Section 365–361–206
10
12.1.1. Electrical (End-to-End 7 5/6-Bit Operation)
(b) IMPEDANCE: 600 ohms, balanced.
(c) TRANSMIT AND RECEIVE LEVEL RANGES: +10 to –22.5dBm.
(d) LINE SIDE LEVELS:
Transmit (fixed): +5.2dBm TLP
Receive (fixed): +5.2dBm TLP
(e) ADJUSTABLE GAIN:
Transmit
Minimum: 0.0dB
M32.5dB
Step:0.1dB
Receive
Minimum: 0.0dB
M32.5dB
Step: 0.1dB
(f) TRANSMIT AND RECEIVE PATH FREQUENCY RESPONSE (Referenced at 1kHz):
Frequency (Hz)
XMT (dB)
RCV (dB)
60
-14 maximum
—
200
-2 to 0.5
–1 to 0
300
+/–0.15
+/–0.15
1000
0 (REF)
0 (REF)
3000
+0.15
+0.15
3200
–0.75 to +0.15
–0.75 to +0.15
3400
-1.5 to 0
-1.5 to 0
4000
-14 maximum
-14 maximum
4600
-32 maximum
-32 maximum
(g) 1000Hz GAIN:
Transmit (fixed): –4.8dB
Receive (fixed): –27.7dB
(h) LOSS STABILITY:
0.5dB maximum of reference loss.
(i) LEVEL TRACKING:
0.25dB from +3 to –37dBm0;
0.5dB from –37 to –50dBm0.
(j) RETURN LOSS: 29dB minimum at 1kHz; 24dB minimum at 300 to 3000Hz.
(k) CROSSTALK (All modes):
Frequency (Hz)
Single-Ended Level
1000
–71dBm0
2000
–70.5dBm0
3000
–70dBm0
(l) LONGITUDINAL BALANCE:
Frequency (Hz)
AT&T Method (dB)
IEEE Method (dB)
200
86
74
1000
80
74
3000
78
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