SYSTEM INSTALLATION MANUAL
KTR 2280A
Page 1-1
15 May 2017
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
This manual contains information relative to the physical, mechanical, and electrical characteristics of the
Honeywell KTR 2280A MMDR. Installation and check out procedures are also included. Information relative to
the maintenance, alignment, and procurement of the replacement parts may be found in this KTR 2280A CMM,
Publication No. D201610000050. Final design of the installation and airworthiness approval is incumbent upon
the installer and their respective certification authority.
1.2 EQUIPMENT DESCRIPTION
The KTR 2280A MMDR Transceiver is a blind panel mounted integrated transceiver containing one transmitter
and six receivers. Depending on system configuration, all six receivers can be simultaneously active. The KTR
2280A will operate from a normal voltaqe of 27.5 VDC. The KTR 2280A is designed with ARINC 429 interfaces
which is intended for use in the aircraft. It is also designed with RS-422 capabilities that will be used primarily
for development and testing in the engineering lab. The KTR 2280A is controlled by other LRUs which will
send control information to the KTR 2280A through ARINC 429 data. Some outputs from the KTR 2280A are in
digital formats and sent to other LRUs through ARINC 429. Other outputs are more traditional analog outputs.
The six receivers and their modes of operation are as follows, The NAV receiver operates in one of three
modes as dynamically controlled by the system interface. These three modes are VOR, LOC, and VDB. The
GS operates in the Glideslope mode only. The ADF operates in the direction finding and AM modes. There are
three COM receivers. The first COM is a traditional AM mode receiver with either 25 or 8.33 kHz channel spac-
ing. The second AM COM receiver functions as a Guard channel receiver with either 25 or 8.33 kHz channel
spacing. The third COM receiver is capable of receiving either VDL Mode 2 (D8PSK) or VDL Mode A (MSK)
signals. The COM transmitter is capable of AM, VDL Mode 2, or VDL Mode A modes.
The KTR 2280A contains BIT equipment so that the operational health of the unit is constantly monitored. When
a critical fault is detected, the unit notifies the host system. The unit stores detected failures in non-volatile
memory for later review. The unit also has a temperature sensor and a timer so that faults can be time stamped
and temperature data can be collected and stored.
1.3 TECHNICAL CHARACTERISTICS
1.3.1 KTR 2280A Technical Characteristics
