TYPICAL PERFORMANCE CURVES
At Output of HDSL Pulse Transformer
The curves shown below are measured at the line output of the HDSL transformer. Typical at 25°C, AVDD+ = +5V, DVDD+ = +3.3V, fTX = 1168kHz, unless otherwise specified.
POWER SPECTRAL DENSITY LIMIT
–20
–38dBm/Hz for T1
–40
–80dB/decade
T1
–40dBm/Hz for E1
E1
–60
–80
–118dBm/Hz
for T1
196kHz
292kHz
–120dBm/Hz
for E1
–100
–120
1K
10K
100K
Frequency (Hz)
1M
10M
CURVE 1. Upper Bound of Power Spectral Density Measured at Output of HDSL Transformer.
0.4T 0.4T
B = 1.07
C = 1.00
D = 0.93
1.25T
A = 0.01
E = 0.03
A = 0.01
F = –0.01
H = –0.05
14T
F = –0.01
–1.2T
50T
G = –0.16
–0.6T 0.5T
CURVE 2. Transmitted Pulse Template Measured at HDSL Transformer Output.
INPUT IMPEDANCE vs BIT RATE
200
150
100
T1 = 784kbps,
32kΩ
E1 = 1168kbps,
50
0
21kΩ
100
300
500
700
900
1100
1300
Bit Rate (kbps)
CURVE 3. Input Impedance of rxLINE and rxHYB.
®
5
AFE1124
BB [ BURR-BROWN CORPORATION ]
