Lavry AD10 User Manual

LavryBlack Series
Model AD10
Analog to Digital Converter

Lavry Engineering, Inc.

P.O. Box 4602

Rolling Bay, WA 98061

http://lavryengineering.com

email:

[e-mail]

Rev 1.20

January 24, 2008

Quick Start Guide

The AD10’s front panel has 3 regions:

(1) The Function setting region is used to display and edit the AD10 operational settings.

(2) The Left Channel Meter region has a dual function

1. A level meter (bar graph display) for the AD10 Left channel.

2. To display and set the Left Channel Gain

(3) The Right Channel Meter region has a dual function

1. A level meter (bar graph display) for the AD10 Right channel.

2. To display and set the Right Channel Gain

To edit operational settings, press and hold the switch lever down until a cursor (blinking lamp) appears
in region 1. Region 1 is made of 4 groups (Rate, Clock, Sound, and Bits).

- Each click of the switch in the DOWN direction will move the cursor horizontally to the next available
group. Move the cursor to the group you wish to edit.

- Each click of the switch in the UP direction changes the setting vertically within the selected group.

You can change as many settings as needed, then exit region 1 edit mode. There are 2 ways to exit:

1. Press and hold the switch down until the cursor disappears (the blinking lamp lights steadily).

2. Automatic timeout: wait for 7 seconds and the unit will exit edit mode automatically.

Notes:

1. When the unit CLOCK is set to INTERNAL, the user can select the RATE group to choose an
internal sample rate of 44.1, 48, 88.2 or 96KHz. However, when the CLOCK is set to an external
clock mode (WORD or AES), the user is required to supply an external word clock to the BNC
connector located on the rear panel. For external clock (WORD or AES) the rate is not user
settable; thus it is determined by the signal applied to clock input. The user can not access the
RATE group when in external mode. Instead, when a valid external clock signal is applied; the
proper RATE lamp will indicate the sample rate.

2. When SOUND is set to CLEAR, the user can operate the AD10 at 44.1, 48. 88.2 or 96KHz, internal
or external clocks. However, setting the SOUND to Tube, Xfrm (Transformer) or Complex sound,
alters the selection to 88.2 or 96KHz conversion (internal or external). This is done to insure Digital
Alias-Free Emulation™. If so desired, the user can later sample rate convert the AD10 data to 44.1
or 48KHz. A later sample rate conversion will retain the Digital Alias-Free Emulation™ nature of the
process.

3. When SOUND is set to Tube, Xfrm, or Complex, the effect of the Digital Alias-Free Emulation™ is
level-dependent. This corresponds to the effect that tubes or transformers have on analog signals-

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they produce little coloration at low signal levels where they are more “linear,” and increasingly
color the sound as signal level rises. To hear the maximum effect of the coloration in Tube, Xfrm, or
Complex mode, the signal level must be near (but just below) full scale digital level. It is possible to
“clip” the signal in the emulation modes. As in CLEAR mode, clipping is indicated by the “0dB” lamp
illuminating on the AD10 meters.

To Edit Region 2 (Left Channel Gain), press and hold the switch UP until a cursor (blinking lamp)
appears in the Left channel bar graph. The position of the cursor indicates the gain setting using the
scale on the meters without the minus signs. For example, a blinking -6dB lamps means a gain setting
of 6dB.

- Each click of the switch in the UP direction increases the gain by 1 dB.

- Clicking the switch in the DOWN direction reduces the gain by 1dB.

After setting the left channel gain, you can either:

1. Wait 7 seconds for the unit to exit Region 2 (Left channel gain) edit mode

2. Press and hold the switch in the UP direction, until the cursor (blinking lamp) appears on the
Right channel (region 3). The cursor indicates the Right channel gain setting. You can alter
the gain (increase by 1dB by clicking the switch up, decrease the gain by 1dB by clicking the
switch down).

You can exit Region 3 (Right channel gain) edit mode by either:

1. Wait 7 seconds for the unit to exit the edit mode

2. Press and hold the switch in the UP direction, until the cursor disappears (the lamp
stops blinking)

Notes:

1. The AD10 can accommodate either XLR or ¼ inch connectors (balanced or unbalanced
signals in both cases). In the case of ¼” plugs, TRS (Tip-Ring-Sleeve) 3 conductor plugs are
typically used for balanced and TS (Tip-Sleeve) 2 conductor plugs are used for unbalanced
connections. The gain range between 0-13dB applies when using the XLR analog inputs. When
¼” plugs are used, the AD10 automatically adds 13dB of fixed gain to the adjustable gain, to
accommodate the lower level signals typical of ¼” connectors. Synthesizer line outputs, guitar
effects units with line outputs, and smaller mixers with ¼” connections are examples of this type
of signal.

2. The unit is shipped with a meter “PEAK HOLD” function enabled. The Hold keeps the highest
left channel and the highest right channel lamps lit. A quick click of the switch (Up or Down)
clears the “Hold” display and starts a new “search” for maximum levels. The user can disable the
Hold function via internal jumper. Please see the operation manual for more details.

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