User manual

AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information

The 919068 (SDI to analog converter PCB) allows selected Wohler Technologies audio monitoring systems to be connected

directly to a serial digital (SDI) video signal containing embedded audio. Two levels of component signals (eg., D1, D5, and Digi

Betacam type) are currently supported; synchronous audio at 48 KHz with either 20-bit data packets or audio and extended data

packets. The 919068 demultiplexes (extracts) the audio data from the video data, and converts it to analog.

In the AMP2-VS and AMP2-VSA models, SDI channels one and two (first subgroup) and channels three and four (second

subgroup) from Group I.D. #1 are demuxed for conversion to analog. Access to SDI Group I.D. #2, #3, or #4 is optional and

may be specified at the time of order.

SDI to Analog Converter Module PCB (919068 PCB)

919068 Specifications

Input characteristics:

Receiver type:

Sensitivity performance:

SDI input level:

Input formats:

Audio sampling rate:

SDI output type:

SDI output:

SDI output level:

Max. output of analog out:

Analog out (of digital source),

S/N:

THD (full output):

D to A gain calibration,

(dB = dBFS):

Error Indication:

75 Ohm (BNC), AC coupled, 15 dB minimum return loss, 10-270 MHz

Auto equalizing with clock regeneration

Tolerates cable loss of at least 30 dB @ 135 MHz

400 - 1000 mV

Component, either 525 or 625 lines w/ 48 KHz audio

48 KHz

Fully regenerated copy of SDI input signal (equalized and regenerated,

scrambled NRZI)

15 dB minimum return loss, risetime 0.75-1.5 ns (20-80%)

800 mV +/-10%

+24 dBv (0 dBv = 0.775 vRMS)

Greater than 96 dB

Less than 0.008%

+8 = -20, +4 = -20, +6 = -9, 0 = -18 (DIP switch selectable)

Bi-color LED (red/green)

Off = no signal

Green = signal present

Red = Error