Honeywell International Inc. DMA-37B2 User Manual

Page 20

10 Oct 2007

DMA-37B DME System

© Honeywell International Inc. Do not copy without express permission of Honeywell.

(7) Front Panel Display Module, -0101, -0202, and -0303 Only

(a) The front panel display module is mounted behind the front panel and provides an 

interface to an operator through a low-power liquid crystal display (LCD) that is 

visible from the front of the DMA-37B. In addition to the LCD, the module contains 

Light Pipe back lighting, temperature compensation circuitry, and a PC board 

containing an associated LCD driver, two pushbutton switches used to enter 

functional test and to control the display menus, and a D-sub, nine-pin, RS-232 

serial type connector.

(b) The RS-232 front panel connector is used for testing the DMA-37B through a 

compatible test set or test panel.

(c) The LCD is a bit-mapped display capable of displaying alphanumeric and graphical 

symbols. Simple messages written in plain language minimize the potential for 

misunderstanding or incorrect interpretation. The LCD displays the following:
• Part Number/Software Identification
• Status
• Results of Level i BITE Tests
• Maintenance Help Pages
• Shop Maintenance Data
• Flight Fault Memory Contents
• Software Loading Status
• Capable of Customizing for Airline Unique Maintenance Messages.

(d) The memory card interface module is used to load software program data into the 

CPU or record data from the CPU. The memory card interface module supports 

Series 2 FLASH cards through the front panel Personal Computer Memory Card 

International Association (PCMCIA) slot. Intel Series 2 cards with capabilities 

ranging from 4, 10, and 20 megabytes (up to 64 megabytes, when available) are all 

supported. The FLASH card is inserted through the front panel. In one mode, data 

stored on the flash card memory module is used to update program or data memory 

in the DME Interrogator. In another mode, the flash card memory module functions 

as a data recorder for the software program stored in the CPU.

(8) Front Panel Display Module, -1101 and -1212 Only

(a) The front panel display module for the -1101 and -1212 units contain LEDs to 

indicate unit operational status and a push button to initiate self test. In addition 

there is a 25 pin D connector for a sperate tester interface.

(9) Memory Card Interface Module, -0101, -0202, and -0303 Only

(a) The memory card interface module is used to load software program data into the 

CPU or record data from the CPU. The memory card interface module supports 

Series 2 FLASH cards through the front panel Personal Computer Memory Card 

International Association (PCMCIA) slot. Intel Series 2 cards with capabilities 

ranging from 4, 10, and 20 megabytes (up to 64 megabytes, when available) are all 

supported. The FLASH card is inserted through the front panel. In one mode, data 

stored on the flash card memory module is used to update program or data memory 

in the DME Interrogator. In another mode, the flash card memory module functions 

as a data recorder for the software program stored in the CPU.