Sierra Video 507140 User Manual

Sierra Video Systems Digilinx Audio Analog to Digital Converter

The Sierra Video Systems 507140 contains 2 identical stereo 24 bit Analog to Digital Converters. Each
converter has full differential inputs and both AES and SPIF outputs are available. The converters can be
locked to an external AES audio stream or used free running using an extremely stable internal oscillator
with selectable sample rates of 32Khz, 44.1Khz, and 48Khz.

Input and Output Connections:

Looking at the back panel of the module, here are the electrical connectors for the card;

A Channel A Channel B Channel External B Channel
Output Output Inputs Inputs Ref Output Output
SPIF AES AES SPIF

For each input connector, the pin outs are;

Left Channel Right Channel

- +

Jumper Settings:

For each output terminal connector, and the external reference input, the pin outs are;

+

• Jumper Definitions:

The Following Graphics are used to describe the jumper setting on the board.

Indicates that a Suite Case Jumper is installed on the indicated header
Indicates that there is NO jumper installed on the indicated header

•

Sample Rate Adjustment

JP13 is used to change the internal Sample Rate Clock for this board. Both Channel A and
Channel B use the same sample rate clock.

48 KHz sample rate

32 KHZ sample rate

44.1 KHz sample rate

INVALID setting - do not use

Gnd Gnd

Gnd

-

:

- +

• Output Impedance Adjustment:

The Output impedance can be adjusted separately for the A Channel and the B Channel.
JP4, JP5, and JP6 control the A Channel while JP7, JP8 and JP9 co ntrol the B Channel. Either
output can be set to either a 110 ohm output @ 5 volts peak to peak or 75 ohms @ 1 volt peak to
peak. The output signal is simultaneously available on both the BNC and terminal strip
connectors, however when operating with a 110 ohm output impedance the signal on the BNC is
1/2 amplitude as compared with the terminal strip.
JP4, JP5, and JP6 form the same pattern as JP7, JP8, and J9 on the board and the suite case
jumpers are set in the same pattern for each set of these connectors.

110 ohm Output 75 ohm Output

JP6 (or JP9) JP6 (or JP9)

JP4 (or JP7) JP4 (or JP7)

JP5 (or JP8) JP5 (or JP8)