Rainbow Electronics DS26502 - Manual (Page 13)

DS26502 T1/E1/J1/64KCC BITS Element
13 of 125
Figure 3-2. Loopback Mux Diagram
Figure 3-3. Transmit PLL Clock Mux Diagram
TX PLL
OUTPUT = 1.544MHz,
2.048MHz, 64kHz,
6.312MHz
JA CLOCK
RECOVERED CLOCK
PLL_OUT PIN
TX CLOCK
TCLK PIN
TPCR.2
TPCR.0
(TCSS0)
TPCR.1
(TCSS1)
TPCR.5
IN
SEL
OUT
SEL
TPCR.3
TPCR.4 TPCR.6
TPCR.7
(HARDWARE MODE PIN NAME)
FROM RX
LIU
TO TX
LIU
CLOCK
+ DATA
- DATA
CLOCK
+ DATA
- DATA
TO RX
FRAMER
FROM TX
FORMATTER
RCLK
+ DATA
- DATA
TX CLOCK
+ DATA
- DATA
REMOTE
LOOPBACK
(LBCR.4)
LOCAL
LOOPBACK
(LBCR.3)
JITTER
ATTENUATOR
ENABLED AND
IN RX PATH
JITTER
ATTENUATOR
ENABLED AND
IN TX PATH