Operation Manual
EF1210 U
SER
M
ANUAL
8 http://www.aspi.com Copyright © 1999, All Rights Reserved
EF1210 C
ALIBRATION
Q
UICK
R
EFERENCE
Calibration Step 1: Calibrating Microphone Input Channels
1.1. Press and hold the AUX IN LEVEL/SETUP and the INPUT SELECT buttons for 2 seconds to enter setup. SETUP LED blinks once
per period.
1.2. Press REF SELECT to select noise output source.
1.3. Press INPUT SELECT to select input channel to calibrate.
1.4. Place SPL meter beside mic pointing in the same direction. Adjust loudspeaker for 73 dB SPL at mic (for boundary mics) or
refer to Table 4 in Calibration Section for other mic types.
1.5. Press LEVEL ADJUST until first yellow LED (0 dB) on INPUT meter is lit on INPUT meter.
1.6. Repeat steps 3-5 for each input channel.
Be sure to move SPL meter or mics so each
mic sees the appropriate SPL level.
2.1. Press the AUX IN LEVEL/SETUP button to enter Zone Output Calibration. SETUP LED blinks twice per period.
2.2. Press REF SELECT to select noise output source (we recommend using both zones simultaneously).
2.3. Select nominal output level for your room audio amplifier with LEVEL ADJUST (press UP for 0 dBu, DOWN for -10dBV).
2.4. Repeat for other Zone output if appropriate. Then return all mics to their operating position and orientation.
2.5. Check acoustic gain limit. Adjust external amplifiers/loudspeakers so that the loudspeaker volume is almost uncomfortably
loud OR no more than 3 green LEDs are lit on INPUT meter.
2.6. Press INPUT SELECT to select next input channel.
2.7. If INPUT meter shows more than 3 green LEDs, turn
down room amplifier.
2.8. Repeat steps 6 & 7 for each input channel.
Calibration Step 2: Calibrating Zone Outputs, Check Acoustic Gain
STEP 1.1
: Press and
hold AUX IN LEVEL/
SETUP button
and
INPUT SELECT for 2
seconds to enter
confi
g
uration mode
STEP 1.3
:
press to select
channel for
calibration
LEDs li
g
ht to
indicate which
channel is selected
LED blinks
once for
microphone
calibration
noise level
measured
at mic
should be
73 dB SPL,
or refer to
Table 4
pink noise to both zones
no noise
g
enerated
pink noise to zone A
pink noise to zone B
STEP 1.5
: adjust
level until 3
g
reen
and 1 yellow LEDs
are lit (repeat for
each channel)
STEP 1.2
: press to
select noise source
-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20
AUX IN
LEVEL
REF
SELECT
INPUT
SELECT
SETUP
AEC
A
AEC
B
12345678
INPUTPOWER REMOTE
MUTE
ALL
LEVEL
ADJUST
SETUP
AUX IN
LEVEL
REF
SELECT
INPUT
SELECT
SETUP
AEC
A
AEC
B
12345678
INPUTPOWER REMOTE
MUTE
ALL
LEVEL
ADJUST
SETUP
STEP 2.7
: adjust external
amplifiers/loudspeakers so that
no more than 3
g
reen LEDs are
lit (repeat for each channel)
-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20
STEP 2.2
:
press to select
noise source
noise to both zones (recommended)
noise to zone A
noise to zone B
STEP 2.6
: press
to select channel;
check level
LEDs li
g
ht to
indicate which
channel is selected
LED blinks
twice for Zone
calibration
STEP 2.3a
: press
if amp expects
consumer level
input (-10 dBV)
STEP 2.3b
:
press
if amp
expects 0 dBu
balanced input
LED Off LED On Button
Legend:
LED Blinking