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3060/V24
102001UA
1-4
INSTALLATION AND OPERATIONS MANUAL
OPERATION
PATTON ELECTRONICS CO.
Channel Tail Circuits
A buffer is built into the unit for tail circuit (DCE to DCE) applications. An 8 bit centered ring
buffer is used to correct the clock phasing errors generated between the Modem on the
Master Port and the Sub-Channel port for the data transferred from the Sub-Channel to the
Master Port. If the unit is operated in an asynchronous environment the buffer must be
bypassed. This is accomplished by moving the SYNC/ASYNC switch to ASYNC.
Interface Connections
All connections are made via industry standard EIA RS-232 DB-25 female connectors located
on the rear of the unit. The Following interface leads are implemented, Chassis (1), TXD (2),
RXD (3), RTS (4), CTS (5), DSR (6), Sig Gnd (7), DCD (8), Plus Unreg (9), Minus Unreg (10),
TXC (15), RXC (17), DTR (20), XTXC (24). Pins 9 & 10 can be disabled by Jumpers on the
PCB.
Front Panel LEDs
Front panel LEDs are provided to indicate power is applied, RXD and TXD activity from the
Master Port, Sub-Channel activity of each individual Port, Anti-Stream condition of each Sub-
Channel and an indication of clock Fallback condition.
Channel Enable / Disable Switches
Front panel switches allow operator intervention to remove an individual Sub-Channel from
accessing the Master Port. Positive latching type switches are provided for each Sub-
Channel port for isolating or removing a streaming terminal. The Sub-Channel is activated by
pushing the switch until it is in the “
ININ
ININ
IN” position. The switch will indicate GREEN in color. To
disable a Sub-Channel push the switch until it locks in the “
OUTOUT
OUTOUT
OUT” position, the switch will
indicate BLACK in color. Disabling a Sub-Channel with the front panel does not prevent the
Sub-Channel from receiving data from the Master Port only from sending data to the Master
Port.
Power Supply
A linear power supply is located internally, an external 110/220VA switch is located on the rear
of the unit. If chassis ground and signal ground need to be tied together this can also be
accomplished by switch selection. The unit is Rackmountable for 19" or 23" cabinets, by
ordering an optional Rackmount Kit. Safety approvals granted are UL, CSA and TÜV as well
as emission approval for FCC Class A.