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SERIE DENSITE
VEA-1002
VEA-1002 - Analog VDA
Guide to Installation and Operation
M454-9500-100
May 2004
Introduction
The VEA-1002 is an analog video distribution amplifier with 8
outputs, providing equalization and differential input. The
VEA-1002 will equalize up to 300m (1000’) of Belden 8281
cable. Gain and equalization can be controlled from the card
edge. A clamping circuit is provided and can be set for hard or
soft clamping. An input video signal status is also available
indicating the input signal presence. The differential input
provides rejection of hum and other artifacts on incoming
signals. The VEA-1002 is housed in a Densité frame and a
‘single’ or ‘double’ rear connector panel is required.
Video
Input
Loop
Signal
Detection
Select
Status
Gain
Microcontroller
Features
• Differential 75 O looping input with Clamping
• Eight (8) 75 O outputs
• Signal presence and 525/625 detection and reporting
• Supports NTSC and PAL video signal formats
• 50 MHz analog video bandwidth
• Equalization up to 300m (1000’)
• Status LED (with remote reporting)
• Control of gain and equalization on the card edge
• Intra frame output for monitoring
1
Equalization
Rem Control
2
3
4
Video
Outputs
5
6
7
8
To INTRA-FRAME
MONITORING
VEA-1002 Functional Block Diagram
Specifications
INPUT
Video signal:.............................Any 1 Vp-p nominal signal
Return loss: .............................> 45 dB up to 10 MHz
Coupling: .....................DC or AC with Clamping
(Hard/Soft/None)
Level: ..............................0.3 to 1.5 Vp-p
Impedance: .........................75 O ?bridging
Max. common mode signal :..... 28 Vp-p
Common mode rejection: ........> 65 dB to 10 kHz
OUTPUTS (8)
Video signal: ............................1 Vp-p nominal, adjustable
Return loss: .............................> 45 dB up to 20 MHz
Impedance: ..........................75 O
Phase match between outputs: < 0.1° @ 4.43 MHz
Output isolation signal:.............> 40 dB @ 10 MHz
Response variation:..................< 0.1 dB, 1 to 8 loads, to 20
MHz
PROCESSING PERFORMANCE
Gain range: ........................ ± 3 dB??
Freq. response: ..................<±0.05dB up to 10MHz,
............................................-??3dB @ 50MHz
EQ range:............................0-300 m Belden 8281,
............................................0-200 m Nokia 0.6/2.8
EQ response:......................<±0.05dB up to 8MHz,
............................................±??0.1dB up to 10MHz,
............................................-3 dB @ 28 MHz
Differential gain: .................< 0.15%
Differential phase: ..............< 0.15° at 8 loads,
............................................< 0.1° at 2 loads
Horizontal tilt: .....................< 0.25%, DC coupling
Vertical tilt: ..........................< 0.25%, DC coupling
Signal to noise ratio:............> 70 dB up to 15 MHz
............................................(rms noise/0.714 V, unweighted)
Chroma/luma delay error: ...< ±?1 ns
Chroma/luma gain error:.....< ±?0.02 dB
Hum: ...................................< 1 mV
Processing delay :...............15 ns
Power:.................................single 2 W
............................................Double 2.5 W
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VEA-1002
Guide to Installation and Operation
Specifications are subject to change without notice.
Menu Introduction
Most parameters are accessed and changed via an easy-to-use menu. The flow chart below outlines the entire VEA-1002 menu
path. Each menu is described throughout this section. The procedure and the operation mode are described in the common
paragraph of the DENSITÉ manual. The menu organisation is made out of a main menu and several sub-menus. A press on the
[SELECT] front panel push button of the VEA-1002accesses the menu. A lack of activity turns off the display. Default values are
written with bold characters.
STATUS
CONFIGURE ALARM NO SIGNAL ALARM LEVEL
FACTORY DEFAULT
Menu Description
{STATUS}
Displays status of the different board alarms. The higher-level
alarm is displayed, even if not configured to activate the
STATUS led.
REAR PANEL ERROR Indicates an absence of the rear panel or
an incompatibility between the module
and the rear panel. The STATUS led
turns on flashing red.
OK 525 Indicates a valid 525 lines incoming
signal
OK 625 Indicates a valid 625 lines incoming
signal
NO SIGNAL Indicates an absence of input signal
REAR PANEL ERROR, NO SIGNAL, OK 525, OK 625
GREEN, YELLOW, RED, FLASH RED
ALARM REPORT
RESTORE
NONE, GPI
{CONFIGURE ALARM}
NO SIGNAL It is possible to associate the STATUS
Led colour and/or a GPI relay activation
to each detected error. Alarm relay
activation depends of the ENABLE
selection of the controller board menu
GPI REPORT.
ALARM LEVEL Associates to each error the STATUS
led colour: GREEN, YELLOW, RED and
FLASH RED. This selection has no
influence on the {STATUS} menu
display.
ALARM REPORT The default value NONE is assigned to
errors. Alarm relay activation will be
associated to an error when GPI is set.
{FACTORY DEFAUT}
RESTORE resets the module with the factory
default parameters.
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Status and Report
VEA-1002
Guide to Installation and Operation
This table shows the STATUS led colour and the report action
according to the level of a given error condition. Notice that the
“Flashing Yellow” indicates that the SELECT button on the front
panel has been pushed, and the card is being accessed via the
communication protocol.
No signal detected on Input µ µ Card accessed via the communication protocol Yes
Rear Panel not matching - - - - - Yes -
Note: The non requested message affectation to an alarm status can only be accessed by the communication protocol (serial port)
Factory default. µ
Non requested
Messages
GPI
Report
Green Yellow Red Flashing
Red
Flashing
Yellow
Calibration
First-time calibration
To Calibrate theVEA-1002 for your system, you must first select the input cable length. Use jumper LK2.
Needed:
• Signal generator:
• Accurate measuring equipment
• Small flat head screwdriver (potentiometer adjustment).
1. 100% luma adjustment
Generate a test signal with a 100 % luma level.
2. Equalisation adjustment
Generate a 100/75 colour bars signal.
Using the measuring equipment to visualise the result, slowly
turn the "GAIN " potentiometer (P2) situated on the card edge to
adjust to obtain the correct level.
Format 100% white level
NTSC with setup 714 mV or 100 IRE
NTSC no setup 714 mV or 100 IRE
PAL 700 mV
NOTE: The output reacts slowly when the potentiometer is
turned and it is constantly fluctuating when no turning is done.
This is normal. The card is continually comparing the input signal
to the potentiometer value.
.
Using the measuring equipment to visualize the result, slowly
turn the ‘EQ’ (P3) potentiometer to adjust the peak-to-peak
level of the red bar in the 100/75 colour bars signal at the
output of the VEA-1002.
Format 75% p-p red level
NTSC with setup 626 mV or 87.7 IRE
NTSC no setup 677 mV or 94.9 IRE
PAL 664 mV
Another method is to use a vector scope and make all colour
vectors converge upon the center of their respective tight
tolerance boxes.
Use “HF ADJ” (P4) to fine tune.
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VEA-1002
Guide to Installation and Operation
Front edge presentation
P3EQ
D7
STATUS
SELECT Switch
Status Led
SW1
SELECT
Egalisation adjustment
VEA-1002
Configuration
GAIN
Trim for gain adjustment.
P4
P2
GAIN
HF
ADJ.
Gain adjustment
HF Egalisation adjustment
Board Presentation
EQ
HF ADJ
LK1
Trim for equalization adjustment.
Trim for HF equalization adjustment
3-position jumper for clamping configuration.
1-2 None , 3-4 Hard , 5-6 Soft
LK2
3-position jumper for cable length configuration
1-2: 0 – 100 m
3-4: 100 – 250 m
5-6: 250 – 300 m.
Connections
VEA-1002 is used with the
single rear panel VEA-1002SRP that includes 1 input to 4
outputs or with a double rear
panel VEA-1002-DRP that
includes 1 input with passive
loop to 8 outputs. The VEA1002-SRP-L offers 1 input
with passive loop to 3 outputs.
VEA-1002
-DRP
1
VIDEO OUT
2
3
4
VEA-1002
-SRP
VIDEO IN
5
VIDEO OUT
6
7
VEA-1002
8
VEA-1002
-SRP-L
VIDEO IN
1
VIDEO OUT
2
3
VEA-1002
4
1
VIDEO OUTVIDEO IN
2
VEA-1002
3
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