Honeywell International Inc. DMA-37B2 Manuale Utente
Page 2005
10 Oct 2007
34-51-02
MAINTENANCE MANUAL
DMA-37B DME System
© Honeywell International Inc. Do not copy without express permission of Honeywell.
MP5A
Input
Default Scan Inhibit
Discrete input indicates default mode of
operation.
If this program pin is grounded when no tuning
If this program pin is grounded when no tuning
input is received and like-labelled words fall
below five per second, DMA-37B automatically
reverts to standby operation and invalidates its
computed range measurement.
If this program pin is open when no tuning input
If this program pin is open when no tuning input
is received and like-labelled words fall below five
per second, DMA-37B automatically reverts to
free scan operation.
MP5B
Input
Freq/Funct Data Source Select Discrete Discrete input determines which input tuning port
will be selected. Port A (MP3A & MP3B) are
used when the discrete is in the ground state.
Port B (MP3D & MP3E) are used when the
discrete is in the open state. When the DMA-37B
is installed in an aircraft in which a dedicated
control panel supplies the tuning information,
Port B must be used. When the DMA-37B is
installed in an aircraft in which a Centralized
Radio Management system supplies the tuning
information, Port A must be used as the primary
control source, and Port B as the secondary or
backup control source.
MP5C
Input
Functional Test Discrete
Discrete input that activates LRU functional test
function. Gnd/Low = activate functional test.
MP5D
Input
Indicator No. 1 Status Input
Discrete input indicates the status of indicator
No. 1. The input is open to indicate the indicator
has failed.
MP5E
Input
Indicator No. 2 Status Input
Discrete input indicates the status of indicator
No. 2. The input is open to indicate the indicator
has failed.
MP5F
---
Spare
---
MP5G ---
Spare
---
MP5H
---
Spare
---
MP5J
Input
Reserved for Maintenance Display
Reset
Resets failure reporting of DME System.
MP5K
Input
Air/Ground Logic
Discrete input is open when the aircraft is on the
ground and grounded when the aircraft is
airborne.
MP6A
---
Spare
---
MP6B
---
Spare
---
MP6C
---
Spare
---
MP6D
---
Spare
---
Table 2001. DMA-37B DME Interrogator Connector Determinants (cont)
Pin
Type
Signal Name
Function