Alignment Preparation for AN/PRR-9(XE-9)

3-6.1 Alignment Preparation for

AN/PRR-9(XE-9)

The AN/PRR-9(XE-9) can be aligned only in the ID-1189 (XE-2) /PR, using the RECEIVER ALIGNMENT adapter.

a. Installing RECEIVER ALIGNMENT Adapter.

(1) Remove the RECEIVER ALIGNMENT adapter (fig. 3-13) from the inside of the ID-1189(XE-2)/PR case cover.

(2) Guide bottom side of RECEIVER ALIGNMENT adapter (fig. 3-13) along the top of the RECEIVER ALIGNMENT

receptacle (fig. 3-14) of the ID-1189(XE-2)/PR so that power connector P11 (fig. 3-1 fits into the two-pin receptacle (fig.

)

3-12) at the top left part of the RECEIVER ALIGNMENT receptacle.

(3) Tighten the captive screw in the adapter to the RECEIVER ALIGNMENT receptacle (fig. 3-15).

(4) Loop the longer portion of the retaining strap -(fig. 3-13) underneath the RECEIVER ALIGNMENT receptacle (fig.

3-15). Firmly pull the longer portion of the remaining strap and overlap the two ends of the retaining strap on top of the

RECEIVER ALIGNMENT adapter to make as much of the pile and hook areas contact as possible. Press the pile and

hook areas together.

(5) Place receiver antenna connector P12 (fig. 3-13) into the RCVR ANT. receptacle (fig.3-12).

(6) Insert the TEST PROBE of the ID- 1189(XE-2)/PR into the top receptacle (fig. 3-14) of the RECEIVER

ALIGNMENT adapter.

(7) Insert the RCVR OUTPUT plug of the ID-1189(XE-2)/PR into the bottom receptacle (fig. 3-14) of the RECEIVER

ALIGNMENT adapter.

(8) Turn the RECEIVER ALIGNMENT adapter SQUELCH ON switch to off.

CAUTION

Never use the alignment tool to loosen retaining screws

or as a common screwdriver; this may damage the

alignment tool blade.

b. Tools. All tools necessary for removal of parts and alignment adjustment are contained in the lid of the ID-

1189(XE-2)/PR (fig. 1-1.1). The screwdriver with the wood handle is used to remove screws that retain the AN/ PRR-

9(XE-9) electronic unit assembly (TM 11-5820-549-12-1). The alignment tool has a short metal blade and a long handle

and is used for turning all adjustment screws during alignment. The alignment tool or screwdriver is removed from the

holding clips in the lid by pressing the tops of the pair of prongs toward the top of the individual prong with one hand

while sliding the tool sideways out of its clipped position.

c. Preparing AN/PRR-9(XE-9) for Alignment. Remove the AN/PRR-9(XE-9) electronic unit assembly from its case

(TM 11- 5820-549-12-1). Slide the AN/PRR-9(XE-9) electronic unit assembly, component side up, into the opening at the

left end of the RE- CEIVER ALIGNMENT adapter (fig. 3-16). Guide the battery plugs into the battery plug receptacle' (fig.

3-15) at the left end of the RECEIVER ALIGNMENT adapter. Receiver capacitors C1 (hole D), C3 (hole C), C7 (hole B)

and C15 (hole A) (fig. 3-17) are adjustable through the openings in the top of the RE- CEIVER ALIGNMENT adapter

when the receiver is properly installed in the RECEIVER ALIGNMENT adapter.

3-6.2 Alignment of Receiving Set,

Radio AN/PRR(XE-9)

NOTE

Any transmitter generating a strong signal of a like, or near like, frequency in the vicinity of the AN/PRR-9 (XE- 9) being

aligned may cause faulty alignment or cause difficulty in alignment.

a. Perform preparatory procedures given in paragraph 3-6.1.

b. Install battery (para 2-3b) and check the condition of the ID-1189(XE-2)/PR battery (para 3-3c). Replace battery if

necessary.

c. Use alignment tool to set AN/PRR-9 (XE-9) capacitors through holes B, C, and D of the

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