AR 10046249, Operating And Service Manual, Page: 29 / 58

Model 150/150AW1000
Rev C 9
Table 2-1. RS-232 Port Settings
Word Length 8 bits
Stop Bits: 1
Baud Rate: 19.2 kbps
Parity: None
HW Handshake: None
Table 2-2. RS-232 (DCE) Port Pinout Diagram DB-9 Female
Pin 1 DCD
Pin 2 TD
Pin 3 RD
Pin 4 DTR
Pin 5 GND
Pin 6 DCR
Pin 7 CTS
Pin 8 RTS
Pin 9 Unused
2.4.3 Fiber-Optic Communications
The Fiber-Optic port is a serial communications bus. All commands and queries through this port must be
terminated with a <LF>. When a valid query is received, it is processed and the result is immediately
transmitted back over the Fiber-Optic interface. This port is designed to time-out if there is no activity on the
bus for more than 5 seconds. At this time the internal buffer is cleared and a TIMEOUT_ERROR<LF> message
is sent out from this port.
The Fiber-Optic port provides the user with the ability to optically isolate the controlling PC from the amplifier.
This can be useful where the amplifier is placed in an environment where RF/Microwave energy could be
coupled onto a connection to one of the “wired” communications ports and fed back to the controlling PC.
Both optical connections (Tx and Rx) are optimized to work with light at a wavelength of 820nm. For more
detailed specifications on this port, consult the Avago HFBR series datasheet found at www.avagotech.com .
A glass, multi-mode, fiber-optic cable of 200um is recommended, however fiber-optic cable as small as 50um
can be used. The connector type for this port is ST.
This port can be used with either an AR IF7000 RS-232 to Fiber-Optic Interface or an AR IF7001 USB to Fiber-
Optic Interface. Note that these devices use SMA connectors so a fiber-optic cable is needed with ST connectors
on one end and SMA connectors on the other. This cable can be obtained from a fiber-optic cable distributor
such as FIS. Their web-site can be found at www.fiberinstrumentsales.com . An example cable that will work
for this connection is FIS Part Number D615M7FIS. The 7 in the part number refers to the length of the cable.
In this case the length is 7 meters.