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tape recorder with ability to record and play back MMS
video as well as any CDS page and associated
symbology. • MARK function is lost in MMS search
mode.
a. AVTR Description. The AVTR consists of a
video tape recorder and the CDS interface for system • Functions of the AVTR command keys will
control and operation. Power is provided by 28 Vdc be boxed when that command is selected.
essential bus and circuit protection is provided by
VIDEO RCDR circuit breaker located on the auxiliary
circuit breaker panel. Power is supplied to the AVTR 2. ZOOM key Press to select zoom.
when power is applied to the aircraft.
NOTE
b. AVTR Controls and Functions. The system is
controlled by MFD line address keys, by pushing circuit
breakers in, and monitored through CDS interface. The • VTR TAPE FULL will display to indicate
signal provided by the CDS and MMS video is then end of tape when RECORD function is
recorded and played back as selected by the aircrew. selected.
Refer to fig. 4-19 through 4-21 for controls and functions. Refer to table 4-2 for variations in operation • CASSETTE NOT LOADED will display
between the THOMPSON TRT and PRECISION ECHO opposite RECORD key when video
AVTR. cassette has not been loaded in AVTR.
c. AVTR Operation. The AVTR records and plays • Functions of the AVTR command keys will
be boxed when that command is selected.
back MMS video or any CDS display. AVTR control
legends are displayed in any MMS operation mode
except when declutter is pressed or NAV offset on 3. RECORD key Press to record MMS video
target locate functions are selected. or MFD pages. RECORDING displays
opposite key.
NOTE
4. VTR CONTROL PAGE key Press to select
AVTR Control page. VTR CONTROL PAGE
• (CDS2) If ISP fails, the AVTR is not displays.
operational.
• If L MCPU fails, the AVTR is not 5. fFuFn ckteioyn. Press to select AVTR fast forward
operational.
• AVTR can only record and playback 6. STOP key Press to stop AVTR recording
images on the CPGs MFD. event.
• The AVTR keys are still active when 2X
zoom is selected even though legends 7. PLAYBACK key Press to review last
with those keys are not displayed. recorded AVTR event.
• Pressing any mode select key (VSD, 8. GO TO MARK Press to position tape to
HSD, etc.) will return to 1X. preselected mark.
• TEMP ORID will replace ZOOM/AUTO
CUE legend, if LASER HOT displays, to 9. REWIND key Press to select AVTR rewind
allow aircrew to override automatic function.
shutdown of laser. ZOOM legend will
display again once TEMP ORID i s 10. COUNTER RESET key Press to reset
activated. AVTR counter to zero.
4-40
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
1. ZOOM/TEMP ORIDE key (CDS2) ISP/ L MCPU function. (Not available with IMSP
installed.)
2. PPT key MMS function.
3. RECORD key Activates AVTR record functions.
4. VTR CONTROL PAGE key Selects AVTR Control page.
5. DCLTR key MMS function.
6. W HOT/B HOT key MMS function.
7. (CDS2) FREEZE/ VIXL LIST MMS function.
key
8. MARK key Used to mark stored location on tape.
9. Laser code status key MMS function.
Figure 4-19. MMS Page With AVTR Controls
4-41
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
1. ZOOM/TEMP ORIDE key (CDS2) ISP/ L MCPU function. If laser overheats, ZOOM is
replaced with TEMP ORIDE. (Not available with IMSP installed.)
2. STOP key Stops AVTR fast forward, rewind, and record functions.
3. RECORD key Activates AVTR record functions.
4. PLAYBACK key Activates AVTR playback function.
5. DCLTR key MMS function.
6. GO TO MARK key Advances AVTR to marked position.
7. REWIND key Selects AVTR rewind function.
8. COUNTER RESET key Resets AVTR tape counter.
9. MARK key Used to mark stored location on tape.
10. FF key Activates AVTR fast forward function.
Figure 4-20. AVTR Control Page
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TM 1-1520-248-10
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2
4
5 3
6
7
8
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CONTROL/INDICATOR FUNCTION
1. STOP key Stops AVTR fast forward, rewind, and record functions.
2. Tape Counter key Boxed numerals indicate current tape count.
3. PLAYBACK key Activates AVTR playback function.
4. DCLTR key CDS function.
5. REWIND key Selects AVTR rewind function.
6. FREEZE key Activates AVTR frame freeze function.
7. MARK key Used to mark stored location on tape.
8. FF key Selects AVTR fast forward function.
Figure 4-21. AVTR Control Page In Playback Mode
4-43
TM 1-1520-248-10
4. Access INITIAL PAGE 2.
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(103)
