttons and then switch on main power supply
SW
7-3. Check if the LCD flashes “AL” about 30 seconds
7-4. Switch off main power SW
7-5. Again switch on main power supply SW of MAXIDRIVE 3.4 PC II, now the LCD
displays “AL”
Par. 8: DIGITAL INPUT test
8-1. Input AES-EBU signals into DIGITAL INPUT (S3), and make sure there’ re signal
output from all OUTPUT.
Par. 9: Marking
Switch off main power supply SW, removing the testing wirings and cables.
- Test Completed -
--- 16 ---

MODEL No: MAXIDRIVE 3.4 PC II
8. Exploded View & Mechanical Parts List
--- 17 ---

˦˂ˡ ˣ˴ʳˡ ˗˸˶˼˼ ˦˸˶˼˹˼˶˴˼ ˤ
˄ ˠ˔˃ˇˈˈˉ ˙ʳ˴˸˿ ˠ˔˫˜˗˥˜˩˘ʳˣ˖ ˄
˅ ˛˜˃˃˃ˆ˃ ˣ˸ʳ˿ʳ˦˪ ˇˣʳ˥ˌ˗˅˞˞˙˧˧˃˙ ˄
ˆ ˠ˖˃˃ˈˉˊ ˧ʳ˶˸ ˠ˔˫˜˗˥˜˩˘ʳˣ˖ ˄
ˇ ˠ˕˃ˆ˃ˌ˄ ˖˻˴˼ʳ˸˴ʳ˴˸˿ ˠ˔˫˜˗˥˜˩˘ʳˣ˖ ˄
ˈ ˠ˜˃˄ˌ˅˄ ˙ʳ˴˸˿ ˠ˔˫˜˗˥˜˩˘ʳˣ˖ ˄
ˉ ˡ˗˃˃ˆ˃ˇ ˘˩ʳ˹˴ ˆˁˈʽˆˆˁˈʽˈ˃ˠˠʳ˶˻ ˄
ˊ ˡ˜˃˅ˌ˃ˊ ˕ ˄˅ˁˆʽˊˁˆʽ˄ˈˁˈ ˇ
ˋ ˡ˜˃˅ˌ˃ˉ ˕ʳ˿˼˺˻ˀ˺˼˷˸ʳ˶˿ ˌʽˈʽ˅ˁˈ ˇ
ˌ ˡ˜˃˅ˋˊ˃ ˔˶˿˼˶ ˠ˔˫˜˗˥˜˩˘ʳˣ˖ ˄
˄˃ ˡ˜˃˃˅˄ˊ ˜˿˴˼˺ʳ˼˸˶˸ˀˣ˘ ˖ˢˡ˧˥ˢ˟ˆ˃ ˄
˄˄ ˛˞˃˄ˊ˄ˆ ˞ˀˣ˖˕ ˣˀˠ˔˫˜ˣ˖ˀ˥˦ ˄
˄˅ ˛˞˃˄ˊ˄˄ ˞ˀˣ˖˕ ˣˀˠ˔˫˜ˣ˖ˀ˗˜˦ˣˀ˗˜ˣ ˄
˄ˆ ˧˚˃˃˃˅ˌ ˩˿˴˺˸ʳ˶˸˸ ˦ˡˣˀˌˈˇ˄ʳˇ˃˪ ˄
˄ˇ ˛˞˃˄ˌˌˉ ˞ˀˣ˖˕ ˣˀˠ˔˫˜˗˥˜˩˘ˆˁˇˣ˖ʳˣ˨ˀ˗˜ˣ ˄
˄ˈ ˛˞˃˅˃˄ˇ ˞ˀˣ˖˕ ˣˀˠ˔˫˜˗˥˜˩˘ˆˁˇˣ˖ʳˠˣ˨ˀ˗˜ˣ ˄
˄ˉ ˛˖˃˃˃˃ˋ ˔˖ʳ˶˾˸ ˆˈ˄ˈʳ˔ʳ˧ˬˣ˘ ˄
˄ˊ ˠ˘˃˃˃˄ˉ ˠ˿˼ˀ˶˿˸˷ʳ ˇˠˠ ˅
˄ˋ ˛˔˃˄˄ˊˇ ˦˼˺˿˸ʳ˶˸˶ʳ˸˼˴˿ ˖˙ˍ˪˄ˇˉ ˅
˄ˌ ˠ˚˃˃˃ˇ˅ ˕˿˴˶˾ʳ˶˸ ˠˆʽ˄˃ ˅
˅˃ ˠ˙˃˃˃ˇˋ ˢ˸ʳ˺˸˴ʳ˴˻˸ ӽˇʽӽˋʽ˃ˁˈ˧ ˆ
˅˄ ˠ˚˃˃˃˅ˊ ˕˿˴˶˾ʳ˶˸ ˠˆʽ˄˅ ˇ
˅˅ ˠ˙˃˃˃ˆˋ ˦˼˺ʳ˴˻˸ ӽˇʽӽˊʽ˄˧ ˄
˅ˆ ˠ˚˃˃˃ˉ˄ ˕˿˴˶˾ʳ˶˸ ˠˆʽ˄˃ ˄ˋ
˅ˇ ˠ˜˃˃ˇ˃ˌ ˙˼˸˷ʳ˼˸˶˸ ˙˫ˀ˅˅ ˄
˅ˈ ˠ˜˃˃˅ˆˊ ˛˸˴ʳ˼˾ ˙˫ˀ˅˅ʳˇʽˆˇˁˈʽ˄ˉˁˈʽˆ ˄
˅ˉ ˠ˚˃˃˄˅ˋ ˠ˿˼ˀ˶˿˸˷ʳ ˠˆʽ˄ˉ ˄
˅ˊ ˠ˚˃˃˄ˉ˄ ˡ˼˶˾˸˿ʳ˶˸ ˠˆʽˉ ˇ
˅ˋ ˠ˚˃˃˃˅ˈ ˕˿˴˶˾ʳ˶˸ ˠˆʽˉ ˇ
˅ˌ ˠ˚˃˃˃ˇ˄ ˕˿˴˶˾ʳ˶˸ ˠˆʽˉ ˌ
Mechanical Parts List
--- 18 ---