參數(shù)資料
型號: PEF24901
英文描述: ISDN LINE INTERFACE|BASIC|CMOS|QFP|64PIN|PLASTIC
中文描述: 綜合業(yè)務數(shù)字網(wǎng)線接口|基本|的CMOS | QFP封裝| 64管腳|塑料
文件頁數(shù): 32/73頁
文件大?。?/td> 1618K
代理商: PEF24901
PEB 2466
PEF 2466
Operational Description
Hardware Reference Manual
23
2001-02-20
4.2.15
Out-of-Band Discrimination in Transmit Direction
With any 0 dBm0 sine-wave signal below 100 Hz and in the range from 3.4 kHz to 100
kHz (out-of-band signal) applied to an analog input (V
INx
), the level of any resulting
frequency component at the digital output will stay at least X dB (see
Table 18
) below
the output level of a 0 dBm0 1kHz sine-wave reference signal at the analog input.
Table 18
Out-of-Band Signals Applied to the Analog Inputs (V
INx
)
The Hardware Filters behind the A/D Converters reject teletax pulses with their poles at
12 kHz ±150 Hz and 16 kHz ±150 Hz.
Figure 13
Out-of-Band Discrimination in Transmit Direction
Input Frequency
Min. Output Signal Rejection
X
25
10
Unit
Test Conditions
0 Hz to 60 Hz
60 Hz to 100 Hz
dB
dB
dB
0 dBm0 sine-wave input
signal on V
IN
3.4 kHz to 4 kHz
4 kHz
15
dB
dB
4 kHz to 4.6 kHz
4.6 kHz to 100 kHz
40
dB
14
π
4000
1200
f
--------------------
sin
1
18
π
4000
1200
f
--------------------
sin
7
9
--
0
0
kHz
f
100
0.06 0.1
3.4
4
4.6
6
10
18
10
20
30
40
dB
T
D
25
32
15
2466_214
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