4. BEFORE YOU BEGIN MEASURING
45
4.5.4
External Sync Signal Input (LV 5770SER03A, LV 5770SER08, and LV 5770SER09A)
Figure 4-9 External sync signal input connectors
You can apply an external signal to show the video signal waveform display, vector display,
and status display (phase difference display). (*1)
Apply an external sync signal to an external sync signal input connector, and then press EXT.
The LV 7770 determines the sync signal format automatically.
As shown in the figure below, the external sync signal input connectors are loop-through.
Apply the input signal to one of the two connectors, and terminate the other connector at 75
Ω
, or connect it to another 75
Ω
device. If you connect to another device, be sure to
terminate the device at the end of the chain at 75
Ω
. Connect cables with a characteristic
impedance of 75
Ω
to the input connectors.
Figure 4-10 Loop-through
*1 The following formats can not be used in external sync mode.
•
HD dual link's1080p/60, 1080p/59.94, and 1080p/50
•
3G's 720p/30, 720p/29.97, 720p/25, 720p/24, and 720p/23.98
