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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
IRT Eurocard
Types DDA-3280
2 Mb/s G.703 Data Distribution Amplifier
&
ZDA-3280RH
Handshake changeover assembly
Designed and manufactured in Australia
IRT can be found on the Internet at:
http://www.irtelectronics.com
page 1 of 16
23/07/2002
3280-dda.ib.doc
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Summary of Contents for IRT DDA-3280
- Page 1 +61 2 9439 7439 Email: sales@irtelectronics.com Web: www.irtelectronics.com IRT Eurocard Types DDA-3280 2 Mb/s G.703 Data Distribution Amplifier & ZDA-3280RH Handshake changeover assembly Designed and manufactured in Australia IRT can be found on the Internet at: http://www.irtelectronics.com page 1 of 16 23/07/2002 3280-dda.ib.doc...
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Page 2: Table Of Contents
IRT Eurocard Type DDA-3280 2 Mb/s G.703 Data Distribution Amplifier & ZDA-3280RH Handshake changeover assembly Instruction Book Table of Contents Section Page General Description Functional Diagrams Technical Specifications DDA-3280 Electrical Characteristics CCIT G.703 2048 kb/s ZDA-3280RH Characteristics of signal Coding Characteristics G.703 Data Signal Format... -
Page 3: General Description
Handshake changeover assemblie General Description The DDA-3280 data distribution amplifier is intended for use with data signals conforming to the ITU Rec. G.703 at the 2.048 Mb/s rate. The DDA-3280 is primarily intended for use in pairs with a double width rear assembly (ZDA-3280RH) for automatic path protection applications. -
Page 4: Functional Diagrams
Relay K 1 = Power fail bypass. Relay K 3 = Magnetic latching Main/Stby. AIS DETECTION DATA FAIL DETECTION MAIN/SBY LOGIC FOR K 3 Handshake diagram 2 x DDA-3280 with ZDA-3280RH RELAY RELAY RELAYS OUTPUTS K 1.2 K 1.3 K 3, 1RL1 & 1RL2... -
Page 5: Technical Specifications
170 mA. (5.5 VA) Temperature range 0 - 50° C ambient Mechanical Suitable for mounting in IRT 19" rack chassis types with input output and power connections on the rear panel Finish: Front panel: Grey enamel, silk-screened black lettering & red IRT logo... -
Page 6: Zda-3280Rh
ZDA-3280RH Technical Specifications Controls & alarms: Input: External changeover request A ground applied to this input will emulate the operation of the front panel switch “Change Request”. Outputs: Bypass Contact closure to ground if power has failed. General Alarm Contact closure to ground if a. -
Page 7: Characteristics Of Signal
Characteristics of signal Coding characteristics - G.703: The HDB3 (High Density Bi-polar of order 3) code as defined in G.703 for 2048 kb/s is as follows: Binary 1 bits are represented by alternate positive and negative pulses and binary 0 bits by spaces. Exceptions are made when strings of successive 0 bits occur in the binary signal. -
Page 8: Description Of Operation
Description of Operation See block diagrams commencing on page 4 and schematic diagrams at rear of this manual. Input: The G.703 input signal is connected to the input circuit of the amplifier. If no power is present, and the amplifier was active before the power was removed, then the signal will be directed to the output connector via K 1 and K 3. - Page 9 AIS flag and the general alarm relay output will be activated connecting the general alarm output contact to ground. Note however that when data errors or no data is detected that the DDA-3280 does not generate an outgoing AIS data stream to the data outputs.
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Page 10: Handshake Operation
3 RU frame. Individual alarm outputs are provided for each module. Detailed operational description: Connections for handshake (paired) operation of two DDA-3280’s are shown in the following diagram. ZDA-3280RH handshake connections (Three switched outputs) Outputs... - Page 11 Operation: Handshake mode detection: Two data lines are present on the module rear connector to indicate to each module that it is to operate in handshake mode. The Loop signal on pin 16a is connected to ground when another module is connected and the Present signal on pin 16b detects the presence of power on the alternate module.
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Page 12: Pre-Installation
Pre-installation: Handling: This equipment may contain or be connected to static sensitive devices and proper static free handling precautions should be observed. 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. Power: AC mains supply: Ensure that operating voltage of unit and local supply voltage match and that correct... -
Page 13: Internal Adjustments
This module uses a programmable logic device as the main processing circuit. This device must be correctly programmed is only obtainable through IRT. No attempt should be made to substitute other devices or to programme a similar device as this could cause extensive damage to the module. -
Page 14: Front & Rear Panel Diagrams
Front & rear panel 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. 3280 ZDA-3280RH DD A- 3 2 8 0 MODULE 2 MODULE 1 2RL1 1RL1... -
Page 15: Warranty & Service
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. -
Page 16: Drawing Index
804066 DDA-3280 2 Mb DA schematic part 1. 804066 DDA-3280 2 Mb DA schematic part 2. 804066 DDA-3280 2 Mb DA signal path block diagram. 804066 DDA-3280 2 Mb DA external logic block diagram. 804184 ZDA-3280RH Handshake rear assembly schematic. - Page 21 1 10/01/99...
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