micro series receiver comes equipped with eight channels. When hooking up power
to your receiver, you may either connect a nicad battery pack to any unused channel
input or purchase one FMA Direct Y-Connector block (PN: 209) available through
your local hobby dealer. The Y-Connector block connects battery power and one
servo to one channel of the Fortress micro.
•
RANGE TEST
To assure proper performance, the Fortress micro series receiver must be range tested with
the "host" transmitter. The major reason for this important test is that over time, all R/C
transmitters are susceptible to de-tuning and frequency “drift”. To ensure the utmost in
secure RF reception, current technologies for narrow-banding used in FMA designs can
actually place a higher demand on transmitters. Power level and frequency accuracy of your
transmitter are more important than ever before. Therefore, for the initial range check and in
rare cases when you suspect degradation of performance from your R/C system, FMA would
like to suggest the following guidelines: Begin by placing the receiver on a cardboard box or
another non-metallic surface to elevate it about 2 feet off the ground. Connect only one servo
and the battery direct. Do not install a switch harness for the initial range test because switch
harnesses are often the cause of poor range. Perform the range test with the receiver
antenna fully extended VERTICALLY into the air on a dowel rod or the like, and the
transmitter antenna collapsed. Apply power and walk away from the receiver moving one
stick on the transmitter. You should obtain at least 200 feet of line-of-sight ground range if
everything is operating properly. If any loss of servo control occurs, the system must be
calibrated by an FMA service station. CALL (301) 831-8980 for FMA Direct technical
assistance. In certain cases, the FMA service station may ask you to send in your transmitter
along with your receiver.
•
ACCESSORIES:
Aileron extension cables, Y-harness, switch harness, and numerous other accessories as
well as a full line of servos, batteries, and chargers are available for use with your FMA
receiver either direct or from your local FMA dealer.
FMA LIMITED WARRANTY ON RADIO RECEIVER PRODUCTS
THE WARRANTY
FMA, Inc. warrants this receiver to be free of manufacturing defects for the term of one year from the
date of purchase. Should any defects covered by this warranty occur, the receiver shall be repaired
or replaced with a unit of equal performance by FMA, Inc., or an authorized FMA service station.
LIMITS AND EXCLUSIONS
This warranty may be enforced only by the original purchaser, who uses this receiver in its original
condition as purchased, in strict accordance with the Fortress micro series owner's manual.
Receivers returned for warranty service to an FMA service center will be accepted for service when
shipped post-paid, with a copy of the original sales slip or warranty registration form, to the service
station advised by FMA, Inc.
THIS WARRANTY DOES NOT APPLY TO
1.
Consequential or incidental losses resulting from the use of this receiver.
2.
Damage resulting from accident, crashes, misuse, abuse, neglect, electrical surges, reversed
polarity on connectors, lightning or other acts of God.
3.
Damage from failure to follow instructions supplied with the product.
4.
Damage occurring during shipment of the product either to the customer or from the customer
for service (claims must be presented to the carrier).
5.
Damage resulting from repair, adjustment, or any alteration to product by any one other than
an authorized FMA technician.
6.
Installation or removal charges, or damage caused by improper installation or removal.
CALL (301668-7614 FOR MORE INFORMATION ABOUT SERVICE AND WARRANTY REPAIRS.
OWNER'S MANUAL
NOTE: PLEASE READ MANUAL COMPLETELY BEFORE OPERATION
INTRODUCTION:
Thank you for purchasing the FMA Direct Fortress micro series receiver. Fortress micro
series receivers are designed to be the smallest, lightest, dual conversion R/C receivers
available. You may fly your Fortress micro in anything from indoor R/C to IMAA legal quarter
scale aircraft with complete confidence. Offered in either AM or FM versions, these high-
performance designs incorporate the latest advancements in RF technologies available to the
R/C industry. Superior RF mixer technology and advanced circuitry for detecting and
amplifying PPM information enables the Fortress micro series to out-perform other single and
dual conversion designs presently offered. Heavy-duty, SMT construction on a single, glass-
epoxy P.C. board provides outstanding reliability. New, universal operation makes user-
programmable shift switching a snap in the FM version. This means that the same FM
receiver can now be programmed to operate with any FM transmitter regardless of the
direction of the FM shift.
SPECIFICATIONS:
SIZE:
2.27"L X 1.00"W X 0.65"H
WEIGHT:
0.6
OZ.
DESIGN:
DUAL CONVERSION, SUPER HETERODYNE
CHANNELS:
1-8
MODULATION:
AM OR FM - BOTH PPM (PULSE POSITION MODULATION)
FREQUENCY:
R/C CHANNELS 00 THROUGH 60 - U.S. LEGAL 50, 53, 72 MHz
ULTIMATE BANDPASS: ± 8.5 KHz @ >55 dB DOWN
USABLE SENSITIVITY:
> -95 dBm
3OIP:
+12
dBm
OPERATING VOLTAGE: +3.5V TO +26V DC LIMITED ONLY BY SERVO REQUIREMENTS
LEGAL USE:
MEETS AMA GUIDELINES/FCC 1999 RADIATION REQUIREMENTS
FORTRESS
MICRO
FMA, Inc.
5716A Industry Lane
Frederick, MD 21704
Sales: (800) 343-2934 -Technical: (301) 668-7614
