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|  MIL-D-70789A (AR)
(continued)
Command rates and messaqe response times.
TABLE IV.
MAXIMUM
MAXIMUM
RESPONSE
RESPONSE
REQUEST
TIME
MESSAGE
RATE
COMMAND
130 msec
STATUS DATA
5/sec
EXCLUSIVE ZUPT MODE
REQUEST
130
msec
STATUS DATA
5/sec
ODOMETER MODE REQUEST
130
msec
STATUS DATA
5/sec
ACCEPT GEODETIC DATA
130
msec
GEODETIC DATA
5/sec
RETURN GEODETIC DATA
130
msec
STATUS DATA
5/sec
AIR TRANSPORT MODE REQUEST
130
msec
STATUS DATA
5/sec
MARINE TRANSPORT MODE
REQUEST
130 msec
STATUS DATA
5/sec
TRANSPORT MODE COMPLETE
The commands and correct VMS responses are as follows:
Odometer Signal
(Pulses/sec)
BIT Command
Reverse
Forward
#1
#2
355 53
0
6
1
53
355
0
1
0
0
0
1
1
Normal Operating
Condition
0
0
If the correct responses are not received during VMS BIT, bit 5
of STATUS character S2 shall be set and bit 1 of BUILT-IN-TEST
DATA character D2 shall be set.
If the configuration has a pointing
3.5.5 Travel lock.
device (weapon, radar antenna, sensor pod, etc.), the DRU is
normally mounted to the pointing device. When the pointing
device is stowed for travel by physically clamping it to the
vehicle chassis, It is said to be "in travel lock". When the
pointing device is unclamped and elevated/rotated, it is said to
be "out of travel lock".
The DRU shall provide continuous measurements of vehicle
attitudes and Travel Lock Pointing Device References when the
pointing device is in travel lock-and measurements of pointing
device attitudes when the pointing device is in or out of travel
lock.
38
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