Allen&Heath GS1 SERVICE MANUAL - Manual (Page 4)

ALLEN & HEATH 4 S1SM1
MAX OUTPUTS: .......................... unbalanced +21 dBu 2kohms max load
METERS: ..................................... 8 segment bargraphs for L,R
-20VU to +6VU (peak)
0VU = +4dBu or -10dBV as selected
FREQUENCY RESPONSE: 10Hz to 30kHz +0/-1dB
DISTORTION: THD 0.006% Line in to mix out at 1kHz
CROSSTALK: Interchannel better than -75 dB at 1kHz
NOISE: ............ 22Hz to 22kHz
MIC EIN -127 dB into 150 ohms
LINE pre-amp at 0dB -88 dBu
MIX noise -82 dBu
POWER REQUIREMENTS: ........ 33VA max. at 50/60Hz
External power supply with Mains input factory set for local requirements.
Output supply on 5pin 240deg DIN 33Vac at 900mA
PHANTOM POWER: ................... +48V DC at 45mA generated internally
Global +48V ON switch with individual channel disable links.
0 dBu = 0.775 Volts RMS
0 dBV = 1 Volt RMS
Line level options: +4dBu (high level), -10dBV (low level)
CONSTRUCTION: ....................... All metal chassis with aluminium extrusions on front and sides. Moulded plastic end caps.
TECHNICAL SPECIFICATION
MIDI SPECIFICATION
Transmitted Note
The following message is transmitted for a mute key press:
9n kk v1 kk v2
n ...................... - MIDI channel 16 (fixed)
kk .................... - Note number (see Implementation tables)
v1 .................... = 40H or more ..... Mute ON
........................ = 3FH or less ...... Mute OFF
v2 .................... = 0
Received Note
9n kk vv
n ...................... - MIDI channel (must be equal to 16)
kk .................... - Note number (see Implementation tables)
vv ..................... = 40H or more ..... Mute ON
........................ = 3FH or less ...... Mute OFF
........................ = 0 ...................... IGNORED
Program Changes
In Patch mode, pressing a function key will transmit MIDI Program
Change messages as follows:
Cn p where,
n ...................... - MIDI channel = 16
p ...................... - Program Change No.
(see table Function keys in Patch mode)
The console will also recall its stored Patches on receipt of the
above message in any mode
GS1 Expander Implementation table
MUTE MIDI HEX DEC
CHANNEL NOTE
EX 1 ................ G#1 ..................... 2C ............... 44
EX 2 ................ A1 ....................... 2D ............... 45
EX 3 ................ A#1 ..................... 2E ............... 46
EX 4 ................ B1 ....................... 2F ............... 47
EX 5 ................ C2 ....................... 30 ................ 48
EX 6 ................ C#2 ..................... 31 ................ 49
EX 7 ................ D2 ....................... 32 ................ 50
EX 8 ................ D#2 ..................... 33 ................ 51
Basic GS1 Implementation table
MUTE MIDI HEX DEC
CHANNEL NOTE
1 ...................... G#0 ..................... 20 ................ 32
2 ...................... A0 ....................... 21 ................ 33
3 ...................... A#0 ..................... 22 ................ 34
4 ...................... B0 ....................... 23 ................ 35
5 ...................... C1 ....................... 24 ................ 36
6 ...................... C#1 ..................... 25 ................ 37
7 ...................... D1 ....................... 26 ................ 38
8 ...................... D#1 ..................... 27 ................ 39
9 ...................... E1 ....................... 28 ................ 40
10 .................... F1 ....................... 29 ................ 41
11 .................... F#1 ..................... 2A ............... 42
12 .................... G1 ...................... 2B ............... 43
Function keys in Patch mode
Fkey Prog Change Message
1 ................................................... CF 00
2 ................................................... CF 01
3 ................................................... CF 02
4 ................................................... CF 03
5 ................................................... CF 04
6 ................................................... CF 05
Function keys in MIDI mode
FKey Name MIDI Mess. (Press) MIDI Mess. (Release)
1 ...................... RECORD ............ 9F 5D 20 ............................... 9F 5D 00
2 ...................... STOP ................. 9F 5F 20 ............................... 9F 5F 00
3 ...................... PLAY .................. 9F 5E 20 ............................... 9F 5E 00
4 ...................... REW ................... 9F 5B 20 ............................... 9F 5B 00
5 ...................... FWD ................... 9F 5C 20 ............................... 9F 5C 00
6 ...................... CYCLE ............... 9F 58 20 ................................ 9F 58 00
Function keys in MMC mode
FKey Name MMC Message
1 ...................... LOCATE ............. F0, 7F, 7F, 06, 44, 02, 00, 08, F7
2 ...................... STOP ................. F0, 7F, 7F, 06, 01, F7
3 ...................... PLAY .................. F0, 7F, 7F, 06, 02, F7
4 ...................... REW ................... F0, 7F, 7F, 06, 04, F7
5 ...................... FWD ................... F0, 7F, 7F, 06, 05, F7
6 ...................... SET LOCATE ..... F0, 7F, 7F, 06, 4C, 02, 08, 01, F7