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ci-490 

 

 

 

 

 

   

Page 4 of 4 

 

 

                

             

REV 000

 

a

 2002 STI-CO INDUSTRIES, INC., 11 Cobham Drive, Orchard Park, NY 14127-4187   

Technical Support: E-mail: [email protected] Phone: 1-716-662-2680 Fax: 1-800-685-1122 

Made in U.S.A.

 

 

B.  Antenna Mounting Procedure 

1.  Remove “one way clips” on the inside roof panel near the window and set aside. 

2.  Remove OEM antenna connection for the AM/FM radio and allow the cable to hang. 

Note:  Some 

applications do not have existing OEM antennas.  In that case a ¾” hole is required.  

 

3.  Using an adjustable wrench, remove the OEM antenna. 

4.  Position the disguised antenna mount into the mounting hole from the top of the vehicle.  Note: This step 

may requires an assistant to hold and align the new antenna.  

5.  Connect the transmission line matching network to the antenna’s cable (pigtail) and connect the 

extension cable to the end of the matching network.  Trim the excess cable extension.  

Note: Do NOT 

overtighten the SMA connectors.

 

6.  Install the GLMT-AMFM antenna near the top center of the rear window. This will allow access to the 

+12VDC power feed in the vehicle roof and attachment of the AM-FM antenna lead to the vehicle 
harness AM/FM feed to the car radio. 

7.  Attach the +12vdc power lead from the GLMT-AMFM antenna to the +12vdc power lead, disconnected 

or unplugged, from the vehicle wiring harness, at the beginning of the installation, with the electrical 
splice connector supplied with the unit. 

8.  Attach the ground lead from the AM/FM antenna to any appropriate grounding location. 

9.  Choose the appropriate Glass mount AM/FM antenna lead adapter cable assembly for the vehicle 

harness and connect it to the AM/FM antenna connection removed from the OEM antenna at the 
beginning of the installation.  

10.  Conceal excess cabling under the headliner. 

11.  Test both antennas before re-installing the vehicle’s trim.  (See below)   

 

Note:

 Take care not to tear the sheath of the cable when pulling through sharp body panels. If a hole appears in 

the cable’s sheath, cover with several layers of a high quality electrical tape.  

TESTING: 

 

Installation testing, if required, must take place at the transmitter side of the feedline.  This will ensure that the 
cable connectors and cables have the proper continuity. Make sure all doors; hood, and trunk are closed. 

 

A.  Reflective Power:

 A measurement of reflective power using a wattmeter, you can expect up to 11% 

reflected power.  When results are greater than 11%, recheck the grounding. 

B.  SWR:

 A measurement of SWR (standing wave ratio) will yield better than 2:1.  If greater than 2:1, 

recheck the grounding. 

 

Note:

 

Some vehicles are sensitive to VHF frequencies.  STI-CO suggests that you isolate the 

transmission line and check for unwanted interference with the ignition switch on.   

 

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