Ensemble Designs BrightEye 57 3G/HD/SD/Analog Test Signal and Sync Pulse Generator - Manual (Page 7)

www.ensembledesigns.com BrightEye 57
TM BrightEye 57 3G/HD/SD/Analog Test Signal and Sync Pulse Generator User Guide
Page 7
Functional Description
External House Reference or Internal Precision Standard Reference
The BrightEye 57 can lock to an external house reference or it can lock to its own internal precision
standard reference.
The Ref In BNC on the rear of the unit will accept 1 V P-P PAL, NTSC, 10 MHz or Tri Level Sync as a
reference. The outputs will all be synchronous relative to this reference. The overall vertical and
horizontal timing of the outputs can be adjusted in the BrightEye PC or Mac Timing menu. Reference
status is reported on the front of the unit and in BrightEye PC or Mac. The Composite video output will
have the same ScH phase (or color framing) as the external reference.
A special case exists when simultaneously using PAL and NTSC. If the output standard for the module
is PAL and an NTSC reference is connected, BrightEye 57 will lock to the reference at the fundamental
clock frequency common to PAL and NTSC. This is referred to as “clock-locked.” There is no horizontal
and vertical relationship but BrightEye 57 will have the same frequency accuracy as the reference and
the AES audio output will be synchronous simultaneously to the BrightEye 57 PAL output and the
NTSC reference. The same case is true for an NTSC standard with a PAL reference.
Temperature Compensated Oscillator
When no external reference is connected to the unit, the fundamental clock source for BrightEye 57
is taken from a temperature compensated oscillator which guarantees frequency accuracy to within
1 cycle of subcarrier (better than 0.2 ppm) across the full operating temperature range. In addition,
because it does not require a crystal oven, BrightEye 57 is accurate immediately upon power up. This
ensures that the BrightEye 57 outputs meet the most stringent standards.