3480-ddc.ib.rev8.doc
page 16 of 20
17/10/2007
Electrical characteristics:
Electrical characteristics CCITT G.703 2048 Kb/s:
Pair each direction
One coaxial pair.
Test load impedance
75
Ω
resistive.
Signal level
2.37 V.
Nominal pulse width
244 ns.
Code conversion
HDB3.
Pulse shape
Fig. 15/G.703.
Jitter at input port
§ 3 of recommendation G.823.
Jitter at output port
§ 2 of recommendation G.823.
Return loss at input ports:
51 KHz to 102 KHz
12 dB
102 KHz to 2048 KHz
18 dB
2048 KHz to 3072 KHz
14 dB
Electrical characteristics CCITT G.703 8448 Kb/s:
Pair each direction
One coaxial pair
Test load impedance
75
Ω
resistive
Signal level
2.37 V
Nominal pulse width
59 ns
Code conversion
HDB3
Pulse shape
Fig. 16/G.703
Jitter at input port
§ 3 of recommendation G.823
Jitter at output port
§ 2 of recommendation G.823
Return loss at input ports:
211 KHz to 422 KHz
12 dB
422 KHz to 8448 KHz
18 dB
8448 KHz to 12672 KHz
14 dB
Electrical characteristics CCITT G.703 34368 Kb/s:
Cable type
Coaxial.
Impedance 75
Ω
Signal level
1.0 V
Nominal pulse width
14.55 ns
Code conversion
HDB3
Pulse shape
Fig. 17/G.703
Jitter at input port
§ 3 of recommendation G.823
Jitter at output port
§ 2 of recommendation G.823
Return loss at input ports:
860 KHz to 1720 KHz
>12 dB
1720 KHz to 34368 KHz
>18 dB
34368 KHz to 51550 KHz
>14 dB
Electrical characteristics CCITT G.703 Shaped 44736 Kb/s:
Cable type
Coaxial.
Impedance 75
Ω
Signal level
Power at 22368 KHz
+1.8 dBm to +5.7 dBm.
Power at 44736 KHz
>20 dBm below power at 22368 KHz.
Code conversion
B3ZS
Pulse shape
Fig. 14/G.703
Electrical characteristics CCITT G.703 Unshaped 44736 Kb/s:
Cable type
Coaxial.
Impedance 75
Ω
Signal level
1.0 V
Nominal pulse width
14.55 ns
Code conversion
B3ZS
Pulse shape
Fig. 17/G.703
Jitter at input port
§ 3 of recommendation G.823
Jitter at output port
§ 2 of recommendation G.823
Return loss at input ports:
860 KHz to 1720 KHz
>12 dB
1720 KHz to 34368 KHz
>18 dB
34368 KHz to 51550 KHz
>14 dB
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