Specifications

AD-1000 Operating Manual
Locking to an NTSC Video Sync Source
Connect the video reference to one of the BNC connectors on the rear panel. Termination is not necessary if
looping to another device and the last device in the chain is terminated with 75Ω.
NOTE: The video must be
correctly terminated for proper AD-1000 sync operation. 75Ω termination is available by switching a DIP switch
on the top of the AD-1000. Select switch position 1 to ON for 75Ω termination.
(Additional information on this
switch is available on
page 31.) Alternatively, a 75Ω BNC termination can be connected to the unused BNC con-
nector. Select NTSC video on the sync source selector and choose the sample rate with the sample rate selec-
tor. Illumination of the appropriate sample rate LED indicates sample rate lock to the external video source.
Locking to a PAL Video Sync Source
Connect the video reference to one of the BNC connectors on the rear panel. Termination is not necessary if
looping to another device and the last device in the chain is terminated with 75Ω. NOTE: The video must be
correctly terminated for proper AD-1000 sync operation. 75Ω termination is available by switching a DIP switch
on the top of the AD-1000. Select switch position 1 to ON for 75Ω termination.
(Additional information on this
switch is available on
page 31.)
Select PAL on the sync source selector and choose the sample rate with the sample rate selector. Illumination
of the appropriate sample rate LED indicates sample rate lock to the external video source.
Locking to a 60 Hz Video Source (used in CD premastering)
The AD-1000 has two additional sync source selector positions. These two positions generate the seven output
sampling rates from a monochrome video sync source. Monochrome refers to 525 line/60 Hz video. These sync
sources can also be used with NTSC video when the need to “bump-up” or “bump-down” is required. The
effect will be the same as using the 1.001 positions with a monochrome sync signal.
Opposite is a matrix that summarizes all of the possible sync combinations. Those combinations that are “ille-
gal”, such as 48.048 locked to NTSC will blink the three sample rate indicators to indicate an error in the setup.
Digital Audio Output Format and Selection
The AD-1000 features many different digital audio output formats. The front panel power switch is a three posi-
tion switch located on the front upper right hand corner of the AD-1000. The center position selects power OFF.
The other two positions select either NORM or ADAT output format. The selected output format appears at
the AES (male XLR), S/PDIF 15 pin HD connector and OPTICAL (optical plug nearest the edge of unit) outputs
simultaneously with the appropriate format, level and impedance. For example, with the front panel switch
selected to NORM, the XLR will output AES and the S/PDIF and OPTICAL outputs will output S/PDIF format.
The AES output will be +4 volts pk-pk/balanced, unterminated, and the S/PDIF output will be 0.5 volts pk-pk
/75Ω/balanced (S/PDIF will drive balanced and unbalanced loads). When selected to ADAT, output is ADAT for-
mat on optical, with “Audio Black” clock signal (no data bits) output on the AES and S/PDIF outputs.
AES/EBU – Professional digital audio transmission format.
Transformer-isolated balanced line output to a three-wire transmission line.
Output Impedance: 110Ω
Signal amplitude: 4.4 Volts peak to peak into 110Ω
Sampling Rate Range: 32–54kHz
Connector: male XLR mounted on rear panel, pin 1 ground; pins 2 & 3 signal
Note: Polarity of pins 2 and 3 is not important. Reversing pins 2 and 3 will not affect the digital audio trans-
mission because the format is insensitive to polarity.
Page 28