Time code/user bit

Time code

The time code is used when the time code signal generated by the time code generator (time code signal generator) is to be recorded on the tape, its values are to be read by the time code reader (time code signal reader), and the absolute position of the tape is to be displayed in increments of hours, minutes, seconds and frames.

The time code is written in the sub-code area (data area) of the helical track. The VTR’s playback speed can be read from the stop mode to slow-motion playback up to high-speed play (approx. 50 a normal speed approx. 100 a when using DVCPRO tape).

The time code values are indicated using the display and superimpose functions.

TCR

00 :

07

: 04 :

24

 

↑

↑

↑

↑

 

Hours

Minutes

Seconds

Frames

User bit

“User bit” refers to the 32-bit (8-digit) data frame among the time code signals which has been released to users. It enables operator numbers values to be recorded.

The alphanumeric characters which can be used for the user bit are the figures 0 to 9 and the letters A to F.

Setting the internal time code

(1)Set the VTR to stop mode.

(2)Select “TC” using the COUNTER button.

(3)Set the run mode for the time code generator using setup menu No. 513 (RUN MODE).

REC:

The internal time code generator is advanced during recording.

FREE:

When the power is on, the internal time code generator is advanced regardless of the operation mode.

(4)Set the TCG switch to REGEN mode.

REGEN:

In this mode, the continuity of the original time code is maintained.

A more detailed setting can be performed using setup menu No. 503 (TCG REGEN).

PRESET:

In this mode, recording is commenced from the value which was set by the TC PRESET button.

(5)To preset the time code or user bit, take the following steps.

Set the TCG switch to “PRESET.”

Select “TC” or “UB” using the COUNTER button.

When the TC PRESET button is pressed, operation is transferred to the setting mode, and the setting digits start flashing on the counter display.

Operate the joystick, and set the preset value.

Left, right → for moving between digits; up, down

→for changing the setting

•When the RESET button is pressed, the preset value is reset to zero.

The preset value is set by pressing the TC PRESET button.

Setting the external time code

(1)Set the VTR to stop mode.

(2)Select “TC” using the COUNTER button.

(3)Set the TCG switch to EXT. (External time code selection)

(4)The following settings can be selected with setup menu No. 505 (EXT TC SEL).

(only when AJ-YA93P is installed).

LTC:

The LTC signal input to the TIME CODE IN connector (BNC) on the rear panel is recorded as time code.

Note:

The LTC must be synchronized with the video signal.

The AJ-YA93P analog I/O board option is required.

VITC:

The VITC of the input video signal or time code on IEEE 1394 is recorded.

Reproducing the time code/user bit

(1)Set the VTR to stop mode.

(2)Select “TC” or “UB” using the COUNTER button.

(3)Press the PLAY button.

Playback starts and the time code is shown on the display.

When the SUPER switch is set to ON, the time code value is superimposed on the video signals from the VIDEO MON connector.

Note:

When the time code signal cannot be read, the time code is automatically interpolated by the CTL signal. The display appears as shown below.

 

T R

00:01:04:07

 

 

 

 

 

 

 

 

 

 

 

: 1, 3 field

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the time code

 

 

 

 

 

 

 

 

: 2, 4 field

signal cannot be read,

 

 

 

 

 

 

 

 

 

an asterix (

) is

 

The colon between the seconds

 

displayed.

 

 

and frames changes to a period

 

 

 

 

 

during drop frame mode.

 

 

 

 

 

(For AJ-SD93P)

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