Transcript
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:
[email protected] Web: www.irtelectronics.com
IRT Eurocard Type DDA-3010 140/155 Mb/s G.703 6 O/P Reclocking Distribution Amplifier
Designed and manufactured in Australia IRT can be found on the Internet at:
http://www.irtelectronics.com
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DDA-3010 140/155 Mb/s G.703 6 O/P Reclocking Distribution Amplifier Instruction Manual
Table of Contents Section
Page
Operational safety Description Specifications Electrical characteristics of signal Technical Description Installation Front & rear panel connector diagrams Maintenance & storage Warranty and service Equipment return Drawing index
2 3 4 5 6 7 8 9 9 9 10
This instruction manual applies to DDA-3010 later than S/N 0401001
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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Description BLOCK DIAGRAM DDA-3010 SIGNAL PATH OUTPUTS O/P 1
Power Loss Bypass Relay
O/P 2 O/P 3 RECLOCKING
INPUT
EQUALISER
O/P 4
SIGNAL FAIL DETECTION
O/P 5
Link LK4 140/155 Mb/s Select
O/P 6 MON O/P Link LK1 RL 1 SIGNAL FAIL ALARM O/P
RL1
Relay RL 1 = Signal Fail Alarm (Loss of Lock, Loss of Signal) Relay RL 2 = Power Loss Alarm
Link LK2 RL 2
POWER LOSS ALARM O/P
The IRT DDA-3010 is a single input, six out 140/155 Mb/s data distribution amplifier whose input and outputs comply with ITU Rec. G.703. 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 DDA is required at almost every point in the digital chain. Serial digital signals also suffer severe deterioration over relatively short cable distances. The DDA-3010 provides a means of extending the working distances that can be achieved by equalising, reclocking and re-transmitting the data mid route. The DDA-3010 provides input cable equalisation and reclocking of the serial digital signal, muting of the output signal when no input signal is applied and external alarm contacts on loss of signal or loss of lock and loss of the power supply. Six individually sourced outputs are provided at the rear of the module and a monitoring port is provided on the front panel. In the event of a power failure, a bypass relay automatically switches the input signal to output 1. Indicators are provided on the front panel for:
Signal present. 155 Mb/s operation. 140 Mb/s operation. Power on.
The DDA-3010 may be mounted in IRT’s 1 RU or 3 RU frames with other analogue or digital modules.
Standard features:
• • • • • • •
Input and output connections on the rear panel. Automatic input equalisation to 250 metres. Data regeneration & re-clocking. Automatic output muting on no input. External alarms. Front panel indicators provide monitoring of presence of input signal. Front panel indication of link selection of operating rate 140 Mb/s or 155 Mb/s.
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Technical Specifications DDA-3010 140/155 Mbits/s data (link selectable): Input: Type Impedance Electrical characteristics
AC coupled. 75 Ω terminated. to ITU-T Rec. G.703 interface at 139,264 kbit/s or 155.520 kbit/s, link selectable, (see below).
Outputs: Type Number Impedance Electrical characteristics
AC coupled. 6 regenerated data located on rear connection assembly. 75 Ω source terminated. to ITU-T Rec. G.703 interface at 139,264 kbit/s or 155.520 kbit/s, link selectable, (see below).
Performance: Cable Equalisation Jitter Tolerance
Automatic, better than 250 metres for Belden 8281 or equivalent cable. As per ITU-T Rec. G.823 Table 2.
Connectors: Data:
BNC 75 Ω. Krone LSA plus.
Alarm:
Indicators: Power Signal present 155 Mb/s operation 140 Mb/s
LED (green) for +5V. LED (green). LED (green). LED (yellow).
Alarm signal: Power Loss Alarm Signal Failure Alarm
Power Requirements: Voltage Power consumption
N/O or N/C, link selectable, relay contact closure to ground on power failure. N/O or N/C, link selectable, relay contact closure to ground on loss of input signal or loss of signal lock.
28 Vac CT (14-0-14) or ± 16 Vdc. 3 VA (< 107 mA).
Other: Temperature range Mechanical
Dimensions
0 - 50° C ambient Suitable for mounting in IRT 19" rack chassis with input, output and power connections on the rear panel. Grey background, black lettering & red IRT logo. Detachable silk-screened PCB with direct mount connectors to Eurocard and external signals. 6 HP x 3 U x 220 mm IRT Eurocard
Standard accessories Optional accessory
DDA-3010 rear connector assembly (supplied with module). Instruction manual.
Finish:
Front panel Rear assembly
Due to our policy of continuing development, these specifications are subject to change without notice.
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Electrical characteristics of signal: CMI coded binary signal - to ITU-T Rec G.703 Test load impedance
75 Ohms resistive.
Nominal peak to peak
1.0 ±0.1 V.
Rise time between 10% and 90% amplitudes of the measured steady state amplitude
< 2 ns.
Transition timing tolerance (referred to the mean value of the 50% amplitude points of negative transitions)
Negative transitions: ± 0.1 ns. Positive transitions at unit interval boundaries: ± 0.5 ns. Positive transitions at mid-intervals: ± 0.35 ns.
Input return loss
> 15 dB over the frequency range 7 MHz to 210 MHz.
Output return loss
> 15 dB over the frequency range 7 MHz to 210 MHz.
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Technical Description The input circuit of the DDA-3010 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. A carrier detect and output mute circuit is used to mute the output when no signal is present. The DDA-3010 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 a reclocking circuit, which then feeds cable driver circuits to provide the six isolated in phase outputs from the DDA-3010. The input cable equaliser and reclocking circuits incorporate carrier detection circuits to mute the output when no signal is applied to the unit. The carrier detect signal and lock signal of the reclocker are used to energise relay, RL1 via a transistor, Q1, when locked carrier is present. A second relay, RL2, de-energises on loss of power to give a separate alarm for loss of power. 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 links LK1 and LK2, respectively, 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, F5. The +5V is to provide power for a signal bypass relay rear assembly. 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 DDA-3010 in anything other than its standard rear assembly.
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Installation Handling: The DDA-3010 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 DDA-3010 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. Links 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 loss of signal loss or loss of lock. Links LK2 is factory set for a contact make to ground on signal failure at SK10 pin 3 on the rear panel, move LK2 from the normally closed (N/C) to the normally open (N/O) position for a break to ground on loss of power. Link LK4 in the OUT position sets the card for 140 Mb/s operation and is indicated by the ‘140’ front panel LED (yellow). Link LK4 in the IN position sets the card for 155 Mb/s operation and is indicated by the ‘155’ front panel LED (green). The presence of either a 140 Mb/s or 155 Mb/s locked signal is indicated by the ‘SIGNAL’ 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.
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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.
ZVA-3010RL
DD A- 3 0 1 0
POWER OFF BYPASS SK1 SK2
OUTPUTS SK7
SIGNAL SK6
155 140
SK5 SK4 SK2 SK3
OUTPUT MON SK1 INPUT SK10
DC RL1R
3 2 1
SK10 3 = Power Fail SK10 2 = Alarm SK10 1 = GND N140
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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 1 hour’s labour, at IRT’s current labour charge rate, 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. 2. 3. 4. 5. 6. 7.
A fault report should be included indicating the nature of the fault The operating conditions under which the fault initially occurred. Any additional information, which may be of assistance in fault location and remedy. A contact name and telephone and fax numbers. Details of payment method for items not covered by warranty. Full return address. For situations when “No Fault Found” for repairs, a minimum charge of 1 hour’s labour will apply, whether the equipment is within the warranty period or not. Contact IRT for current hourly rate.
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: Email:
3010-dda.ib.rev1.doc
61 2 9439 3744
[email protected]
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Fax:
61 2 9439 7439
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Drawing Index Drawing #
Sheet #
Description
804823
1
DDA-3010 Circuit Schematic
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LD4 HLMP-1503 'grn'
R59 680R
+5V
LD1 HLMP-1503 'grn'
R56 680R
+5V
1
1
1
'155 Mb/s' LD3 HLMP-1503 'grn'
R58 680R
+5V
0R0
N/C L3
Q2 BSS123
2
R55
'140 Mb/s' LD2 HLMP-1401 'yell'
PCB 804824
'SIGNAL'
'DC'
1
R57 680R
+5V
2
2
21
31
2
2
21
1
21
1
2
2
C35 100nF
R54 10K
1
Q1 BSS123
RL1A V23026
RL2A V23026
Output 1
Output 2
Output 3
Output 4
Output 5
+5V
+5V
2
D3 BAS16
2
D4 BAS16
804823s4.sch
5
+5V
5
+5V
10
1
1
10
1
2
n.o.
n.c.
LK1
RXE020 POLYFUSE
F5
n.o.
n.c.
LK2
2
2
C43 10nF
C42 10nF
C41 10nF
ALARM CIRCUITS CONTACT CLOSURE (OR BREAK) TO GROUND ON ALARM, AS SET BY LK1,LK2
RL1B
C36 1uF
RL2B
AC 4
AC 3
AC 2
AC 1
Power Supply circuit
804823s2.sch
Input
CD
RATE
SD
SD
Input Equaliser and Reclocking circuit
804823s3.sch
SD
SD
MON
3
Output 6
1 2
J2 BNC
3
8
3
3 8
2
1
2
3
1
3
1
2 1
1 3 1
1
22
1
2 1
1
2
2
1
1A 1B 2A 2B 3A 3B 4A 4B 5A 5B 6A 6B 7A 7B 8A 8B 9A 9B 10A 10B 11A 11B 12A 12B 13A 13B 14A 14B 15A 15B 16A 16B 17A 17B 18A 18B 19A 19B 20A 20B 21A 21B 22A 22B 23A 23B 24A 24B 25A 25B 26A 26B 27A 27B 28A 28B 29A 29B 30A 30B 31A 31B 32A 32B
DIN64RA
P1
DIN64
J1
1A 1B 2A 2B 3A 3B 4A 4B 5A 5B 6A 6B 7A 7B 8A 8B 9A 9B 10A 10B 11A 11B 12A 12B 13A 13B 14A 14B 15A 15B 16A 16B 17A 17B 18A 18B 19A 19B 20A 20B 21A 21B 22A 22B 23A 23B 24A 24B 25A 25B 26A 26B 27A 27B 28A 28B 29A 29B 30A 30B 31A 31B 32A 32B 1
1
1
1
1
1
1
1
1
1
1
1
R2R
L2R
R3R
L3R
R4R
L4R
R5R
L5R
R6R
L6R
R7R
L7R
3 2 1
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1 2 3
9
7
5
3
1
J2
Not Fitted
P2
SK10
13 14 15 16 17 18 19 20 21 22
D1R
3
1
10 9 8 7 6 5 4 3 2 1
Date:
K.N.
29-Jan-2004
Revision: A
ENG. APP.
CHECKED
DRAWN
DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT
COPYRIGHT
R2R-R7R = 68R
L2R-L7R = 18nH
BAS16
G5Y-254P
RL1R
Power Fail Fail Alarm contact closure to ground. Signal Fail Fail Alarm contact closure to ground.
J2 optional power in (used when fitted to FRU-1030 frame)
JP2 N/C
JP1 N/C
SK3
SK4
SK5
SK6
OUTPUTS SK7
6
2
4
2
5
Not Fitted
P3 3
1
2
Output Driver circuit
1 26-08-2003
Drawing No. 804823
Sheet 1 of 4
155/140 Mb/s Distribution Amplifier
DDA-3010
SK1 INPUT
IRT Electronics Pty. Ltd. ARTARMON NSW AUSTRALIA 2064
SCALE N.T.S.
A3
Title
1
SIZE
2 2
1
R1R 43R
L1R 18nH
SK2 PROTECTED OUTPUT
