Lavry AD11 Manual de usuario

LavryBlack Series

Model AD11 Stereo

Analog to Digital Converter

With

Microphone Preamplifier

Lavry Engineering, Inc.

P.O. Box 4602

Rolling Bay, WA 98061

http://lavryengineering.com

email: [email protected]

May 25, 2011

Rev 1.1

AD11 Table of Contents

Table of Contents

Subject Page

Quickstart Guide- Introduction: Line and Microphone Inputs 1

Quickstart Guide- Setting Example 2

Quickstart Guide- Diagram 1, AD11 Modes- Setting & Operation 3

Quickstart Guide- Diagram 1 Sections, Setting Controls 4

Quickstart Guide- Diagram 1 Section 2, Setting Status Display 4

Quickstart Guide- Diagram 1 Section 2, Level Display Meters 6

Quickstart Guide- Diagram 1 Section 3, GAIN Controls- Line/Mic 6

Quickstart Guide- USB Connection 6

Operation- Features and Connection 7

Operation- USB Operation 8

Operation- A. Front Panel Displays 9

Operation- B. Setting Mode- General Information 9

Operation- B. Setting Mode- Diagram 2 & Sample Frequency 10

Operation- B. Setting Mode- External Clock & Output Format 11

Operation- B. Setting Mode- +48V Phantom, Soft Saturation 12

Operation- B. Setting Mode- Meter Peak Hold 12

Operation- C. Setting & Operating Mode- GAIN Control section 13

Operation- D. Operating Mode- General Information 13

Specifications 15

Limited Warranty 16

AD11 Table of Contents

AD11 Quickstart Guide

Quickstart Guide- Introduction

Please Note: Because the AD11 uses the same XLR inputs for Line and Microphone level, it

is possible that Phantom power could be present on the input(s) if the user does not

exercise care in checking the phantom power settings and gain settings. In the vast majority

of cases, damage is very unlikely. Furthermore, because there are extensive safety features

to prevent this, it is unlikely to occur in normal usage; however:

- It is advisable to have phantom power enabled on the AD11 only when using condenser

microphones.

To familiarize yourself with the operation of the front panel controls of the AD11, it is

advisable to perform the Setting example procedure on page 2 before changing settings or

making any connections other than AC power. But first, here are some basics:

-When AC power is applied to the AD11, the unit initializes itself. First, a single LED “scans”

each row of the front panel meters, then both rows. The unit then enters a special version of

Setting Mode to display the settings and allow changes to the phantom settings for the left

and right channel’s +48V Phantom power.

-The unit then returns to Operating Mode.

For more details, please see the section titled “phantom (+48V Phantom Power for

Condenser Microphones)” in the Operation section of the manual on page 12.

All switches on the AD11 are spring-loaded three position toggles that automatically return

to the center (no function) position. They are: (forward-back), Exit-Set, and Up-Down.

The front panel LEVEL meters change modes; in Operating mode they serve as output level

meters and the numbers above the display indicate the peak level in dB’s below “0dB full

scale digital” (0dBFS). In Setting mode the legend below the display applies, and the bottom

row of LED’s (labeled “right”) indicate the status of most settings. However, for individual

channel settings the top row indicates the left channel setting, or for external clock

operation; “lock” to an external sync source. This also means that the cursor may move

vertically between the top and bottom row of LED’s to access the left and right channel

settings, in addition to moving left or right. For this reason, the direction of the cursor’s

movement will be referred to as “forward and back.” Please see Diagram 2 on page 10 for

more detailed information.

The two switches under the SELECT legend are used to change basic

settings.

- In Operating mode, click the (forward-back) switch down to enter

Setting mode. A flashing LED appears as a “cursor” in the “LEVEL”

display to indicate which setting can be changed.

-The AD11 is now in Setting mode and the display under the LEVEL

legend has changed modes from level meter to displaying the setting

status.

- The switch now moves the cursor forward or back as indicated by the arrows. Clicking

the switch down is “forward” and up is “back.”

- The right switch toggles the setting at the cursor position “On” or “Off” when the switch is

clicked down in the “set” direction. For single selections, repeated clicks in the set direction

will toggle the function “On” or “Off”with each click.

- Some settings require at least one selection to be “On” at all times (Sample Frequency &

Output Format). Once any of these settings is “On,”clicking setrepeatedly has no effect.

- Click the right switch up towards “exit” to exit the Setting mode.

Please see the Setting Example (next page).

AD11 Quickstart Guide

Quickstart Guide- Setting Example

This procedure assumes settings have not been changed from the factory defaults, which are:

44.1 kHz Sample Frequency (SF), spdif output format “on,”meter peak hold “on.”

1) Turn the AD11 power “on” and wait for the initialization to complete (meters stop moving

sequentially, setting status finishes being displayed, and display reverts to Meter mode).

2) Enter Setting mode by clicking the switch in the down direction.

The default Setting mode display looks like this (where symbolizes a rapidly flashing cursor):

3) A rapidly flashing cursor appears at the first position on the left (44.1) indicating it is “On.”

4) Click the switch down three times and a slowly flashing cursor appears at “96”(slow = Off).

The LED above 44.1 will illuminate constantly to indicate it is “On.”

5) Click the right (“exit-set”) switch down towards “set” and the cursor will begin flashing rapidly to

indicate that 96 (kHz) is “On.” The LED above “44.1” will go dark (44.1 is now “Off”).

6) Click the switch down three times to position the flashing cursor above the aes legend. The

LED above 96 will stop flashing and stay illuminated.

7) Click the right switch down towards “set” and the cursor will change from flashing slowly to flashing

rapidly to indicate that aes (digital output format) is now selected. Because the aes and spdif

settings are also interlocked, the spdif LED will also go dark.

8) Click the switch down three times until the cursor appears in the left (upper) row of LED’s

above the phantom legend. Please note how the cursor goes to the right (lower) row of LED’s

before moving to the left row. This is because there are individual settings for left and right

channel.

9) Click the right switch down towards set; the cursor will change from flashing slowly to flashing

rapidly to indicate the phantom (+48V power) is now “enabled” for the left channel only.

10) Click the switch down three times until the cursor appears above the hold legend. Click the

right switch towards set and the cursor will change from flashing rapidly to flashing slowly to

indicate that the peak hold function has been turned “off.”

The display should look like this (where symbolizes a slowly flashing cursor):

96kHz SF, AES output format, phantom power enabled left channel, meter peak hold “off”

Hint: To double-check if a setting is correct, use the switch to move the cursor away from the

setting you just changed to see if its LED indicator is “On” or “Off”(instead of flashing).

11.) Click the right switch up towards “exit” to exit the Setting mode. The settings have been stored in

memory and the AD11 is now in Operating mode.

12.) Now that you are familiar with the Setting mode, you can re-enter setting mode and configure the

AD11 for the settings you normally use. It is advisable to disable phantom power unless you plan

to use a condenser microphone with the AD11 the next time power is applied. The default

settings can be used safely for initial operation.

13.) Please see the CONNECTIONS section of the manual before using the AD11.

AD11 Quickstart Guide

Quickstart Guide- Settings and Operation

The AD11 front panel has three sections: (Diagram 1)

When AC power is applied to the AD11, the unit initializes itself. First, a single LED “scans”

each row of the front panel meters, then both rows. The unit then enters a special version of

Setting Mode to display the settings and allow changes to the phantom settings for the left

and right channel’s +48V Phantom power. The unit then returns to Operating Mode. For

more details, please see the section titled “phantom (+48V Phantom Power for Condenser

Microphones)” in the Operation section of the manual on page 12.

- Please use caution when changing settings. Although the AD11 changes its digital

outputs “gracefully;” it is not possible to predict how a device the AD11 is feeding

will react. For this reason; it is advisable to lower your monitor speaker volume to

avoid possible speaker damage prior to changing any settings.

AD11 MODES

The AD11 has two modes- the Operating Mode and the Setting Mode.

- In Operating mode, the front panel displays the level of the digital output signal in the

meters below the LEVEL legend (as shown on Page 7). The legend above the window

applies in this mode (-42 through 0) to indicate dB level below 0dB full scale digital level

(0dBFS). The GAIN display indicates the setting of the left or right channel when the

up/down switch for that channel is actuated, and for approximately 10 seconds afterwards.

The GAIN display then reverts to displaying “LE.” A quick “click” of either channel’s up/down

switch will display the stored setting for that channel without changing it. Please see

“Diagram 1, Section 3 Gain Controls”(page 6) for details on the behavior of the GAIN

control; including when switching between Line and Mic range. The GAIN control is always

active in both Operating and Setting modes; but is most likely to be used in Operating mode.

- In Setting mode (as illustrated above in Diagram 1), status of the settings is displayed as

well as the position of the cursor in the LEVEL display section. The legend below the

window applies in this mode (44.1, 48, wc, sat, etc). The position of the cursor is denoted by

the flashing LED. For settings at the cursor position, a rapidly flashing cursor means the

setting is “On” and a slowly flashing cursor means the setting is “Off.” At all other positions, if

the LED is illuminated the setting is “On,” and if the LED is dark the setting is “Off.”

- If the function has a left and right setting, the left setting is on the upper row (“left channel

meter” in Operating mode) and the right channel setting is on the lower row (“right channel

meter” in Operating mode).

- When an external clock setting is selected, the LED in the upper row directly above the

type of sync will indicate “lock” to the external signal. The two types of sync are “wc” for

Word Clock or “dig-a” for AES or SPDIF sync. If the AD11 is not “locked,” or there is no

signal present on the sync input, the LED in the upper row above wc or dig-a remains dark.

AD11 Quickstart Guide

- Exiting Setting Mode causes the settings to be stored in non-volatile memory. This means

the AD11 will retain the settings even if the AC power is turned “off.” Any time the GAIN

display reverts to the “LE” symbol, the Gain settings are also stored.

Diagram 1, Section 1- Setting Controls

The two switches under the SELECT legend on the left side of panel control the Setting

mode of the AD11. The first switch labeled with the symbols has two functions:

- Clicking the switch down in the Operating mode causes the AD11 to enter Setting mode. A

flashing cursor and indicators for settings that are “on” will appear in the LEVEL display

window. The legend under the window apply in this mode (44.1, 48, wc, etc.).

- While in Setting mode, clicking the switch down moves the cursor forward to the next

position and clicking the switch up moves the cursor one step back to the previous position.

- For convenience, the position of the cursor is retained when exiting Setting mode. The

cursor will appear at the same position when Setting mode is re-entered to allow easy

access to the same setting. The exception is when the unit is first powered; in this case the

cursor always appears at 44.1 (the first position).

The second switch is labeled “exit” and “set”and when in Setting mode:

- Clicking the switch down (set) toggles the function On or Off. For single selections, the

function is toggled On or Off every time the switch is “clicked” in the set direction.

- In the case of selecting a sample frequency (SF); the SF at the cursor position is enabled

and all other SF’s are disabled the first time the switch is clicked in the set direction.

Subsequent set “clicks” have no further effect.

- In the case of selecting digital output format (aes or spdif), the setting at the cursor

position is enabled and the other one is disabled the first time the switch is clicked in the set

direction. Subsequent set “clicks” have no further effect.

- Clicking the switch up (exit) immediately exits the Setting mode.

After exiting the Setting mode, clicking the switch in either direction has no effect on

settings. If the meter Peak Hold function is enabled, a set click clears the held value.

Diagram 1, Section 2- Settings Status Display (only in Setting mode)

In Setting mode, the LED’s above each label indicate the status of each setting. The cursor

position affects the way an LED indicates the status.

- At the cursor position, a rapidly flashing LED indicates “on” and a slowly flashing cursor

indicates “off.”

- At all other positions, a steadily illuminated LED indicates “on,” and an LED that is not

illuminated indicates “off.”

- Please note that in the following Setting mode function descriptions, the distinction

between whether or not the LED is at the cursor position may be omitted for clarity.

- Sample Frequency selection. This consists of the 44.1, 48, 88.2, and 96 labels and the

LED’s above them. Only one sample frequency (SF) can be selected at any time.

- If the cursor is positioned at the selected SF, the LED flashes rapidly.

- If the cursor is positioned at an SF that is not selected, the LED flashes slowly.

- When the cursor is at a different position than the selected SF, the LED for the selected SF

is constantly illuminated while the LED for the cursor flashes slowly. Clicking the set switch

will enable the SF at the cursor position and disable the previously selected SF (the

constantly illuminated LED will go dark and the cursor will flash rapidly).

- Once an SF is selected and the cursor is still at that position, subsequent set clicks have

no effect (one SF setting will always be selected).

AD11 Quickstart Guide

- External Word Clock. This setting enables synchronization to an external Word Clock

signal at the Sample Frequency set in the SF section (above). The LED in the “left channel”

row” above wc indicates “Lock” to an external Word Clock signal. Please see Diagram 2 on

page 10 for more details- the wc Lock indicator is labeled “a” in Diagram 2.

- If the external wc function is “On” as indicated by the LED, the AD11 will lock to TTL level

sample-period Word Clock signals applied to the “clock in” BNC connector on the rear

panel. The Sample Frequency (SF) of the Word Clock signal must match the AD11’s SF.

- If the wc setting is “off,” the AD11 will not lock to external Word Clock inputs.

Like other functions in the Setting mode, if the cursor is positioned at the wc LED, it will

flash rapidly to indicate that the function is “on.” Clicking the set switch once will disable

external WC functions and this will be indicated by a slowly flashing LED. When the cursor is

at another position, the LED is “off” (not illuminated) when the WC function is “off,” and the

LED is “on” when the function is “on.”

- The wc and dig-a functions are interlocked so that only one can be enabled at any time.

However; they both can be “Off.”

- External AES/SPDIF Sync- The setting designated “dig-a”(digital audio) enables

synchronization to an external AES or SPDIF signal at the Sample Frequency set in the

AD11’s SF section (above). The LED in the left row above dig-a indicates “Lock” to the

external AES or SPDIF signal. This LED is labeled “b” in Diagram 2.

- If the external dig-a function is “On” as indicated by the LED, the AD11 will lock to either

an AES or SPDIF digital audio signal applied to the “clock in” BNC connector on the rear

panel.

- If the dig-a setting is “off,” the AD11 will not lock to external AES or SPDIF sync inputs.

- Use of a digital audio signal that contains “muted audio” (“digital black”) is recommended

as an external sync signal to minimize jitter effects. AES sync is preferable to SPDIF sync.

- aes and spdif. These settings determine the configuration of the digital output format. The

digital audio signal from both the XLR and RCA digital outputs will contain the same digital

code format, as determined by these settings. The output format must be either AES or

“SPDIF” (IEC 60958 type II), and the setting function is interlocked so that one of the two

settings is always active.

- phantom. This function is controlled separately for each channel, and automatically

becomes inactive for gain settings of 12dB or less. The +48V phantom power function is

enabled on the left channel input when the left channel LED is on, and is enabled for the

right channel input when the right channel LED is on (for gain settings from 20 to 65dB).

Please Note: Phantom power turn “on” is ramped to minimize the possibility of

damage to ribbon microphones. However, caution is still advised when using ribbon

microphones with the AD11, especially vintage ribbon microphones.

-sat. The AD11 features Lavry’s exclusive digital tape saturation emulation (“Soft

Saturation”) which can be enabled and disable separately for each channel. This function

provides peak level control without attack and release times, and automatically adds 3 dB’s

of gain to the digital output for signals below “-3dBFS.”

- When this function is enabled, signals below “-3” on the AD11’s meters are completely un-

altered (linear), and signal peaks above this level are progressively “rounded-off” in a

manner similar to analog tape saturation.

- Internally, signals that would normally reach “0dBFS” are reduced to -3dBFS, thus allowing

the sat function to raise the average signal level by 3 dB’s (for signals below the “saturation

threshold”). This also causes the peak digital output level to be restored to “0dBFS.” As a

result, it is still possible to “clip” the output signal if this input signal level is exceeded.

AD11 Quickstart Guide

In other words, the same analog input level will result in digital “clipping;” but the average

output level of typical music program will be 3dB’s louder.

- The left row LED indicates the status of the left channel sat setting, and the right row LED

indicates the status of the right channel sat setting.

- hold. This setting enables and disables the LEVEL meters’ peak hold function. In

Operating mode when hold is enabled, a single LED representing the highest peak level

stays illuminated on each channel until the exit/set switch is clicked in the set direction.

Diagram 1, Section 2- LEVEL DISPLAY METERS (Operating mode)

This section displays the digital level of the output signal of the AD11 in decibels referenced

to “Zero dB Full Scale”digital level (all bits “On”) which will be referred to as “0dBFS.” The

numbers above the display apply in Operating mode (-42, -36, …, 0) and represent the peak

signal level in dB’s below 0dBFS. Just to the left of the display, the legends left and right

indicate which input channel the meters display.

Diagram 1, Section 3- GAIN CONTROLS (Setting and Operating Mode)

This section contains the GAIN display and separate “up/down” switches for the left and

right channels.

- The up/down switches always control the gain in both Operating and Setting modes.

- The display can show the gain setting for either channel. The gain for each channel is

displayed when the up/down switch for that channel is activated, and for approximately ten

seconds afterwards. The GAIN display then reverts to “LE” to indicate that the GAIN settings

have been stored in non-volatile memory.

- Because the same GAIN controls are used for both Line level and Microphone inputs,

there are two different GAIN ranges. The range from 0 to 12dB of gain is for line level inputs,

and the range from 20 to 65dB is for microphones or other balanced low-level, low

impedance sources. The GAIN display will STOP changing and flash before the GAIN is

changed from 12db to 20dB, or from 20dB to12dB to indicate the change in operating

modes. It is necessary to release the GAIN toggle switch, wait for the display to stop

flashing, and then press it again to transition from one range to the other. Please see the

Operating section of the manual for more details. For clarity, the condition “within the Line or

Mic range” may be omitted (below).

- If “LE” appears in the GAIN display and the up/down switch is “clicked” once, the GAIN

setting for that channel is displayed without change to the setting. If the display has not

reverted to “LE” and the same switch is clicked again, or held (either up or down), the gain

setting will change.

- If the numerical GAIN setting is displayed and the switch for the other channel is clicked

once, the setting for the other channel is displayed without change.

- If the numerical Gain setting is displayed, and the switch for that channel is clicked once,

the gain changes by one dB. There is an “acceleration” function, so when the switch is held,

the gain setting changes slowly at first, and then more rapidly the longer the switch is held.

- The GAIN display shows “LE” at other times to indicate that the settings have been stored

in memory. Again, to simply check the Gain setting for each channel, click that channel’s

up/down switch once. The setting will be displayed without change from the stored value if

“LE” is displayed, or the other channel’s numerical gain setting was being displayed.

USB Connection- Please see “USB Operation” in the Operation section of the manual (on

page 8) for more details on computer audio settings. The AD11 appears as a Core Audio

input device in Apple OSX and a WDM input device in Windows OS. ASIO4ALL can be

used with PC’s with ASIO compliant recording software.

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