IRT Electronics DVA-3007 User manual

3007-dva.ib.doc Page 1 of 9 26/02/2003
IRT Eurocard Type
DVA-3007
270 Mb/s ASI/SDI 8 O/P
Reclocking Distribution Amplifier
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: [phone] Fax: [phone]
International: [phone] [phone]
Email: [e-mail]
Web: www.irtelectronics.com
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 2 of 9 26/02/2003
DVA-3007
270 Mb/s ASI/SDI 8 O/P
Reclocking Distribution Amplifier
Instruction Manual
Table of Contents
Section Page
Operational safety 2
Description 3
Specifications 4
Technical Description 5
Installation 5
Front & rear panel connector diagrams 7
Maintenance & storage 8
Warranty and service 8
Equipment return 8
Drawing index 9
This instruction manual applies to DVA-3007 later than S/N 0304001
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.
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 3 of 9 26/02/2003
Description
The DVA-3007 270 Mb/s serial digital video distribution amplifier provides the user with a single standard
module to cover a wide range of distribution and monitoring functions for SDI or ASI signals.
Due to the fact that standard loop through techniques used in the analogue domain are unsuitable to the digital
domain most digital equipment comes with no facility to route the input signal to other locations.
As a result a VDA is required at almost every point in the digital chain.
Serial digital signals also suffer severe deterioration over relatively short cable distances. The DVA-3007 provides
a means of extending the working distances that can be achieved by equalising, reclocking and re-transmitting the
data mid route.
Where a large number of reclocked outputs are required the DVA-3007 may be used to provide reclocking and its
outputs fed to one or more DVA-3006 non reclocking DA’s to provide the number of outputs required.
This provides a more economic solution than using multiple reclocking DA’s and minimises jitter increase due to
unnecessary re-clocking.
An optional rear assembly, ZVA-3006RL (sold separately), provides a bypass relay to switch the Input (SK1) to
Output 1 (SK2) in the event of a power failure. When this bypass rear assembly is used, the number of outputs is
reduced to 6.
The DVA-3007 may be mounted in IRT’s 1 RU or 3 RU frames with other analogue or digital modules.
Features:
• For use as buffer or distribution amplifier.
• 8 x in-phase 270 Mb/s ASI or SDI reclocked outputs.
• Automatic input equalisation to 250 metres.
• Automatic output muting on no input.
• May be used in conjunction with non-reclocking DA’s to provide multiple reclocked outputs.
• Front panel indicators provide monitoring of presence of input signal at 270 Mb/s.
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
O/P 8
OUTPUTS
EQUALISER
RECLOCKING
SIGNAL FAIL
DETECTION
INPUT
Relay RL 1 = Output Alarm
LINK
ALARM O/P
RL 1
BLOCK DIAGRAM DVA-3007 SIGNAL PATH
O/P 1
MON O/P
(Optional ZDA-3006RL Bypass Rear
Assembly)
(Number of outputs reduced to 6)
RL1
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 4 of 9 26/02/2003
Technical Specifications
DVA-3007
Video input:
Number 1.
Impedance 75 Ω.
Return loss >20 dB 5 MHz to 270 MHz.
(>15 dB with optional ZVA-3006RL bypass rear assembly)
Equalisation Automatic, better than 250 metres at 270 Mb/s for Belden 8281 or equivalent cable.
(reduces to 200m when LK2 is closed).
Video outputs:
Number 8 ASI or SDI plus one front panel monitoring output.
Type Reclocked.
Level 800 mV ±10% into 75 Ω.
Impedance 75 Ω.
Return loss >20 dB 5 MHz to 270 MHz.
(>15 dB with optional ZVA-3006RL bypass rear assembly)
DC offset Nil.
Performance:
Reclocking Factory set for 270 Mb/s operation.
Rise time <1.0 ns, (700 ps typically).
Residual jitter <0.1 UI (measured with up to 300m of Belden 8281 or equivalent cable).
Connectors: BNC 75 Ohms.
Indicators:
Power LED (green) for +5 V.
Signal present LED (green) when valid ASI/SDI signal present.
Alarm:
Signal loss Contact closure. Link selectable NO/NC.
Power requirement:
Voltage 28 Vac CT (14-0-14) or ±16 Vdc
Consumption 2.5 VA (including ZVA-3006RL optional rear assembly).
Other:
Temperature range 0 - 50° C ambient.
Mechanical Suitable for mounting in IRT 19" rack chassis with input, output and power
connections on the rear panel.
Finish: Front panel Grey background, black lettering & red IRT logo.
Rear assembly Detachable silk-screened PCB with direct mount connectors to Eurocard and
external signals.
Dimensions 6 HP x 3 U x 220 mm IRT Eurocard.
Standard accessories Rear connector assembly with matching connector for alarm output.
Optional accessories ZVA-3006RL relay bypass rear assembly (6 O/P).
Due to our policy of continuing development, these specifications are subject to change without notice.
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 5 of 9 26/02/2003
Technical Description
The input circuit of the DVA-3007 consists of an 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. When link LK2 is closed equalisation is reduced to 200m for use
in noisy environments or when a short cable is used. A carrier detect and output mute circuit is used to mute the
output when no signal is present. The DVA-3007 is insensitive to the pathological patterns that can be present in
the serial digital video signal.
The DVA-3007 also features an OUTPUT MONITOR point on the front panel. The output monitor is an isolated
copy of the signal present at the rear panel outputs.
The output of the input stage is coupled to reclocking circuit, which then feeds cable driver circuits to provide the
eight isolated in phase outputs from the DVA-3007.
The input cable equaliser circuit U1 and reclocking circuit U2 incorporate carrier detection circuits to mute the
output when no signal is applied to the unit. The carrier detect signal and lock signal of U2 are used to energise
relay, RL1 via a transistor, Q1, when locked 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 a link LK1, on the
circuit board.
The dual AC inputs are rectified and then regulated by a switch mode regulator circuit to provide the +5V
operating voltage for the unit.
+5Vdc is fed to pin 32a of the rear Euro-connector via a polyfuse, JP2. The +5V is to provide power for a signal
bypass relay on the optional ZVA-3006RL bypass rear assembly, should one be used. The polyfuse protects the
+5V power rail by going high impedance should pin 32a be shorted to ground. This protects against the accidental
insertion of the DVA-3007 in anything other than its standard rear assembly or the optional ZVA-3006RL rear
assembly.
Installation
Handling:
The DVA-3007 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-3007 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.
Link LK2 closed reduces the input equalisation to 200m for use in noisy environments or when a short input cable
is used.
The presence of 270 Mb/s locked 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).
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 6 of 9 26/02/2003
It is recommended that unused outputs on the rear panel be terminated with 75-ohm termination plugs.
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 7 of 9 26/02/2003
Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show relative positions
of connectors, indicators and controls only.
Note that the ZVA-3006RL is an optional relay bypass rear assembly (sold separately), which bypasses the input
direct to output 1 in the event of a power failure. This optional rear assembly is only compatible with both the
DVA-3006 and DVA-3007 ASI distribution amplifiers and not the previous ASI/SDI distribution amplifiers,
DVA-3001 to DVA-3005.
SIGNAL
PRESENT
OUTPUT MON
DC
DVA-3007
N140
SK1 2
1
SK10 2 = Alarm
SK10 1 = Gnd
OUTPUTS
SK2
SK8
SK6
SK4
SK9
SK7
SK5
SK3
OUTPUTS
INPUT
SK10
8 O/P ASI/SDI D.A.
RL1R
2
1
SK10 2 = Alarm
SK10 1 = Gnd
SK1
SK6
SK4
SK3
SK7
SK5
SK2
OUTPUTS
INPUT
SK10
6 O/P ASI/SDI D.A
POWER OFF BYPASS SK1-SK2.
ZVA-3006RL
Optional bypass relay
rear assembly
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 8 of 9 26/02/2003
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: [phone] Fax: [phone]
Email: [e-mail]
IRT Communications
www.irtcommunications.com

3007-dva.ib.doc Page 9 of 9 26/02/2003
Drawing Index
Note: Components marked n/c on the diagrams are optional and are not included on standard production units.
They are shown to assist with interpretation of additional or optional functions, which may be included or are
necessary for factory set-up procedures.
Drawing # Sheet # Description
804516 1 DVA-3007 Circuit Schematic
804673 ZVA-3006RL Bypass Relay Rear Assembly (optional).
IRT Communications
www.irtcommunications.com

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-3007
804516
Date:
1
26-Feb-2003
SDI/ASI Reclocking
K.N.
Input
Output 8 Output 7 Output 1 Output 6 Output 2 Output 5 Output 4 Output 3Signal Detect
+5V GND Monitor O/P
Input, Reclocking and Output Circuit
804516s2.sch
AC 1 AC 4 AC 2 AC 3
AC CT
+5V GND
Power Supply Circuit
804516s3.sch
3 1
2
LK1
'DC'
'grn'
21
R40
680R
+5V
n.c.
n.o.
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B
10A 10B
5B
11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B
9A 9B
20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
P1 DIN64RA
21
LD1
HLMP-1503
1 02-04-02
PCB 804517
21 R38
10K
1 2
C36
100nF
+5V
+5V
+5V
MON. O/P
SK11
'SIGNAL'
'grn'
21
R39
680R
21
LD2
HLMP-1503
+5V
ALARM CIRCUIT
CONTACT CLOSURE (OR BREAK)
TO GROUND ON ALARM, AS SET BY LK1
32
1
Q1
BSS123
1 2
C37 4u7
1 3
D3
BAS16
Distribution Amplifier
R1R-R9R = 68R L1R-L9R = 15nH
38
RL1A
V23026 10
1
5
RL1B
+5V
2 01-08-02 ECR1368
1 2
JP2
RXE020
POLYFUSE
3 14-11-02 ECR1412
1 2
C46
10nF
12
C45
10nF
J2 optional power in
(used when fitted to FRU-1030 frame)
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B 10A 10B 5B 11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B 9A 9B 20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
J1 DIN64
OUTPUTS
1 2
L9R
1 2
L8R
1 2
L7R
1 2
L6R
1 2
L5R
1 2
L4R
1 2
L3R
1 2
L2R
1 2
L1R
INPUT
21 R9R 21 R8R 21 R5R 21 R6R 21 R7R 21 R4R 21 R3R 21 R2R 21 R1R SK1
SK2 SK3 SK4 SK5 SK6 SK7 SK8 SK9
2 1
SK10
1 2 3
J2
2 1
JP3 0R0
2 1
JP4 0R0
2 1
JP5 0R0
2 1
JP6 0R0
1 3 5 7 9
P2
1 2 3 4 5 6
P3
4 20-02-03 ECR1441
IRT Communications
www.irtcommunications.com

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. 1
ZVA-3006RL
804673
Date: 1
14-Nov-2002
SDI/ASI D.A. Rear Panel
K.N.
1 11-07-02
PCB 804674
R2R-R7R = 220R L2R-L7R = 18nH
J2 optional power in
(used when fitted to FRU-1030 frame)
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B 10A 10B 5B 11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B 9A 9B 20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
J1 DIN64
OUTPUTS
1 2
L7R
1 2
L6R
1 2
L5R
1 2
L4R
1 2
L3R
1 2
L2R
1 2
L1R 18nH
INPUT
21 R7R 21 R6R 21 R4R 21 R5R 21 R3R 21 R2R
21
R1R 56R
SK1
SK2
SK3 SK4 SK5 SK6 SK7
2 1
SK10
1 2 3J2
2 1
JP2 0R0
2 1
JP3 0R0
2 1
JP4 0R0
2 1
JP5 0R0 1
2 3 4 5 6 7 8 9 1013
14 15 16 17 18 19 20 21 22
RL1R G5Y-254P
13
2
D1R BAS16
2 1
R8R 75R
2 1
R9R 75R
2 11-11-02 ECR1415
1 2 3 4 5 6
P3
MTMM-103
1 3 5 7 9
P2
MTMM-105
IRT Communications
www.irtcommunications.com