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Product Bulletin 933 — 1080
FM-12 DATA SET
A fully compatible, reliable data set
available in a variety of configurations
DESCRIPTION: The Rixon FM- 12 Data Set is a
low speed modem for transmitting and receiving
digital data over telephone circuits at speeds up
to 1200 bits per second ( 150 characters per sec-
ond). Built to comply with EIA RS - 232 B inter-
face standards, it is compatible with a wide vari-
ety of business machines and data processing
equipment.
VARIABLE CONFIGURATION: To meet a wide
range of applications, various configurations of
the FM - 12 are available. For OEM installations
where the data set is to be built into terminal
equipment, a plug-in module set which contains
all circuitry is available. The FM - 12 can also
be packaged as a complete assembly, with or with-
out a power supply, for mounting in a standard
19" rack. Also available is a unit for desk top
use or shelf mounting. For synchronous operation,
an optional clock is available.
USES TELEPHONE CIRCUITS: The FM - 12 oper-
ates over Type 3003 (Type 4A) telephone circuits
specified in FCC Tariff 260, "Private Line Ser-
vices." Type 3003 circuits are voice telephone
channels which have been conditioned for data
transmission.
AUTOMATIC OPERATION: When data is to be
transmitted or received, the data set is activated
automatically by a signal from the computer or
business machine. There are no controls with the
exception of an off -on switch included in some
configurations.
EASY MAINTENANCE: Operational status can be
quickly determined by using strategic test points
on the front of each module that are keyed to op-
erating and maintenance manual instructions. The
oscilloscope patterns shown in the manual are also
printed on a "service aid" template which is a-
vailable as an option.
PROVEN DESIGN STANDARDS: The FM-12 is
the newest of the Rixon Data Sets. The high stand-
ards of design perfection and operating reliabil -
ity that have given the other sets a reputation for
excellence have been employed in the design of
the FM - 12. Thousands of hours of trouble-free
operation can be expected.
For application information and prices contact:
RIXON ELECTRONICS, INC.
/
2120 Industrial Parkway Silver Spring,Maryland 20904
Telephone 301—622—2121
FM — 12 Data Set
SPECIFICATIONS
Data Rate Up to 1200 bits per second.
Modulation Frequency Shift Keying. Asynchronous.
Synchronous with optional clock.
Carrier Frequencies Mark; 1200 Hz. Space; 2200 Hz.
Line Requirements Type 3003 (4A) wireline circuit.
Operating Modes Full duplex, half duplex* or simplex.
Interfaces Data input, data output, request to
send, clear to send, carrier detector,
data set ready, transmit & receive
clock when used.
All interfaces conform to RS 232 B.
Transmit Line Signal Levels/ Impedance;
0 dbm or -8 dbm strap option, 600 ohm
output.
Receive Line Levels/ Impedance;
-35 dbm to +6 dbm, 600 ohm input.
Compromise equalization for Type 3003
circuit. Removable on request.
Control Functions Transmit: Clear to Send delay 8.5 ms
± .8 ms or 200 ms ± 20 ms.
Receive: Carrier detector
Power Requirements D.C c Power -20V @ 200 ma, +20V @ 250 ma.
Environmental Requirements Ambient Temperature Range 0° to 50° C
(32° to 122°F). Humidity 0-95%.
Altitude up to 10,000 ft.
Mechanical Specifications Module size 8^" x 5 ^/q" x 1", three
per data set.
Rack mounting assembly 19" wide, 7^" high,
8" deep.
*The output impedance of the transmitter can be adjusted to bridge the receiver input. This allows
half duplex operation over a two wire circuit without a mechanical change from transmit to receive.
I'd like to learn more about the Rixon FM-12 Data Set.
v
The application I have in mind is:
NAME TITLE
COMPANY
STREET
CITY STATE ZIP
BUSINESS REPLY MAIL
FIRST CLASS
PERMIT No. 846
Silver Spring, Md.
No Postage Stamp Necessary If Mailed In U. S.
Postage Will Be Paid By Addressee
RIXON ELECTRONICS, INC.
2120 INDUSTRIAL PARKWAY
SILVER SPRING, MARYLAND 20904
RIXON'S NEWEST DATA SET
GIVES YOU FLEXIBILITY AT LOW COST.
The Rixon FM-12 Data Set is a frequency shift keying modem for
data transmission up to 1200 bits per second (150 characters per second).
It is available in a variety of configurations to make it suitable for
OEM installations, rack mounting or desk top use.
Note the specifications of the FM-12 listed in the enclosed product
bulletin. If you've got a data transmission need that the FM-12 could
possibly fill, either immediately or in the future, please return the
enclosed business reply card. I'd like to talk to you about your application.
Sincerely,
Charles S. Krakauer
Vice President-Marketing
P. S. Rixon 's seven data set models will provide you data speeds from
150 to 4800 bits per second.
2120 INDUSTRIAL PARKWAY - MONTGOMERY INDUSTRIAL PARK - SILVER SPRING, MARYLAND
TELEPHONE: 622-2121
TWX: 301-622-2292