Operation Manual
A
DVANCED
I
NSTALLATION
ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 29
C
ALIBRATION
S
TEP
1: C
ALIBRATING
M
ICROPHONE
I
NPUT
C
HANNELS
1.1. Press and hold the A
UX
I
N
L
EVEL
/S
ETUP
button and the I
NPUT
S
ELECT
button for
two seconds to enter configuration mode of the EF1210. For Calibration Step 1,
the S
ETUP
LED will blink once per period. For this step you will need a Sound
Level Meter (SPL Meter).
1.2. If necessary, press the R
EF
S
ELECT
button to select which zone the pink noise is
being played in.
• When you first enter configuration mode, pink noise is played in both Zone
A and Zone B.
•Press R
EF
S
ELECT
for no pink noise in Zone A or Zone B.
•Press R
EF
S
ELECT
again for pink noise in Zone A.
•Press R
EF
S
ELECT
again for pink noise in Zone B.
• Repeated pressing of R
EF
S
ELECT
will cycle through these four modes. See
Figure 11 on page 29.
1.3. Press the I
NPUT
S
ELECT
button to choose the input channel.
1.4. Set the SPL meter (Sound Level Meter) to C weighted, slow response. Choose
the appropriate dB SPL range using Table 4 below based on microphone type
and the talker’s distance from the microphone.
1.5. Place the SPL meter beside the microphone. Point the SPL meter and the micro-
Note
.
One period equals the number of blinks per step plus one off-time.
Figure 11.
Calibrating Mic Inputs
STEP 1.1: Press and
hold AUX IN LEVEL/
SETUP button
and
INPUT SELECT for 2
seconds to enter
configuration mode
STEP 1.3:
press to select
channel for
calibration
LEDs light to
indicate which
channel is selected
LED blinks
once for
microphone
calibration
noise level
measured at mic
should be at the
appropriate SPL
level from Table 3
pink noise to both zones
no noise generated
pink noise to zone A
pink noise to zone B
STEP 1.7: adjust
level until 3 green
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
M
ICROPHONE
T
YPE
T
YPICAL
D
ISTANCE
FROM
T
ALKER
(
FT
.)
SPL L
EVEL
(dB)
Lavalier 6 inches to 1 foot 89 dB SPL
Gooseneck 1-2 feet 77 dB SPL
Boundary or other tabletop 2-3 feet 73 dB SPL
Ceiling 4 or more feet 69 dB SPL
Table 4:
Typical distance from microphone to talker and appropriate dB SPL level.