Apogee AD-8000 Specifications download pdf (Page 14)

Example: Let’s say you have a DA-88 tape you would like to transfer into Pro Tools, but to save time you

want to try a guitar part on track 8 while it’s going.

1. Bus the guitar channel on your console to analog input 8 on the AD-8000.

2. Select your digital source with the SOURCE button – e.g. if the DA-88 is connected to an AMBus card that

is in slot “A”, select AMBUS A.

3. Press the DIGITAL IN button, then press CHANNEL SELECT buttons 1 through 6.

The channel routing shows the AMBUS A LEDs 1 through 6 and ANALOG LEDs 7 & 8 lit. The DEST (“des-

tination”) display indicates AES/SPDIF and all AMBus slots with cards installed other than AMBUS A. The

AD-8000 outputs to all available destinations simultanously, doing whatever format conversion is necessary.

4. And off you go! Oh… you may want to tune that guitar up a bit first!

Calibrate

To calibrate the analog inputs, do the following:

1. Get a 1 kHz tone up on your console’s output buses at exactly 0 VU on its meters.

2. Press the CAL ±1dB button.

3. Select a headroom setting with the headroom selector button (–12, –14… –20). –16 is pretty much standard

for digital multitracks, but if you use Soft Limit, you can crank it to –14 or even –12 if you want to get more

level on to tape. You may want to experiment with different headroom settings to find what suits your

recording needs.

4. The 7-segment displays will now indicate how many dB you are above or below the selected reference level.

“–” indicates that you are 10 dB or more above or below the selected reference level. “Above” is indicat-

ed by the 0 dBFS LED being illuminated, while “Below” is indicated by the illumination of the –50 dBFS LED.

5. Adjust the trim-pot on the selected channel (next to the appropriate CHANNEL SELECT button) until the

number indicated in the 7-segment display reaches “0”.

6. Now tweak each channel so that the middle LED (at “0.0” on the left side of each meter) is lit. In this mode,

the entire range of the meter becomes 2 dB, each segment representing one tenth of a dB, so the channel

is now calibrated to within 0.1 dB of the selected reference level.

Oscillator

The AD-8000 has a built-in digital oscillator, selected by holding the OSCILLATOR button down for at least

one second (to prevent potentially painful accidents), that generates a sine wave at 1 kHz and puts it across all

eight digital outputs, including all AMBus cards, at the selected headroom setting. This is useful for quickly

checking digital connections and routing, and also for recording an extremely accurate alignment tone at the

head of your project tape, for setting playback levels. Pressing the button again turns the oscillator off.

The oscillator level can be set to any one of the five different reference levels, which are selected by repeat-

edly pressing the headroom select button until the desired headroom setting is displayed.

The oscillator can be locked to internal crystal, or to any other external sync source. The frequency of the

tone will vary in proportion to the sample rate: for example, at 44.1 kHz, the oscillator tone is 1.00 kHz, while

at 48 kHz it is 1.09 kHz.

Storage of Front Panel Settings

The front panel settings on the AD-8000 are stored automatically on power-down and are remembered for

the next time you turn the unit on, when they are recalled automatically. If you do not wish to restore the pre-

vious settings on power-up, hold the OVERS button down during the power-up sequence. And, incidentally, if

the power-on “Apogee wave” gets boring, you can skip it by holding the CLEAR METERS button down during

power-up.

AD-8000 Operating Manual

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Apogee AD-8000 Specifications Page 14

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