Atec Tektronix-764 - Manual (Page 2)

Digital Audio Monitor
764
System Timing
A Digital Audio Reference input, conforming to
AES recommendations, permits 764 users to
assess timing relationships between digital
audio signals. Common problems due to
sample slipping and non-locked signals can
easily be detected.
Status and User Data
Channel Status and User data are recovered
and displayed in contiguous 24-byte blocks.
This allows the content and format of these
auxiliary data channels to be monitored.
Optional Embedded
Audio Input
Embedded audio technology simplifies routing
of video and audio signals in broadcast and
post-production facilities, but places new
demands on audio monitoring equipment. To
eliminate the need for a separate digital audio
demultiplexing step for signal monitoring, the
Option 01 Embedded Audio Input adds a serial
digital video input to the standard digital audio
inputs of the 764. Once it extracts the digital
audio signal, the 764 provides the same
comprehensive monitoring capabilities as it
does for discrete AES/EBU audio.
The 764’s Embedded Audio Input option
extracts digital audio from 270 Mb/s serial
component signals and from 143 (525 line)
Mb/s serial composite signals. Audio data
up to 20 bits at a 48 kHz sample rate is
supported.
Optional Analog Line Outputs
Many applications require listening over
loudspeakers as a part of the audio monitoring
process. In digital facilities, an audio feed is
typically routed to a digital-to-analog
converter, which drives an amplifier and
speakers. Option 02 Analog Line Output
provides the digital-to-analog conversion
within the 764, eliminating the space
requirements and expense of external
conversion devices.
The balanced line output level can be either
fixed or variable (via the headphone Volume
control) and calibrated output level settings
are selectable by internal jumpers. Jumper
settings are also available for driving
unbalanced loads at low levels. Rear-panel
AES/EBU balanced output capability is lost
when this option is installed.
Common Applications
Consoles and workstations
DAT, D1, D2, D3, etc.
Digital STL for radio
A/D testing and alignment
Digital audio routers
Signal processing
Duplication and mastering
Audio Monitors • www.tektronix.com/video_audio 2
D i g i t a l A u d i o I n p u t s 1 / 2 , 3 / 4
Connector – XLR conforming to AES3-1992 and EBU 3250-E. BNC conforming to AES3-ID.
Signal Format – Balanced, 24 data bits, 4 preamble bits, C, U, V and P bits.
MIN TYP MAX UNITS
Voltage range XLR 0.2 10 V
p-p
BNC 0.05 2 V
p-p
Impedance (0.1 to 6 MHz) XLR termination switched in 104.5 110 115.5
Ω
Return loss (0.1 to 6 MHz) XLR termination switched out 25 dB
BNC 25 dB
Sample rate range 27 52 kHz
D i g i t a l A u d i o R e f e r e n c e I n p u t
Connector – XLR conforming to AES3-1992. BNC conforming to AES3-ID.
Signal Format – Balanced, 24 data bits ignored, 4 preamble bits, C, U, V and P bits.
MIN TYP MAX UNITS
Voltage range XLR 0.2 10 Vp-p
BNC 0.05 2 Vp-p
Impedance XLR 104.5 110 115.5
Ω
BNC 71.25 75 78.75
Ω
Sample rate range 27 52 kHz