Access 902 User Manual - page 12
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To turn the EVC Feature ON or OFF:
1) SELECT a valid Product Group for EVC by PRESSing its Select Key.
Valid Product Groups are typically speakers and amplifiers. EVC cannot be applied to source
Product Groups.
2) PRESS the ON/SPL key in the EVC section of the panel to toggle between ON and OFF.
To automatically calibrate products for equal volume:
1) Verify that EVC is ON.
2) SELECT a valid Product Group to calibrate.
3) Adjust volume to moderately loud listening level.
4) LPRESS the AUTO-CAL key.
This will activate the 902’s pink noise generator and initiate the automatic calibration sequence. Each product
in the group will be selected in turn and its relative SPL measured by the 902’s microphone. The 902 will
calculate each product’s relative efficiency and automatically store that value in memory (overwriting any
previously stored value) as a default for whenever that product is selected.
To manually adjust attenuation values:
1) Verify that EVC is ON.
2) SELECT a valid Product Group to manually adjust.
3) Adjust volume to moderately loud listening level.
4) PRESS the P-NOISE key to activate the pink noise source, or use music.
5) Use the ATTEN. LEVEL UP (▲) or DOWN (▼) arrow keys to increase or decrease the attenuation
value.
PRESS arrow keys to increment 0.2 dB.
DOUBLE-CLICK arrow keys to increment 10dB.
HOLD arrow keys to increment at a steadily increasing rate.
6) To store a new attenuation value for the currently SELECTED product in the ACTIVE Group,
LPRESS the ON/SPL (STORE) key until it beeps.
NOTE: Manual adjustments which are not saved (Step 6) as the new default, will not be retained for later use.
7) Repeat Step 5/6 for each product you want to adjust.
8) Turn off Pink Noise Source by PRESSing the P-NOISE key, or PRESS the ON/SPL key to turn EVC
feature OFF.
Audio Muting (902 Only)
The 902’s EVC section also provides two programmable levels of audio Muting. Muting enables the operator
to immediately lower the audio level by a predetermined amount during demonstrations to allow conversa-
tion with the customer without having to yell over the music. It is also convenient for situations like answer-
ing the phone in the demo area, or regaining control when self-serve customers get too loud. Muting can also
be used as a “safety” feature to protect from unexpected volume blasts when selecting high powered amplifi-
ers.
Whenever audio Muting is engaged, the amount of muting attenuation will flash in the EVC display window.
The factory default settings are:
20dB of attenuation for Muting Level 1, and
30dB of attenuation for Muting Level 2.
To activate Muting Level 1:
PRESS the MUTE Key.