3002 DVA_ib DVA Ib
User Manual: 3002-DVA_ib
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3002-dva.ib.doc Page 1 of 8 16/07/2002
IRT Eurocard Types
DVA-3002
Serial Digital VDA
Designed and manufactured in Australia
IRT can be found on the Internet at:
http://www.irtelectronics.com
I R T Electronics Pty Ltd A.B.N. 35 000 832 575
26 Hotham Parade, ARTARMON N.S.W. 2064 AUSTRALIA
National: Phone: (02) 9439 3744 Fax: (02) 9439 7439
International: +61 2 9439 3744 +61 2 9439 7439
Email: sales@irtelectronics.com
Web: www.irtelectronics.com
3002-dva.ib.doc Page 2 of 8 16/07/2002
DVA-3002
Serial Digital VDA
Instruction Manual
Table of Contents
Section Page
Operational Safety 2
General Description 3
Applications 3
Specifications 4
Circuit description 5
Installation 5
Front and rear layouts 6
Maintenance & Storage 7
Warranty and service 7
Equipment return 7
Drawing list index 8
This instruction manual applies to DVA-3002 assembly 804048 units later than S/N 9710001
Operational Safety:
WARNING
Operation of electronic equipment involves the use of voltages and currents that may
be dangerous to human life. Note that under certain conditions dangerous potentials
may exist in some circuits when power controls are in the OFF position.
Maintenance personnel should observe all safety regulations.
Do not make any adjustments inside equipment with power ON unless proper
precautions are observed. All internal adjustments should only be made by suitably
qualified personnel. All operational adjustments are available externally without the
need for removing covers or use of extender cards.
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General Description
The IRT DVA-3002 is a one in eight out distribution amplifier for SMPTE/EBU serial digital video signals.
The DVA-3002 features an input circuit with automatic cable equalisation for Belden 8281 or PFS1/2 coaxial cable
and cable driver circuits for nine individually sourced outputs, eight outputs are provided on the rear connector panel
and the ninth output is a monitoring output on the front panel of the unit.
The input cable equaliser circuit incorporates a carrier detection circuit to mute the output when no signal is applied
to the unit. The DVA-3002 uses the carrier detect signal to energise a relay when carrier is present, the relay contacts
are connected to SK10 on the rear panel to give a failure alarm in the form of a make (or break) to ground on failure
as set by LK1 on the circuit board.
The DVA-3002 is built in a 3U extended Eurocard 220 mm x 100 mm modules designed to mount in the IRT FR-
700, FR-722A, FR-748 and FRU-1030 family of Eurocard frames.
Applications
The DVA-3002 is intended to be used where multiple signal outputs are required from equipment with only one
output and to provide input cable equalisation for devices not having this feature as most unequalised inputs will
only support input signal cable lengths of less than 20 metres.
Frequent reclocking of a serial digital signal can lead to increased jitter and unnecessary increased cost, complexity
and transit time in circuits. The DVA-3002 is therefore the unit of choice where reclocking of the signal is provided
by the destination equipment or otherwise where reclocking is not deemed necessary.
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Technical specifications
DVA-3002
Input:
Number 1.
Impedance 75 Ohm.
Return loss >15 dB 5 MHz to 360 MHz.
Outputs:
Number 9.
Signal level 800 mV ± 10%
Impedance 75 Ohm.
Return loss >15 dB 5 MHz to 360 MHz.
DC offset Nil.
Performance:
Cable compensation Automatic, better than 300 metres at 270 Mb/s
for Belden 8281 or PSF1/2 cable.
Output rise time <1 ns, (700 ps typically).
Connectors: BNC.
Indicators:
Power LED (green) for +5v.
Signal present LED (green) for signal present.
Signal fail (relay contacts) Rear panel SK10 (pins 1 and 2)
Power requirement:
Voltage 28 Vac CT (14-0-14 Vac) or ±16 Vdc.
Consumption 2.5 VA (<90 mA).
General:
Temperature range 0 - 50° C ambient
Mechanical Suitable for mounting in IRT 19" rack chassis
types FR-700 & FR-722 with input, output and
power connections to the rear.
Size 6 HP x 3U Extended Eurocard (220 mm x 100 mm).
Weight With rear assembly 330g.
Finish:
Front panel Grey enamel, silk screened black lettering
& red IRT logo.
Rear assembly Detachable silk screened PCB with direct mount
connectors to Eurocard and external signals.
Standard accessories: Rear connector assembly (supplied with module).
3002-dva.ib.doc Page 5 of 8 16/07/2002
Circuit Description
The input circuit of the DVA-3002 consists of U1 a CLC014 adaptive cable equaliser IC, which automatically adapts
to equalise any cable length from zero metres to lengths that attenuate the signal by 40 dB at 200 MHz. This
corresponds to 300 metres of Belden 8281 cable. A carrier detect and output mute circuit in the CLC014 is used to
mute the output when no signal is present. The CLC014 is insensitive to the pathological patterns that can be present
in the serial digital video signal.
The DVA-3002 also features an OUTPUT MONITOR point on the front panel. The output monitor is a isolated
copy of the signal present at the rear panel outputs.
The output of the CLC014 input stage is coupled to U2, U3 and U5 CLC007 cable driver circuits to provide the nine
isolated outputs from the DVA-3002.
Note the cable driver outputs are complementary signals thus signal inversion can occur between the input and three
of the outputs of the DVA-3002.
The input cable equaliser circuit U1 incorporates a carrier detection circuit to mute the output when no signal is
applied to the unit. The carrier detect signal energises relay RL1 via inverter Q1 when carrier is present, the relay
contacts are connected to SK10 on the rear panel to give a failure alarm in the form of a make (or break) to ground
on failure as set by LK1 on the circuit board.
The dual AC inputs are rectified by D1 to D4, and then regulated in a LM2575-5 switch mode regulator circuit U4 to
provide the +5V operating voltage for the unit.
Installation
Handling:
The DVA-3002 contains static sensitive devices and proper static free handling precautions should be observed.
When individual modules are stored, they should be placed in antistatic bags and proper antistatic procedures should
be followed when inserting and removing cards from these bags.
Power:
Ensure that the voltage selection of the IRT mounting frame used to house the DVA-3002 and the local AC mains
supply voltage match and that the correct rating fuse is installed in the mounting frame power supply.
Earthing:
Chassis earth connection of the equipment mounting frame is via the earth connection on the three pin (IEC) AC
mains supply inlet. This is a safety earth and must be connected.
Installation in frame or chassis:
See details in separate manual for selected frame type.
LK1 is factory set for a contact make to ground on signal failure at SK10 pin 2 on the rear panel, move LK1 from
the normally closed (N/C) to the normally open (N/O) position for a break to ground on signal or power loss.
The presence of signal is indicated by the ‘SIGNAL PRESENT’ front panel LED (green).
The presence of the internal +5 Vdc supply is indicated by the front panel LED (green).
It is recommended that unused outputs on the rear panel be terminated with 75 ohm termination plugs.
3002-dva.ib.doc Page 6 of 8 16/07/2002
Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show connection order and
approximate layout only.
SIGNAL
PRESENT
OUTPUT MON
DC
DVA-3002
N140
3002
INPUT
2
1
1 = GND
2 = ALARM
OUTPUTS
2
4
6
8
1
3
5
7
3002-dva.ib.doc Page 7 of 8 16/07/2002
Maintenance & storage
Maintenance:
No regular maintenance is required.
Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind.
This is especially important in fibre optic equipment where cleanliness of optical connections is critical to
performance.
Storage:
If the equipment is not to be used for an extended period, it is recommended the whole unit be placed in a sealed
plastic bag to prevent dust contamination. In areas of high humidity a suitably sized bag of silica gel should be
included to deter corrosion.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
Warranty & service
Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary
conditions apply under a particular contract of supply. For situations when “No Fault Found” for repairs, a
minimum charge of $A100.00 will apply, whether the equipment is within the warranty period or not.
Equipment warranty is limited to faults attributable to defects in original design or manufacture. Warranty on
components shall be extended by IRT only to the extent obtainable from the component supplier.
Equipment return:
Before arranging service ensure that the fault is in the unit to be serviced and not in associated equipment. If
possible, confirm this by substitution.
Before returning equipment contact should be made with IRT or your local agent to determine whether the
equipment can be serviced in the field or should be returned for repair.
The equipment should be properly packed for return observing antistatic procedures.
The following information should accompany the unit to be returned:
1. A fault report should be included indicating the nature of the fault
2. The operating conditions under which the fault initially occurred.
3. Any additional information which may be of assistance in fault location and remedy.
4. A contact name and telephone and fax numbers.
5. Details of payment method for items not covered by warranty.
6. Full return address.
7. For situations when “No Fault Found” for repairs, a minimum charge of $A100.00 will apply, whether
the equipment is within the warranty period or not.
Please note that all freight charges are the responsibility of the customer.
The equipment should be returned to the agent who originally supplied the equipment or, where this is not
possible, to IRT direct as follows.
Equipment Service
IRT Electronics Pty Ltd
26 Hotham Parade
ARTARMON
N.S.W. 2064
AUSTRALIA
Phone: 61 2 9439 3744 Fax: 61 2 9439 7439
Email: service@irtelectronics.com
3002-dva.ib.doc Page 8 of 8 16/07/2002
Drawing List Index
Drawing # Sheet # Description
804048 1 DVA-3002 serial digital VDA schematic diagram.
Title
SCALE
SIZE
Sheet
DRAWN
CHECKED
ENG. APP.
Revision:
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of1
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
A3
N.T.S. 3
DVA-3002
804048
Date:
2
23-Mar-2001
2 30-06-97
SERIAL DIGITAL VIDEO
K.N.
1 29-01-97
DISTRIBUTION AMPLIFIER
28a,b
29a,b
EYE
MON
1a,b
2a,b
3a,b
4a,b
5a,b
6a,b
8a,b
7a,b
9a,b
10a,b
11a,b
12a,b
19a,b
18a,b
17a,b
16a,b
15a,b
14a,b
21a,b
22a,b
23a,b
24a,b
25a,b
26a,b
13a,b
20a,b
27a,b
30a,b
31a,b
+5
+5
+5V
+5
+5
+5
(SIGNAL
PRESENT)
(DC IND.)
32b
n.o.
n.c.
+5
+5
+5
MON. O/P
INPUT (J1/P1)
(P1/J1) OUTPUTS
J2/RA optional power in
[used when fitted to FR-722A or FRU-1030 frame]
ALARM CIRCUIT
CONTACT CLOSURE (OR BREAK)
TO GROUND ON ALARM, AS SET BY LK1
PCB 804049R
TP1
2 1
D4
1N4004
C16
4u7
C17
4u7
C18
4u7
C19
4u7
2 1
D1
1N4004
2 1
D2
1N4004
I
1F4
O2
EN
5
G
3
U4
LM2575-5.0
L2
22uH
F1
4R7
F2
4R7
F3
4R7
F4
4R7
JP1
0R0
JP2
0R0
JP3
0R0
R2
100
R5
51
R8
75 R10
75
2 1
D3
1N4004
R11
100 R12
100
R15 68
R16 68
R17 68
R18 68
C11
10uF
Q0 1
VCC
8
Q1 4
Q1 3
Q0 2
VEE
5
IN-
6
IN+
7
U2
CLC007AJE
Vcc
1DO 14
AEC-
7
AEC+
6
CD
5
Vcc
4
OEM
3
Vcc
2
DI 8
DI 9
Vee 10
Vee 11
MUTE 12
DO 13
U1
CLC014AJE
L1
330uH
C20
4u7 R19 68
R20 68
R21 68
R22 68
R23
820
C21
4u7
C22
4u7
C23
4u7
C7
100n
C9
100pF
C26
1000uF C27
100uF C28
220uF C29
220uF
21
LD2
LDGRN
R6
22K
21
LD1
LDGRN
R14
100
R13
100
C2
100n
L3
C1
100n
R3
120
R1
75
C8 100n
C6 100pF
C5
10nF C12
10nF
C14
10nF C15
100pF
C13
100pF
C10
10nF
R7
10K
C3
100n
C4
10uF
R24
820
2 1
D7
BAS32
3 1
2
LK1
1
32
Q1
BC846
1 3
2
FL2
DSS306
1 3
2
FL1
DSS306
1 3
2
FL3
DSS306
1 3
2
FL4
DSS306
Q0
1VCC 8
Q1
4
Q1
3
Q0
2
VEE 5
IN- 6
IN+ 7
U5
CLC007AJE
C34
100n
R27
68R
R28
150
C32
4u7
SK1
C31
10nF L5
470nH
C30
10nF C33 4u7
C24
10nF
2 1
D6
BAS32
R25
100 R26
100
SK9
1
2
3
J2
SK6
3
2
1
SK10
SK11
TP2
+5V
L4
470nH
Q0 1
VCC
8
Q1 4
Q1 3
Q0 2
VEE
5
IN-
6
IN+
7
U3
CLC007AJE
C25
10nF
L2/RA
L3/RA
L4/RA
L6/RA
L5/RA
L7/RA
L8/RA
L9/RA
L1/RA
SK8
SK5
SK7
SK4
SK3
SK2
2 1
D5
1N5822
C35
4u7
38
RL1
10
1
5
RL1
V23026
