Using Genlock Functions; Dubbing With Av Devices; Genlock Menu Screen - JVC GY-HD250 Instructions Manual

USING EXTERNAL COMPONENTS
Using GENLOCK Func-
tions
This device features a GENLOCK IN terminal. Input external
synchronization signals in the GENLOCK IN terminal to syn-
chronize camera images or playback images with external
signals.
Additionally, the H (horizontal) and SC (subcarrier) phase
adjustments can be performed on image signals of this
device for external synchronization signals from the GEN-
LOCK menu screen.
GENLOCK functions are only valid in Camera mode. They do not
work in VTR mode.
GENLOCK/AUX IN switch
GENLOCK/AUX IN terminal
Connection
During Standby or Stop mode, input synchronization sig-
nals from a Sync signal generator to the GENLOCK/AUX
IN terminal.
The following synchronization signals are applicable.
SD synchronization signal: BB (Black burst) signals
SMPTE170M (RS-170A)-compliant for NTSC
ITU-R BT.470-6-compliant for PAL
HD synchronization signal: HDTV Tri-sync signals
SMPTE296M-compliant for HD720p
SMPTE274M-compliant for HD1080i
CAUTION
• When the FRAME RATE is set to 60/30 or 24 in the
VIDEO FORMAT[1/2] menu screen, input a 59.94 Hz
synchronization signal (vertical synchronization). 50 Hz/
60 Hz synchronization signals cannot be synchronized.
If the FRAME RATE is set to 50/25, input a 50 Hz syn-
chronization signal. 59.94 Hz/60 Hz synchronization sig-
nals cannot be synchronized.
• Do not connect or disconnect the cable during recording
or playback.
• When the power is turned on while the external synchro-
nization signal is input, a vertical vibration occurs for a
few seconds. This is not a malfunction.
• VTR playback signals with jitter cannot be synchronized
with this device.
Setting
Set this device to Camera mode.
Set the GENLOCK/AUX IN switch to GENLOCK.
• When the camera image is locking to external synchro-
nization signals, "SYNC LOCKING" is displayed on the
screen. When locking to external synchronization sig-
nals is complete, the indication disappears and you can
enter recording mode.
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Synchronized Signals
The synchronized signal differs depending on the input sync
signal.
Refer the table below.
Input sync signal
Terminal Video signal Tri-sync
BB
720p 1080i
VIDEO Composite SC,H,V,F V V,F
SD Component H,V,F V V,F
HD Component 720p V H,V V
Y/P /P HD Component 1080i V,F V H,V,F
B R
SD RGB H,V,F V V,F
SD Y/C SC,H,V,F V V,F
SD-SDI H,V,F V V,F
HD/SD-
HD-SDI 720p V H,V V
SDI
HD-SDI 1080i V,F V H,V,F
SC : Subcarrier phase H: Horizontal phase
V : Vertical phase F : Field phase
Adjust SC PHASE and H PHASE in the above table from the

GENLOCK menu screen.

Adjust SC and H PHASE
1.
Display the GENLOCK menu screen.
Follow the steps in "Setting Menu Screens" on page 75
and proceed as follows.
MENUrOTHERSrGENLOCK
2.
In the GENLOCK menu screen, select the item to per-
form phase adjustment for and adjust.
SD H PHASE : Adjust the H phase in SD analog signals.
(During BB signal input)
HD H PHASE : Adjust the H phase in HD analog and SD/
HD SDI signals. (During Tri-sync signal
input, PHASE of SD analog signals are
simultaneously adjusted in HD H PHASE
item.)
SC PHASE : Adjust the SC phase in composite and
YC signals.
For details, refer to "GENLOCK Menu Screen" on
X See page 99.
MEMO
• H PHASE cannot be adjusted during playback or record-
ing.
• IEEE1394 output stops while H PHASE is being
adjusted.
• When values for SD H PHASE or HD H PHASE is
changed, the images cannot be produced properly
momentarily. This is not a malfunction.

Dubbing with AV Devices

By connecting the video signal output terminal and the
AUDIO OUTPUT terminal on GY-HD250/GY-HD251 to an AV
device, analog signal dubbing is possible.
1.
Connect the cables.
To reduce the emission of unwanted radio waves, be
sure to attach the provided clamp filter as shown in the
figure below.
• Attach the clamp filter as close to this device as possi-
ble, as shown in the figure.
Composite cable
or
Component cable
Signal flow
Recording unit
AUDIO
OUTPUT
connector
Signal flow
Audio cable
Clamp filter
2.
Turn both devices on.
3.
Set this device to VTR mode.
Press the CAM/VTR button. The VTR indicator lights.
4.
Set the video output.
Set the VIDEO FORMAT menu screen. X See page 77.
VIDEO FORMAT menu screen
• HDV PB OUTPUT item:
Set the video format to be output from the video output
terminal during tape playback.
• PB TAPE item:
Select whether to automatically detect the playback tape
video format or play back only a particular format.
Normally, use the "AUTO" setting.
• OUTPUT TERM. [DV] item:
Set component, RGB or Y/C signals for the output image
signals of the [Y/P /P ] terminal. (Only for DV format)
B R
5.
Set the audio output. X See page 63.
Set the AUDIO menu screen. X See page 87.
AUDIO menu screen
• PB AUDIO CH [DV] item:
Set the audio channel to be output.
6.
Insert the videocassettes.
GY-HD250/GY-HD251 : Insert the recorded videocas-
sette.
Recording unit : Insert the videocassette to be
dubbed to.
7.
Press the PLAY/STILL button on the GY-HD250/GY-
HD251 to start playback.
8.
Start recording on the recording unit.
For details, see the instructions to the unit used for
recording.
9.
When dubbing is completed.
Stop recording on the recording unit, and then press the
STOP button on the GY-HD250/GY-HD251 to stop play-
back.
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