JVC GY-HD251 Synchronizing with an Exter- nal Time Code Generator, Connection, Setting, Operation

e_hd250.book Page 49 Tuesday, October 24, 2006 3:11 PM

Synchronizing with an Exter- nal Time Code Generator

Synchronize the built-in time code generator with the SMPTE/EBU-compliant LTC time code, which is input from the [TC IN] terminal. After synchronization (slave lock), the built-in time code generator continues to run even if external time code are not input.

	PBPR/TC switch
	GENLOCK/AUX IN switch
	Synchronization signal
Synchronization signal	GENLOCK	CH1- VIDEO
	IN
generator	TC IN	OUT
		- AUDIO
Synchronization signal		CH2
		IEEE 1394

LTC time code External time code

generator

Connection

„Input external synchronization signal to the external time code generator and the GENLOCK/AUX IN terminal of this device.

Use BB signals or Tri-sync HD signals as the external syn- chronization signals.

CAUTION

When the power switch is turned on while the external syn- chronization signal is input, a vertical vibration occurs for a few seconds. This is not a malfunction.

„Input SMPTE/EBU-compliant LTC time code signal to the PB/TC IN terminal.

Setting

„Set the [GENLOCK/AUX IN] switch to GENLOCK.

„Set the [PBPR/TC] switch to TC.

„Set TCG SOURCE in the TC/UB/CLOCK menu screen to

EXTERNAL.

„Set the LCD screen or viewfinder to STATUS 1 screen dis- play.

Or set the LCD screen to enlarged status display screen. X See page 29.

Operation

1.Set the external time code generator and operate it.

•The built-in time code generator synchronizes with the input external time code data.

“L” lights up in the STATUS 1 screen of LCD screen or viewfinder. ”L” also lights up when the LCD screen is in enlarged character display.

STATUS 1 screen Enlarged display screen

Lights up Lights up

• “L” blinks when the time code cannot be synchronized.

2.The built-in time code generator continues to run even if the external time code generator is disconnected after synchronization.

CAUTION

•If a time code generator is connected or disconnected during recording, servo lock will be disturbed.

•The user's bit data range for an input external time code generator is 00 00 00 00 to FF FF FF FF.

When FF FF FF FF is entered, FF FF FF FF is recorded.

„When connecting multiple devices and assigning one as the master unit and others as slave units

If there is only one slave unit, connect as shown below.

If there are multiple slave units, input external synchroniza- tion signals to all GENLOCK/AUX IN terminals from the syn- chronization signal generator.

Master unit	Slave unit
VIDEO	VIDEO
CH2 - AUDIO OUT - CH1	CH2 - AUDIO OUT - CH1
IEEE 1394	IEEE 1394

VIDEO OUT GENLOCK IN

TC IN

TC OUT

49