INSTALLATION AND MAINTENANCE MANUAL
E1 FAMILY
LICENSED & SPREAD SPECTRUM RADIOS
JUNE 2001
SECTION 5: APPENDICES
PAGE 5-1
5. Appendices
Appendix A - Digital Line Interface Specifications
Information in Appendix A is referenced to the following document: ITU-T G.703
1 .
1 .
G e n e r a l C h a r a c t e r i s t i c s
G e n e r a l C h a r a c t e r i s t i c s
Bit rate:
2048 kbits/s
±
50 ppm
Code:
HDB3
2 .
2 .
S p e c i f i c a t i o n s a t t h e o u t p u t p o r t s
S p e c i f i c a t i o n s a t t h e o u t p u t p o r t s
Bit Rate
2.048 Mb/s
Pulse Shape
All marks of a valid signal must conform with the mask irrespective of
the sign. The value V corresponds to the nominal peak value.
Pair(s) in each Direction
One Coaxial pair
Test load impedance
75 ohms resistive
Nominal peak voltage
of a mark (pulse)
2.37 V
Peak voltage of a space
(no pulse)
0
±
0.237 V
Nominal pulse width
244 ns
Ratio of the amplitudes
of positive and negative
pulses at the center of
the pulse interval
0.95 to 1.05
Ratio of the widths of
positive and negative
pulses at the nominal
half amplitude
0.95 to 1.05
T a b l e A
T a b l e A -- 1 : C E P T
1 : C E P T -- 1
1 I n t e r c o n n e c t i o n S p e c i f i c a t i o n
I n t e r c o n n e c t i o n S p e c i f i c a t i o n
