- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄223860 > GS1515-CQM (Electronic Theatre Controls, Inc.) HDTV Serial Digital Reclocker PDF資料下載
參數(shù)資料
| 型號(hào)： | GS1515-CQM |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | HDTV Serial Digital Reclocker |
| 中文描述： | 高清晰度電視串行數(shù)字時(shí)鐘恢復(fù)器 |
| 文件頁數(shù)： | 2/17頁 |
| 文件大?。?/td> | 336K |
| 代理商： | GS1515-CQM |
522 - 23 - 01
10
G
S
151
5
lock
time.
Therefore,
there
is
a
trade-off
between
asynchronous lock time and jitter peaking/stability. These
capacitors should be as large as possible for the allowable
lock time and should be no smaller than the allowed value.
With the recommended values, jitter peaking of less than
0.1dB has been measured at the lower loop bandwidth as
shown in Figure 15. At higher loop bandwidths, it is difficult
to measure jitter peaking because of the limitation of the
measurement unit.
Fig. 15 Typical Jitter Peaking
However,
because
relatively
larger
CCP1
and
CCP2
capacitors can be used, over-damping
of the loop
response occurs. An accurate jitter peaking measurement
of 0.1dB for the GS1515 requires the modulation source to
have a constant amount of jitter modulation index (within
0.1dB or 1.2%) over the frequency range beyond the loop
bandwidth.
It has been determined that for 282.9kHzUI, the minimum
value of the CCP1 and CCP2 capacitors should be no less
than
0.5F.
For
added
margin,
1F
capacitors
are
recommended. The 1F value gives a lock time of about
60ms in one attempt. For 25.72kHzUI, these capacitors
should be no less than 5.6F. This would result in 340ms of
lock time. If needed, extra margin could be built by
increasing these capacitors at the expense of a longer
asynchronous lock time.
Bandwidths lower than 129kHz at 0.2UI modulation have
not been characterized, but it is believed that the
bandwidth could be further lowered. Since a lower
bandwidth has less correction for noise, extra care should
be taken to minimize board noise. Figures 16 and 17 show
the two measured loop bandwidths at these two settings.
Table 1 summarizes the two bandwidth settings.
Fig. 16 Typical Jitter Transfer Curve
at setting A in Table 1
Fig. 17 Typical Jitter Transfer Curve
at setting B in Table 1
.
TABLE 1: Loop Bandwidth Setting Options
RCP1
CCP3
CCP1
CCP2
BW
FACTOR
BW at 0.2UI JITTER
MODULATION
INDEX
ASYNCHRONOUS
SYNCHRONOUS
A
Open
1.0
282.9kHz
1.41MHz
60ms
1.25s
B
50
1.0
5.6
25.72kHz
129kHz
340ms
11.0s
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GS1515-CTM | HDTV Serial Digital Reclocker |
| GS2008HET/R7 | 2 A, 800 V, SILICON, RECTIFIER DIODE |
| GS4576S09L-25 | DDR DRAM, PBGA144 |
| GS54180RK | 1 ELEMENT, 18 uH, GENERAL PURPOSE INDUCTOR, SMD |
| GS54180RJ | 1 ELEMENT, 18 uH, GENERAL PURPOSE INDUCTOR, SMD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GS1515-CTM | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:HDTV Serial Digital Reclocker |
| GS1522 | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:HDTV Serial Digital Serializer |
| GS1522_04 | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:HDTV Serial Digital Serializer |
| GS1522-CQR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Gennum Corporation 功能描述: |
| GS1522-CQRE3 | 制造商:Gennum Corporation 功能描述:Monolithic Bipolar Integrated Circuit 128-Pin MQFP |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。