Lemar CCITT G.703 Series User manual
All contents above are subjected to change without notice.
www.lemar.com.tw
CCITT G.703 D-Sub 37 Pin, Male to Female
Features:
•Connects 75 ohm dual coax to 120 ohm twisted pair
•Bi-directional signal conversion according to CCITT G.703
•Miniature size with mounting supports
•37pins D-Sub connectors provided
Description:
The CCITT G.703 balun panel matches multiple sets of dual 75 ohm coax connections to multiple 120 ohm twisted pair
connections. Supporting E1 bit rates up to 2 Mbit/s and E2 to 8 Mbit/s, the panel bi-directionally match, not only signal
impedance, but also the pulse shapes of the signals according to the CCITT G.703 standard.
Specification:
Bit Rates:
2 Mbit/s (E1) 8 Mbit/s (E2)
Impedance:
75 ohm to 120 ohm
Insertion loss:
Max. 0.2dB
Max. 0.3dB
Max. 0.9dB from 0.2-70MHz
Return loss:
-29dB
-21B
-15dB from 1 to 70 MHz
Cross talk:
40dB typical
Pin IN/OUT:
Port 1: 1+/2- Port 2: 3+/4- Port 3: 6+/7- Port 4:8+/9-
Port 5: 11+/12- Port 6: 13+/14- Port 7: 16+/17- Port 8:18+/19-
Port 9: 20+/21- Port10: 22+/ 23- Port11: 25+/ 26- Port12:27+/28-
Port13:29+/30- Port14: 31+/ 32- Port15: 34+/ 35- Port16:36+/37-
Dimension:
110*70*28 in mm
Lemar Industrial Corporation
51, Lane 40, Dashing Street, 704 Tainan, Taiwan R.O.C
Tel: +886-6-358-8686 | Fax: +886-6-358-9797 | Email: sales@lemar.com.tw | Web: www.lemar.com.tw
All contents above are subjected to change without notice.
www.lemar.com.tw
Installation:
1. Make the connections to all ports both at 75 ohms(Female) and 120 ohms (male) sides by following the pin IN/OUT
shown above .
2. The total allowable cable lengths are subject to the constraints of the ITU/CCITT G.703 recommendation. However, we
recommend a total patch cable length, including coaxial and twisted pair cabling, of no more than 180m.
Warranty:
Seller warrants that this product is to be free from defect in materials and workmanship for one (1) year. The warranty given by
seller is in lieu of any other warranties, express or implied. This warranty does not apply to units abused through misuse or
subjected to improper and/or excessive voltage, beyond our control. Seller assumes no responsibility for damages or penalties
incurred resulting from the use of this product. Seller’s liability under any warranties shall be discharged by replacing or repairing,
at our option, the defective product. Seller’s liability for any product shall not exceed a refund of the purchase price. The warranty
listed here is intended only as a summary of your full and complete warranty.
Caution:
Do not attempt to open the body, as there are no user-serviceable parts inside Balun. Opening the unit will void your warranty.
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