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Section II.  TEST FIXTURES
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TM-9-254 Gearcase Transfer M548 M548A1 (
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Figure 10-6.  Telescope Test Fixture
TM 9-254 10-6. Azimuth Test Fixture - Continued Figure 10-5.  Azimuth Test Fixture 10-7. Telescope Test Fixture. a. Description.      The   telescope   test   fixture   (fig.   10-6)   consists   of   a   machined   base   mounting,   a   projector collimator,  and  two  telescope  supports.    The  projector  collimator  is  fixed  on  one  end  of  the  base,  and  one  telescope support is fixed on the opposite end of the base.  A moveable telescope support is mounted on a machined track which can   be   adjusted   to   accommodate   different   instruments.      Various   adapters   (fig.   10-7)   are   used   with   the   fixture   to accommodate straight tube and elbow telescopes.  Setup gage blocks and locating blocks (fig. 10-8) are also provided to properly  position  the  particular  telescope  to  be  tested.    The  adapters,  setup  gage  blocks,  and  locating  blocks  are  all marked with a lettering system, and a chart is furnished to give the proper combination of accessories to be used with the specific telescopes. b. Use.    The  telescope  test  fixture  is  used  for  the  adjustment  and  inspection  of  elbow  and  straight  tube telescopes.    Some  of  the  instruments  that  are  checked  with  this  fixture  are  the  M-97  Straight  Tube  Telescope,  M-90F Telescope, and the M-16 Elbow Telescope.  This test fixture can also be used to roll test certain instruments such as the Nike Radar Telescope or the Collimating Telescope.  This is accomplished by superimposing the telescope reticle on the reticle of the projector collimator.  The telescope is then rotated 180 degrees and it should be noted how far the reticle in the telescope has moved up or down from its original position. 10-5

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