Leitch FR-684AV - Chapter 6: VPD-683-CLP Programmable Video Distribution Amplifier Modules; Overview

680 Series Video Distribution Amplifiers Installation and Operation Manual 23
Chapter 6
VPD-683-CLP Programmable Video
Distribution Amplifier Modules
Overview
Figure 6-1. VPD-683-CLP Video Equalizing DA with Hard and Soft White Clip
VPD-683-CLP programmable video distribution amplifier modules are high
performance, high reliability, specialized function distribution amplifiers for
some common distribution amplifier applications. VPD-683-CLP modules
provide one differential input, eight outputs, a jumper-selectable input coupling
mode between DC and AC coupling, soft and hard clamping capability for
composite NTSC and PAL video signals, and a continuously variable
equalization for various types of coaxial cables. VPD-683-CLP modules also
features gain adjustment over a range of –3 dB to +3 dB and high frequency
response adjustment on the front-card edge of the board.
The VPD-683-CLP functions as adjustable luminance and hard white clip.
Figure 6-2 outlines its function.
A
B
C
D
E
F
H
J
K
L
M
N
P
R
S
VEA-684
VPD-683-D
VPD-683-XEQ
VPD-683-CLP
VPD-683-DEQ
-RMV
-
1
2
3
4
P3
R38
1
2
3
4
P4
R36
CLAMP MODE FOR J1
INPUT CO UPL ING SETTING FOR J 2 AND J3
AC
33
22
J2 J3
11
DC
NO CLAMP
HARD
SOFT
GAIN EQ
VEA -684-RMV
J2
J3
1
2
3
4
P3
R38
1
2
3
4
P4
R36
HARD CLIP
LUM CLIP
1
2
3
4
P1
1
2
3
4
P2