參數(shù)資料
型號(hào): NS32FX100VF
廠商: National Semiconductor Corporation
英文描述: System Controller
中文描述: 系統(tǒng)控制器
文件頁數(shù): 92/94頁
文件大?。?/td> 955K
代理商: NS32FX100VF
Appendix A: Codec Transmission Performance
The Sigma Delta Codec transmission performance of a typi-
cal complete system, including DAA, is according to the fol-
lowing test conditions:
The measurement analog circuit is according to Figure 2-5.
The measurements are performed on the line with 600
X
termination. The transmit and receive gains are pro-
grammed for amplification/attenuation of 0 dB. The Echo-
canceling filter is disabled. The transmission absolute accu-
racy is measured after auto-calibration of the measuring cir-
cuit.
Electrical test conditions:
T
A
e
25
§
C
Digital Supplies V
CCD
e
5V
g
10%, GND
e
0V.
Analog Supplies V
CCA
e
g
5V
g
5%,
V
EE
e
g
12V
g
10%.
TABLE A-1. Transmitter Performance
Parameter
Conditions
Min
Typ
Max
Unit
Tx Peak Level
b
2.1
a
2.1
V
Maximum Level
tx
a
3.14 dbmo
a
6.00
dbm
Transmit Gain
Absolute Accuracy
b
0.5
a
0.5
db
Transmit Gain
Variation with Frequency
300 Hz
b
0.5
a
0.5
db
500 Hz–3000 Hz
b
0.3
a
0.3
db
3400 Hz
b
2.0
a
0.0
db
3900 Hz
b
12
db
Transmit Noise
Psofometric Weighted
b
88
b
85
dbmPo
Spurious Out of Band
5.1 kHz–7.2 kHz
b
45
db
7.2 kHz–20 kHz
b
60
db
20 kHz–100 kHz
b
65
db
Signal to Total Distortion
Half Channel, Sine Method
(without transformer
distortion)
Level
e
3 dbmo
40
dbP
b
10 dbmo
67
69
dbP
(
b
18)D0 dbmo
60
dbP
(
b
38)D(
b
18)dbmo
40
dbP
b
45 dbmo
32
dbP
92
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