User manual
CONFIDENTIAL Protium Technologies, Inc. 4050-9901
Rev No: 05
5 GHz RF Modem 31-Jan-2007 13 of 84
This document and information contained herein is subject to the restrictions set forth on the title page
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or
>
clock loop
2.2.3.2.3 Interface Type
The serial interface may use either EIA-232 or EIA-530 drivers and receivers. Either type of interface may be
used with both synchronous and asynchronous data.
Each end of the link may be configured independently.
The interface type may be configured with the command
>
interface 232
or
>
interface 530
2.2.3.3 Data Sharer
The rack-mount unit (4050R) includes a built in data sharer function where two separate EIA-530/232 ports are
provided, designated ports A and B.
At any given time one of the ports will be the ‘selected’ port. The currently selected port depends on the status of
the request-to-send (RTS) line on the two ports. If only one port has RTS asserted, that port will be the selected
port. If both ports, or neither port, has RTS asserted, then port A is given priority and will be the selected port.
The RTS line from either port may be enabled or disabled if desired.
Transmitted data (TD) and the external transmit clock (TSET) used in synchronous mode are always taken from
the selected port. The remote and local loopback signals (RL and LL) are also taken from the selected port. Clear-
to-send (CTS) will only be asserted on the selected port.
The system may be configured to send receive data to both ports or to the selected port only. The data-set-ready
(DSR), receive clock (RSET), and data-carrier-detect (DCD) are always present on both ports.
2.2.3.3.1 RTS Enable
Enable the RTS signal on one or both ports as required. If a port is unused and has no cable connected, it is
strongly recommended that the corresponding RTS signal be disabled. The RTS enable may be set with one of the
following commands:
> rtsenable a
or
> rtsenable b
or
> rtsenable both
2.2.3.3.2 RX Data Output
Enable sharer data output on both ports or only on the selected port, as desired, with one of the following
commands:
> sharerout selected