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3810-rwt.ib.rev1.doc 

Page 5 of 11

 17/10/2007

 

 RWT-3810 / RWR-3810 Technical specifications 

 
RF signal connections 

75 ohms SMC on rear connector panel. (BNC and F 
adapters provided.) 

 
RF input level 

Adjustable in the range 

 

-40 dBm to –20 dBm total power. 

 
RF output level 

Adjustable in the range 

 

-45 dBm to –20 dBm total power. 

 
Input / output VSWR 

<2:1 (75 

 / 50 

). 

 
System 3rd order intercept (IP3) 

>+10 dBm. 

 
System frequency response 

900 MHz to 2050 MHz operation 

 
500 MHz flatness 

± 1.5 dB 

36 MHz flatness 

± 0.5 dB 

 
System group delay 

± 2 ns, 900 MHz - 2050 MHz 

 
Carrier to noise 

>26 dB for 36 MHz bandwidth 

 
Inter-modulation products. 

 < 40 dBc. 

 
Optical output power 

-7 to -10 dBm. 

 
System optical budget 

> 4 dB. 

 
Optical signal connections 

SC  angle  faced (accessible from the rear of the 
module) for use with single mode (9/125

µ

m) fibre 

cable. 

 
LNB Power 

13V or 18V input to RWT-3810 rear panel, SK3. 

 
Power requirement 

14V-0-14V AC /3.5 VA 

 
Temperature range 

0 - 45° C ambient 

 
Mechanical 

6 HP x 3 U x 220 mm  IRT Eurocard 

 

Suitable for  mounting in IRT 19" rack chassis. 
Fibre, RF & alarm connections at the rear. 

 
Finish:  

Front escutcheon 

Grey with black lettering & red IRT logo 

 
 

Rear assembly 

Detachable silk screened PCB with direct mount 
connectors to Eurocard and external signals 

 
Standard accessories 

Matching control connector is supplied with the TX 
module, and RF adapter connectors for conversion 
to BNC and F is supplied with both modules. 

 
Optional accessories 

TME-6 module extender card 

 

NOTE:

 

All the parameters specified are only applicable when using single mode (9/125

µ

m) fibre cable with a 

return loss of >= 27 dB. 
 

Due to our policy of continuing development these specifications are subject to change without notice.

 

IRT 

Communications 

www.irtcommunications.com

Summary of Contents for RWR-3810

Page 1: ...ct 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...

Page 2: ...Section Page General description 3 Technical specifications 5 Pre installation 6 Operational safety 6 Installation 7 Installation in frame 7 Front and rear layouts 9 Maintenance storage 10 Warranty s...

Page 3: ...nel for laser power ON and FAIL indication green for normal and red for failure and after passing through a relay circuit a LASER POWER ALARM is available as an external connection The adjustment and...

Page 4: ...ilure and with LK1 closed will operate a relay circuit an ALARM contact set is available as an external connection The adjustment and connection data for this circuit is given in the installation sect...

Page 5: ...de 9 125 m fibre cable LNB Power 13V or 18V input to RWT 3810 rear panel SK3 Power requirement 14V 0 14V AC 3 5 VA Temperature range 0 45 C ambient Mechanical 6 HP x 3 U x 220 mm IRT Eurocard Suitable...

Page 6: ...ar care should be taken to ensure that the frame is connected to earth for safety reasons See frame manual for details Signal earth For safety reasons a connection is made between signal earth and cha...

Page 7: ...connector will need to be terminated with the 75 ohms termination provided when not in use Optical signal connection is made to the SC APC optical connector on the rear of the RWT 3810 Extreme care mu...

Page 8: ...circuit is wired to give a relay contact closure when a fault condition such as power failure or low optical input occurs A second alarm contact closure is available at J3 RWT 3810 adjustments RV1 set...

Page 9: ...to module 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 L BAND F O TX...

Page 10: ...inable 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 substitutio...

Page 11: ...ge 11 of 11 17 10 2007 Drawing index Drawing Sheet Description 804586 RWT 3810 schematic block diagram 804421 RWR 3810 schematic block diagram I R T C o m m u n i c a t i o n s w w w i r t c o m m u n...

Page 12: ...Present Pilot Generator Pilot SK2 RF IN RF MON L Band Fibre Optic Tx 1 2 J3 LASER PILOT GAIN MON DC 2 1 LK2 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...

Page 13: ...RF OUT RF MON L Band Fibre Optic Rx 1 2 J3 OPTICAL PILOT GAIN MON DC 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...

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