PM4541 데이터 시트보기 (PDF) - PMC-Sierra
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PM4541 Datasheet PDF : 46 Pages
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TELECOM STANDARD PRODUCT
PMC-920314
ISSUE 2
N
DSX-1
Transmit
e
t
AVD
w
o
r
k
DSX-1
Receive
TAP
BTPCM
BTSIG
BTFP
TAN
BTCLK
TC
BRFPI
BRCLK
RAS
REF
RRC
BRPCM
BRSIG
BRFPO
RCLKO
RFP
XCLK #1
AVS
AVS
37.056MHz
PMC-Sierra, Inc.
PM4541 T1XC-EVBD
T1XC EVALUATION DAUGHTERBOARD
BTPCM
BTSIG
BTFP
BTCLK
BRFPI
BRCLK
TAP
TAN
TC
BRPCM
BRSIG
BRFPO
RCLKO
RFP
#2 XCLK
RAS
REF
RRC
DSX-1
Transmit
C
u
AVD
s
t
o
m
DSX-1
e
Receive
r
AVS
AVS
Figure 2: Jitter Attenuating "CSU" Application Hookup
2.9 Transmit/Receive Interface
The daughterboard provides three different types of interfaces for the transmit and
receive signals. The two standard analog interfaces provided are a 100 ohm mini-
bantam interface and a 50 ohm BNC interface. The mini-bantams are terminated
with a 100 ohm resistor on the TN/RN pins to prevent an excessive voltage kick
when mini-bantam plugs are inserted or removed. The BNC connector barrel can
optionally be terminated with a resistor to ground, or grounded directly, by stuffing a
resistor or shorting strap in locations R15, R16, R17, and R18. The daughterboard
is shipped with these 4 locations empty, thereby providing a 50Ω BNC interface.
The third interface provided is strictly digital and brings out all of the T1XC's digital
DS-1 signals to header pins for easy test access. When the digital interface is used
each T1XC's analog receiver can be powered down by moving the jumper on
jumper block J31 or J32.
5
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