Allen&Heath GR1 USER GUIDE - Manual (Page 5)

GR1
USER GUIDE 5
SPECIFICATION
CONNECTIONS
POWER REQUIREMENTS: 50/60Hz 25VA max
Mains voltage factory set for local requirements.
Mains input protection fuse ......... T315mA (220-240V)
T630mA (100-120V)
EMERGENCY DC POWER BACKUP:
External DC power supply or batteries.
+/-12 to 16VDC at 300mA
+12 to +48VDC microphone phantom power.
PHANTOM POWER: +48V DC
Global +48V ON switch, individual channel disable links.
0 dBu = 0.775 Volts RMS
0 dBV = 1 Volt RMS
Line level options: +4dBu (high level), 0dBu, -10dBV (300mV low level)
Width ............... 19.0" standard 19" rack ........ (540mm)
Height ............. 1.75" 1U rack space ............. (130mm)
Depth .............. 10.3" ......................................... (390mm)
weight ............. 10lbs ................... (4.5kg)
packed ............ 11lbs ................... (5kg)
CONSTRUCTION: All metal chassis.
Standard 19" rack mount in 1U space.
Removable top cover for calibration and service access.
Internal power supply unit with low radiation torroidal trans-
former.
INTERNAL OPERATING LEVEL: -2 dBu
INTERNAL HEADROOM: ........... +23 dB
MAX OUTPUTS: .......................... balanced +26 dBu 600 ohms max load
unbalanced +21 dBu 2kohms max load
METERS: ..................................... Individual bargraphs for L,R,M
-20VU (signal), 0VU, +16VU (peak)
PEAK LEDs: ................................ Turn on 5dB before clipping
DUCKING: ...... Signal override system.
Depth -6dB, -12dB 0r -18dB (internal option)
Release fast or slow (internal link)
Controlled by CH1,2,3 PRIORITY switches
Individual channel ducking disable (internal option)
COMPRESSOR/LIMITERS: ........ L,R,M individually controlled
Ratio 2:1, 4:1, 10:1 (internal option)
Threshold -30dB to +15dB (internal preset)
FREQUENCY RESPONSE: 20Hz to 30kHz +0/-1dB
DISTORTION: THD 0.04% Line in to mix out at 1kHz
CROSSTALK: . Channel shutoff better than -90 dB at 1kHz
Channel pan better than -75 dB at 1kHz
Interchannel better than -80 dB at 1kHz
NOISE: ............ 22Hz to 22kHz
MIC EIN -128 dB into 150 ohms
LINE pre-amp at 0dB -89 dBu
MIX noise -80 dBu
OUTPUTS:
L, R, M OUT .................. XLR ........................... pin 2 hot, 3 cold balanced ........ 50 ohms .......... -10dBV, 0dBu, +4dBu
DIRECT (SYS-LINK) ..... 15way D female ........ unbalanced ............................... 50 ohms .......... -2dBu
L, R, M (SYS-LINK) ....... 15way D female ........ unbalanced ............................... 50 ohms .......... -2dBu
ALARM OUT (SYS-LINK) 15way D female ...... unbalanced ............................... 50 ohms .......... -2dBu
ALARM DC (SYS-LINK) 15way D female ........ opto-coupled ............................. link to 0V to enable
HEADPHONES OUT ..... 1/4" jack .................... tip L, ring R .................. for stereo headphones 8 to 400 ohms
REMOTE VCA DC REF 15way D male .................................................. +10V, 0V reference voltage for remote VCA control
INPUTS:
MIC IN ............................ XLR ........................... pin 2 hot, 3 cold balanced ........ 2k ohms .......... variable -55 to -12dBu
....................................... LINE (pad selected) .. pin 2 hot, 3 cold balanced ........ 10k ohms ........ variable -35 to +8dBu
MONO LINE IN .............. 1/4" JACK .................. tip hot, ring cold balanced ........ 10k ohms ........ -10dBV, 0dBu, +4dBu
STEREO LINE IN .......... 1/4" JACKS ............... tip hot, ring cold balanced ........ 10k ohms ........ -10dBV, 0dBu, +4dBu
AUX IN (SYS-LINK) ....... 15way D female ........ unbalanced ............................... 10k ohms ........ -2dBu
ALARM IN (SYS-LINK) .. 15way D female ........ unbalanced ............................... 10k ohms ........ -2dBu
ALARM DC (SYS-LINK) 15way D female ........ opto-coupled ................ link to 0V to enable
REMOTE VCA DC IN .... 15way D male .................................................. +10V = level max, 0V = channel off
BACKUP DC IN ............. 15way D male ........... main supply +/-12 to +/-16V DC phantom power +12 to +48V DC