Linear Timecode Encoder

SMPTE LTC Generator (BETA)

The SMPTE LTC Generator component generates a Linear Timecode (LTC) audio signal, per the SMPTE 12M specification.

A start time can be entered into the Hours, Minutes, Seconds and Frames fields. Drop Frame mode can be enabled and the OTWP button can be used to Output Timecode While Paused. The generator stops when the time reaches 23:59:59:29. When stopped, the time fields return to the most recently entered start time.

You can connect the Control Pins of the generator to a Control Script component with an appropriate Lua script to control the generator.

You can connect the generator output to one or more local or networked Q-SYS SMPTE LTC Readers or analog and/or digital output(s).

Controls

Control	Function	Default/Range
Hours	Counts the number of elapsed hours and allows for manually entering the hours.	0 - 23
Minutes	Counts the number of elapsed minutes and allows for manually entering the minutes.	0 - 29
Seconds	Counts the number of elapsed seconds and allows for manually entering the seconds.	0 - 59
Frames (fps)	Counts the number of elapsed Frames and allows for manually entering the frames.	0 - 29
Drop Frame	The Drop Frame toggle button enables "drop-frame" mode in which frames are periodically dropped to stay in sync with wall clock time.	Off/On
Start	Starts the timecode count from the numbers entered, or from zero if nothing has been entered.	Off/On
Stop	Stops the timecode count. After stopping the count, if the Start button in pressed, the timecode count starts at the numbers originally entered or zero if nothing was entered.	On/Off
Pause	Pauses the timecode count. When restarted the count resumes at the time it was stopped.	Off/On
OTWP	The Output Timecode When Paused (OTWP) toggle button causes the timecode, at which the Writer was stopped, to be repeatedly output when the counter is paused.	Off/On

Control

Function

Default/Range

Hours

Counts the number of elapsed hours and allows for manually entering the hours.

0 - 23

Minutes

Counts the number of elapsed minutes and allows for manually entering the minutes.

0 - 29

Seconds

Counts the number of elapsed seconds and allows for manually entering the seconds.

0 - 59

Frames

(fps)

Counts the number of elapsed Frames and allows for manually entering the frames.

0 - 29

Drop Frame

The Drop Frame toggle button enables "drop-frame" mode in which frames are periodically dropped to stay in sync with wall clock time.

Off/On

Start

Starts the timecode count from the numbers entered, or from zero if nothing has been entered.

Off/On

Stop

Stops the timecode count. After stopping the count, if the Start button in pressed, the timecode count starts at the numbers originally entered or zero if nothing was entered.

On/Off

Pause

Pauses the timecode count. When restarted the count resumes at the time it was stopped.

Off/On

OTWP

The Output Timecode When Paused (OTWP) toggle button causes the timecode, at which the Writer was stopped, to be repeatedly output when the counter is paused.

Off/On

Properties

Property	Function	Choices
Frame Rate (fps)	Sets the number of frames per second.	24 25 30 Pull-Down 30

Property

Function

Choices

Frame Rate

(fps)

Sets the number of frames per second.

30 Pull-Down

Control Pins

Pin Name	Value	String	Position	Pins Available
Drop Frame	0 1	disabled enabled	0 1.00	Output
Frames In ¹	0 -29	0 - 29	0.00 to 1.00 ²	Input/Output
Frames Out ¹	0 - 29	0 - 29	0.00 to 1.00 ²	Output
Hours In ¹	0 - 23	0 - 23	0.00 to 1.00 ²	Input/Output
Hours Out ¹	0 - 23	0 - 23	0.00 to 1.00 ²	Output
Minutes In ¹	0 - 59	0 - 59	0.00 to 1.00 (0.017 increments)	Input/Output
Minutes Out ¹	0 - 59	0 - 59	0.00 to 1.00 (0.017 increments)	Output
Output Timecode When Paused	0 1	disabled enabled	0 1.00	Input/Output
Pause	trigger	Input/Output
Paused	0 1	false true	0 1.00	Output
Seconds In ¹	0 - 59	0 - 59	0.00 to 1.00 (0.017 increments)	Input/Output
Seconds Out ¹	0 - 59	0 - 59	0.00 to 1.00 (0.017 increments)	Output
Start	trigger	Input/Output
Started	0 1	false true	0 1.00	Output
Stop	trigger	Input/Output
Stopped	0 1	false true	0 1.00	Output
1. Frames, Hours, Minutes, and Seconds each have an "In" control pin for setting the time, and each have "Out" control pins for reading the output of the counter. 2. The increments in the position control depend on the number of frames per second.

Pin Name

Value

String

Position

Pins Available

Drop Frame

disabled

enabled

1.00

Output

Frames In ¹

0 -29

0 - 29

0.00 to 1.00 ²

Input/Output

Frames Out ¹

0 - 29

0.00 to 1.00 ²

Output

Hours In ¹

0 - 23

0.00 to 1.00 ²

Input/Output

Hours Out ¹

0 - 23

0.00 to 1.00 ²

Output

Minutes In ¹

0 - 59

0.00 to 1.00

(0.017 increments)

Input/Output

Minutes Out ¹

0 - 59

0.00 to 1.00

(0.017 increments)

Output

Output Timecode When Paused

disabled

enabled

1.00

Input/Output

Pause

trigger

Input/Output

Paused

false

true

1.00

Output

Seconds In ¹

0 - 59

0.00 to 1.00

(0.017 increments)

Input/Output

Seconds Out ¹

0 - 59

0.00 to 1.00

(0.017 increments)

Output

Start

trigger

Input/Output

Started

false

true

1.00

Output

Stop

trigger

Input/Output

Stopped

false

true

1.00

Output

1. Frames, Hours, Minutes, and Seconds each have an "In" control pin for setting the time, and each have "Out" control pins for reading the output of the counter.

2. The increments in the position control depend on the number of frames per second.

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