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3010-dda.ib.rev1.doc 

Page 9 of 10 

05/07/2006 

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.  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 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: 

61 2 9439 3744 

Fax:  61 2 9439 7439 

Email: [email protected] 

Summary of Contents for DDA-3010

Page 1: ...ned 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 ...

Page 2: ... 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 equipm...

Page 3: ...s 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 ...

Page 4: ...nt LED green 155 Mb s operation LED green 140 Mb s LED yellow Alarm signal Power Loss Alarm N O or N C link selectable relay contact closure to ground on power failure Signal Failure Alarm N O or N C link selectable relay contact closure to ground on loss of input signal or loss of signal lock Power Requirements Voltage 28 Vac CT 14 0 14 or 16 Vdc Power consumption 3 VA 107 mA Other Temperature ra...

Page 5: ...amplitudes of the measured steady state amplitude 2 ns Transition timing tolerance referred to the Negative transitions 0 1 ns mean value of the 50 amplitude points of Positive transitions at unit interval boundaries 0 5 ns negative transitions 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...

Page 6: ...ate 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 al...

Page 7: ...te 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 normall...

Page 8: ...and rear assembly drawings are not to scale and are intended to show relative positions of connectors indicators and controls only SK10 3 Power Fail SK10 2 Alarm SK10 1 GND 3 2 1 SK10 RL1R SK1 SK6 SK4 SK3 SK7 SK5 SK2 OUTPUTS INPUT ZVA 3010RL POWER OFF BYPASS SK1 SK2 DC DDA 3010 N140 140 155 SIGNAL OUTPUT MON ...

Page 9: ... 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 re...

Page 10: ...3010 dda ib rev1 doc Page 10 of 10 05 07 2006 Drawing Index Drawing Sheet Description 804823 1 DDA 3010 Circuit Schematic ...

Page 11: ...6 08 2003 5V Input CD SD SD RATE Input Equaliser and Reclocking circuit 804823s2 sch 1 2 C35 100nF 1 2 F5 RXE020 POLYFUSE 5V 1 2 C42 10nF 1 2 C43 10nF 2 1 R55 N C 1 2 L3 0R0 1 2 J2 BNC 155 Mb s grn 2 1 R58 680R 2 1 LD3 HLMP 1503 5V 140 Mb s yell 2 1 R57 680R 2 1 LD2 HLMP 1401 5V 3 2 1 Q1 BSS123 3 2 1 Q2 BSS123 3 1 2 LK2 n c n o 10 1 5 RL2B 1 2 C41 10nF 3 8 RL2A V23026 5V 5V J2 optional power in us...

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