參數(shù)資料
型號: GS1574
廠商: Gennum Corporation
英文描述: GS1574 HD-LINX -TM II Adaptive Cable Equalizer
中文描述: GS1574的HD - LINX進程,商標II自適應電纜均衡器
文件頁數(shù): 12/17頁
文件大小: 222K
代理商: GS1574
GS1574 Preliminary Data Sheet
Proprietary and Confidential
28854 - 2
December 2004
12 of 17
Figure 4-1: Typical Output Voltage Levels
4.3 Programmable Mute Output
For SMPTE 259M inputs, the GS1574 incorporates a programmable threshold
output mute (MCLADJ).
In applications where there are multiple input channels using the GS1574, it is
advantageous to have a programmable mute output to avoid signal crosstalk.
The output of the GS1574 can be muted when the input signal decreases below a
certain input level. This threshold is determined using the input voltage applied to
the MCLADJ pin. The MCLADJ pin may be left unconnected for applications where
output muting is not required.
This feature has been designed for use in applications such as routers where
signal crosstalk and circuit noise cause the equalizer to output erroneous data
when no input signal is present. The use of a Carrier Detect function with a fixed
internal reference does not solve this problem since the signal to noise ratio on the
circuit board could be significantly less than the default signal detection level set by
the on chip reference.
NOTE: MCLADJ is only recommended for data rates up to 360Mb/s.
4.4 Mute
In addition to the programmable mute output, the GS1574 includes a MUTE input
pin that allows the application interface to mute the serial digital output at any time.
Set the MUTE pin HIGH to mute SDO and SDO.
50
50
SDO
SDO
+187.5mV
-187.5mV
V
CM
= 2.925V
typical
+187.5mV
-187.5mV
V
CM
= 2.925V
typical
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