Hitachi BE-IR20 manual External sync BE-IR21

10.External sync (BE-IR21)

Supply sync signals (HD and VD) for BE-IR21 operation. Refer to connection on page 9.

zHorizontal and vertical drive signal inputs

HD	EIA: f(H) = 15.734 kHz ±1 %
VD	EIA: f(V) = 59.94 Hz (f(V) = f(H) ÷ 262.5)

zInput level

HD	4 to 6 Vp-p negative
VD	4 to 6 Vp-p negative

z Input impedance 1 kΩ

zDrive signal input waveform

zHorizontal drive signal (HD)

T=1/f(H)

4～6Vp-p

Approx. 6.7∝ s

zVertical drive signal (VD)

T=1/f(V)

4～6Vp-p

Approx. 0.6ms

zHD and VD phase relationship

VD

Set HD and VD fallings edges to the same phase (0 ± 5 ∝ s)

HD

BE-IR20 / 21 10