1261B User Manual
Racal Instruments
Ó
1995
Configuring The 1261B 2-9
assembly using bracket kit hardware. Leave loose for final
adjustment. Install #10-32 retaining nuts (Item 9) into rack
bracket slots - 8 places.
5. Measure distance “c” (inches) between rear of rack mount
ear and front of the mainframe. Measure distance “r”
(inches) from front of front rack mounting rail to rack slide
bracket mounting surface in the rack.
6. Firmly secure front slide bracket to slide at distance
d
from
front of slide where
d = c + 1
7/8
- r
. (Note:
d
may be a
negative number in which case bracket is mounted behind
leading edge of slide).
7. Hold the front end of the slide mount assembly behind the
front “mounting” rail of the rack, while the second person
holds the rear end of the assembly.
8. Lightly secure the front slide bracket to the front mounting rail
using two Phillips Panhead #10-32 x ½ screw (Item 17).
Place the front slide bracket firmly against the mounting rail
before seating these screws.
9. Adjust the length of the rear slide bracket so it touches the
inside of the rear mounting rail. Tighten the rear bracket-to-
slide assembly screws.
10. Lightly secure the rear slide bracket to the rear mounting rail
using two Phillips Panhead #10-32 x ½ screws (Item 17).
Place the rear slide bracket firmly against the mounting rail
before seating these screws.
11. Install the other slide mounting assembly in the same
manner.
12. Set the front dimension between the two slide mount
assemblies at 16-13/16 inches (+1/16,-0) and firmly secure
the front brackets to the mounting rail.
13. The distance between the two slide mount assemblies at the
rear bracket should also be set at 16-13/16 inches (+1/16,-0).
Should a filler-plate be required to secure the slide mount
assembly to the rear rack mounting rail at 16 -13/16 inches
(+1/16,-0), use the dimensions given in
Figure
2-6
to
determine filler-plate size. The rear rack-bracket may require
adjustment to accommodate the thickness of filler-plate.
14. Firmly secure the rear rack bracket to the rear rack mounting
rail (or filler-plate) using two Phillips Panhead #10-32 x ½
screws in each bracket (Item 17).
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