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參數(shù)資料
| 型號(hào)： | CD22103AD |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | CMOS HDB3 High Density Bipolar 3 Transcoder for 2.048/8.448Mb/s Transmission Applications |
| 中文描述： | DATACOM, HDB3 ENCODER/DECODER, CDIP16 |
| 封裝： | SIDE BRAZED, DIP-16 |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大小： | 47K |
| 代理商： | CD22103AD |
73
Definition of HDB3 Code Used in CD22103A HDB3
Transcoder (As Per CCITRT G703 Annex
Recommendations) and Error Detection
Coding Of A Binary Signal Into An HDB3 Signal Is Done
According To The Following Rules:
1. HDB3 signal is pseudoternary; the three states are
denoted B+, B-, and 0.
2. Spaces (zeros) in the binary NRZ signal are coded as
spaces in the HDB3 signal. For strings of four spaces,
however, special rules apply (See Item 4 below).
3. Marks (ones) in the binary signal are coded alternately as
B+ and B- in the HDB3 signal (alternate mark inversion).
Violations of the rule of alternate mark inversion are intro-
duced when coding strings of four spaces (See Item 4
below).
4. Strings of four spaces in the binary signal are coded
according to the followinq rules:
A. The first space of a string is coded as a space if the polar-
ity of the preceding mark of the HDB3 signal has a polarity
opposite to the preceding violation and is not a violation by
itself; it is coded as a mark, i.e., not a violation (i.e., B+ or
B-), if the preceding mark of the HDB3 signal has the same
polarity as that of the preceding violation or is by itself a
violation.
This rule ensures that successive violations are of alter-
nate polarity so that no DC component is introduced.
B. The second and third spaces of a string are always coded
as spaces.
C. The last space of a string of four is always coded as a
mark, the polarity of which is such that it violates the rule of
alternate mark inversion. Such violations are denoted V+
or V- according to their polarity.
FIGURE 5. CRX RECONSTRUCTION REQUIREMENTS
FIGURE 6. RECEIVER ALARM-INHIBIT-SIGNALS TIMING WAVEFORMS
FIGURE 7. RECEIVER ERROR-SIGNALS TIMING WAVEFORMS
CKR
CRX
50%
50%
t
P
t
D
τ
τ
CRX
NRZ - OUT DATA
RAIS
AIS
CRX
+HDB3 IN
-HDB3 IN
ERR
CD22103A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CD22103AE | CMOS HDB3 High Density Bipolar 3 Transcoder for 2.048/8.448Mb/s Transmission Applications |
| CD22203E | 5V Low Power DTMF Receiver |
| CD22202 | 5V Low Power DTMF Receiver |
| CD22202E | 5V Low Power DTMF Receiver |
| CD22203 | 5V Low Power DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CD22103AE | 制造商:HAR 功能描述:22103A HAR'93 |
| CD22103E | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CD22104E | 制造商:Harris Corporation 功能描述: |
| CD22105AE | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CD221N | 制造商:Schneider Electric 功能描述:SWITCH FUSIBLE GD 240V 30A 2P NEMA1 |
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