AKG Acoustics HEARO 888 DIGITAL Mode D'emploi page 16

2 Description
Rear Panel
Refer to fig. 3.
Fig. 3: Transmitter rear panel
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Mode Label
Stereo STEREO
IVA Stereo STEREO + IVA
IVA Pro Logic PRO LOGIC + IVA
IVA LOGIC7 LOGIC7 + IVA
10.FREQ/INPUT: A short push (less than one second) steps through three fixed carrier frequencies with-
in the frequency band of your headphones system.
The labels FREQ 1, FREQ 2, or FREQ 3 will illuminate to indicate the selected frequency.
A long push toggles between the AUDIO IN L/R analog inputs and the DIGITAL IN coaxial digital input.
If you have selected the digital input, the DIGITAL label will be lit constantly for as long as a digital sig-
nal is present at the digital input.
The DIGITAL label will flash to indicate the following conditions:
Flashing mode Status
- - - - • No cable connected to DIGITAL IN.
• Cable connected, but no signal or analog signal is present at DIGITAL IN.
-- -- -- • Cable connected to DIGITAL IN and source output, but digital signal format
is incompatible (e.g., AC3, DTS).
11.SOUND/CARD: In IVA mode, a short push (less than one second) selects three different sound pro-
grams:
NORM: Basic sound program for all types of program material.
MOVIE: Simulates the typical sound of theater speakers and is therefore recommended for videos and
DVD movies in Dolby Surround or Dolby Digital formats.
MUSIC: Linear response for a neutral sound rich in detail.
The NORM, MOVIE, and MUSIC labels are lit to indicate the selected sound preset.
By pressing and holding SOUND/CARD until the CARD label is lit you can switch the "personal ear
matching curve" (the coefficients of the outer ear transfer functions you selected) stored on an option-
al HEARO 888 DIGITAL Card into the signal path. This will adjust each SOUND preset optimally to your
personal auditory perception.
12.CHARGE: This label indicates the charging function status:
The CHARGE label illuminates to indicate the batteries inside the headphones are being charged.
Since the charging circuitry operates independently from the rest of the transmitter circuitry, the
CHARGE label will light even if the transmitter is OFF.
The CHARGE label will remain dark when no current flows from the transmitter through the charging
contacts to the batteries inside the headphones (transmitter is not connected to power, no head-
phones resting on the transmitter, no batteries inside the headphones, batteries inserted incorrectly,
contaminated charging contacts).
13.LEVEL: Indicates the signal level at the input to the audio circuitry: flickering/lighting green indicates
optimum level range, red indicates overload.
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14.INPUT LEVEL: This rotary control sets the level at the analog AUDIO IN L/R.
Selecting the digital input disables the INPUT LEVEL control.
15.DIGITAL IN: RCA input jack for a coaxial cable (supplied) for interfacing with a digital audio source
with a coaxial output.
The HEARO 888 DIGITAL is capable of processing and playing back PCM coded audio signals (stereo
PCM, D-PCM, Dolby Digital PCM) at sampling rates of 44.1 kHz or 48 kHz. Therefore, you can direct-
ly connect to DIGITAL IN either a DAT recorder or a DVD/CD player capable of playing back data car-
riers with 44.1 kHz or 48 kHz PCM signals.
16.AUDIO IN L/R: Left and right RCA audio input jacks.
17.DC 9 V: Input jack for the supplied AC adapter.
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HEARO 888 DIGITAL
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