JR R921X, Руководство пользователя

Страница: 4 / 12

JR R921X Receiver User Guide
The R921X high-performance, DSMX™ 2.4GHz 9-channel receiver is intended for use
in a wide variety of applications, ranging from sophisticated sport to ultimate performance
projects. With Spektrum MultiLink DSMX technology, the R921X employs two internal and
up to two external receivers for path diversity—ensuring that your receiver always “sees” a
strong signal. In addition, Combined with the superior data capacity, interference resistance,
and frequency shifting of DSMX technology, the R921X instills confidence in the most
challenging RF environments. The JR R921X allows the use of an optional Flight Log
Data Recorder (JRPA145). The Flight Log plugs into the data port and provides quality
of RF link data of the previous flight, allowing the confirmation of the operational
performance of the systems.
Features
9 channels •
2 internal receivers •
1 or 2 (optional) remote receiver(s) •
Patented MultiLink™ technology •
Two types of fail-safe—SmartSafe™ and Preprogrammed fail-safe •
Flight Log compatible •
Specifications
Number of channels
—9
Modulation
—DSM2, DSMX
Band
—2.400 to 2.4835GHz
Dimensions (WxLxH)
—.35in x 2.06in x 0.55in
Weight
—Main 15 g/.6 oz in Remote 3 g/.2 oz each
Current
—70mA
Voltage range
—3.5 to 9.6V
Installing the R921X Receiver
The R921X incorporates dual internal receivers and one or two remote receivers, offering the
security of up to four simultaneous RF links for the ultimate in multi-path RF security. Two
internal receivers are located on the main PC board, while a third remote receiver must be
plugged into one of the antenna ports in order for the system to operate. Optionally, a second
remote receiver can be plugged into the remaining remote antenna port giving a total of
four operational receivers. By locating these receivers in different locations throughout the
aircraft, each receiver is exposed to its own RF environment, greatly improving path diversity
(the ability of the receiver to see the signal in all conditions).
Note : The R921X requires that at least one remote receiver be used.
Install the main receiver using the same method you would use to install a conventional
receiver in your aircraft. Typically wrap the main receiver in protective foam and fasten it
in place using rubber bands or hook and loops straps. Alternately, in electric models or in
jets (low vibration), it’s acceptable to use thick double-sided foam tape to fasten the main
receiver in place.
Mounting the remote receiver(s) in a different location(s) from the primary receiver gives
tremendous improvements in path diversity. Essentially each receiver sees a different RF