Ensemble Designs BrightEye 90-F HD Up/Down Cross Converter and ARC with AES Audio and Optical Output - Manual (Page 38)

Oversampling
A technique to perform digital sampling at a multiple of the required sample rate.
This has the advantage of raising the Nyquist Rate (the maximum frequency
which can be reproduced by a given sample rate) much higher than the desired
passband. This allows more easily realized anti-aliasing filters.
PAL
During the early days of color television in North America, European
broadcasters developed a competing system called Phase Alternation by Line.
This slightly more complex system is better able to withstand the differential
gain and phase errors that appear in amplifiers and transmission systems.
Engineers at the BBC claim that it stands for Perfection At Last.
Pathological Test Pattern – see Checkfield
Progressive
An image scanning technique which progresses through all of the lines in a frame
in a single pass. Computer monitors all use progressive displays. This contrasts
to the interlace technique common to television systems.
Return Loss
An idealized input or output circuit will exactly match its desired impedance
(generally 75 ohms) as a purely resistive element, with no reactive (capacitive or
inductive) elements. In the real world, we can only approach the ideal. So, our
real inputs and outputs
will have some capacitance and inductance. This will create impedance matching
errors, especially at higher frequencies. The Return Loss of an input or output
measures how much energy is returned (reflected back due to the impedance
mismatch). For digital circuits, a return loss of 15 dB is typical. This means that
the energy returned is 15 dB less than the original signal. In analog circuits, a 40
dB figure is expected.
RGB
RGB systems carry the totality of the picture information as independent Red,
Green, and Blue signals. Television is an additive color system, where all three
components add to produce white. Because the luminance (or detail) information
is carried partially in each of the RGB channels, all three must be carried at full
bandwidth in order to faithfully reproduce an image.
ScH Phase
Used in composite systems, ScH Phase measures the relative phase between the
leading edge of sync on line 1 of field 1 and a continuous subcarrier sinewave.
Due to the arithmetic details of both PAL and NTSC, this relationship is not the
same at the beginning of each frame. In PAL, the pattern repeats ever 4 frames
(8 fields) which is also known as the Bruch Blanking sequence. In NTSC, the
repeat is every 2 frames (4 fields). This creates enormous headaches in editing
systems and the system timing of analog composite facilities.
SDI
Serial Digital Interface. This term refers to inputs and outputs of devices that
support serial digital component
BrightEye 90-F - Page 38
BrightEye 90-F HD Up/Down/Cross Converter And ARC With AES Audio And Optical Output