Avid Technology Digidesign USD User Manual page 22

4. Sample Rate LEDs
Green LEDs show the current USD sample
rate.
The table below shows how the four Sam-
ple Rate LEDs indicate the current USD
sample rate.
USD LED Displays and Sample Rates
USD LEDs ON
44.1 kHz
48 kHz
44.1 kHz and
PULL UP
44.1 kHz and
PULL DOWN
48 kHz and
PULL UP
48 kHz and
PULL DOWN
PAL format and PULL UP/DOWN
The USD Pull Up and Pull Down features
are not designed to perform conversions
between 24 fps and 25 fps.
5. Set, Down, Up, Run/Stop+Clear
Generator/Parameter Controls
These four momentary switches provide di-
rect access to many USD functions, includ-
ing time code generator settings,
PAL/NTSC selection, sample rate and more.
The LED display shows the current mode,
or currently selected parameter or setting.
18 Universal Slave Driver
Sample Rate
44.100 kHz
48 kHz
44.144kHz
44.056kHz
48.048 kHZ
47.952 kHz
6. LED Time Code Display
This 7-segment, multifunction LED is the
USD time code and parameter display.
Time Code The current positional refer-
ence (internal or external), is displayed in
hours:minutes:seconds:frames. Decimal
points indicate additional time code infor-
mation:
• Odd/even field distinction is indicated
using a decimal point to the right of the
frames display. A lit decimal point to the
right of frames indicates an even-num-
bered field; no decimal point indicates
odd-numbered.
• When the USD is in Auto Switch
LTC/VITC mode, the decimal point to
the right of "minutes" illuminates.
Parameters and Values When configuring
the USD with the Set, Run/Stop and other
parameter controls, the LED display shows
parameter names, values, and other data.
For a table identifying each LED abbrevia-
tion and function, see "Parameters" on
page 55.
7. Positional Reference Switch
Selects the USD positional reference.
Choices include:
LTC
VITC
Auto Switch LTC/VITC
BI PHASE
GENERATE