3080/V24
124001UA
2-5
S
ETUP
& I
NSTALLATION
P
ATTON
E
LECTRONICS
C
O
.
I
NSTALLATION
A
ND
O
PERATIONS
M
ANUAL
Fallback Clock Enable (SW-30-6)
(default ON)
If Clock Fallback is required when the primary clock fails, set switch SW30-6 to
OFF
. If
Fallback is not required set SW30-6 to
ON
. The Fallback clock rate is selected with the
internal baud rate option. When enabled, the Front Panel FBC LED will light if clock Fallback
occurs.
Fallback Clocking From Sub-Channel 6 (SW30-1,2,3)
To use the Sub-Channel 6 RX Clock as the fallback clock set SW30-1, 2 and 3 to
OFF
. Any
other position will select some internal clock rate as called out in the Internal Baud Rates
section.
Only Sub-channel 6 can be used as the fallback clock.
Fallback Mode Selection (SW30-5)
(default ON)
If Fallback is required, two modes are available via switch SW30-5. To fallback when the
transitions from the primary clock source stop, set SW30-5 to
ON
. To fallback when DCD on
Sub-Channel 1 becomes inactive, set SW30-5 to
OFF
.
NOTE: Both TX and RX Clock Source Select MUST Be Set !!!!
TX Clock Source Selection (SW27--1,2,3)
TX Clock Source is selected by switch SW27-1, 2 and 3. The following table indicates the
source options provided by the 3080/V24 (CTS DSD-8).
SW27-1
SW27-2
SW27-3
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
Port 5
ON
OFF
OFF
Port 6
OFF
OFF
OFF
Internal
TX Clock Pin Selection (SW27-4)
(default ON)
The primary transmit clock can be derived from either pin 15 or 24. If pin 15 is to be the
source for primary TX Clock, set SW27-4 to
ON
. If pin 24 is to be the source for primary TX
and RX Clock, set SW27-4 to
OFF
.