3040/V35
139001UA
2-6
I
NSTALLATION
A
ND
O
PERATIONS
M
ANUAL
S
ETUP
& I
NSTALLATION
P
ATTON
E
LECTRONICS
C
O
.
NOTE: Both T X and RX Clock Source Select MUST Be Set !!!!
TX Clock Source Selection (SW17-1,2,3)
TX Clock Source is selected by switch SW17-1, 2 and 3. The following table indicates the
source options provided by the 3040/V35 (CTS MD-V.35/TCB). When using the unit in Async
Mode, the INTERNAL clock source must be selected.
SW17-1
SW17-2
SW17-3
Source
ON
ON
ON
Master
OFF
ON
ON
Port 1
ON
OFF
ON
Port 2
OFF
OFF
ON
Port 3
ON
ON
OFF
Port 4
OFF
ON
OFF
unused
ON
OFF
OFF
unused
OFF
OFF
OFF
Internal
TX Clock Pin Selection (SW17-4)
The primary transmit clock can be derived from either pins Y,AA or pins U,W. If pins Y,AA are
to be the source for primary TX Clock, set SW17-4 to
ON
ON
ON
ON
ON
. If pins U,W are to be the source for
primary TX & RX Clock, set SW17-4 to
OFF
OFF
OFF
OFF
OFF
.
RX Clock Source Selection (SW18-4,5,6)
RX Clock Source is selected by SW18-4, 5 and 6. The following table indicates the source
options provided by the 3040/V35 (CTS MD-V.35/TCB). If the TXC source is pins U,W, both
RXC and TXC will be sourced from pins U,W. When the unit is used in an Async network
select INTERNAL as the source of the RX Clock.
SW18-4
SW18-5
SW18-6
Source
ON
ON
ON
Master
OFF
ON
ON
Port 1
ON
OFF
ON
Port 2
OFF
OFF
ON
Port 3
ON
ON
OFF
Port 4
OFF
ON
OFF
unused
ON
OFF
OFF
unused
OFF
OFF
OFF
Internal
Internal Must Be Selected For
Async Operation
