GE ApexPro TT, Technical Manual

Page: 91 / 192

Troubleshooting
2001989-351A ApexPro™ 5-7
2. Once the receiver subsystem is known, check all LEDs for proper operation.
Verify their status with the
Receiver Subsystem LED status chart on page 5-13 .
3. Swap the suspected receiver with a known good receiver card. Drop-out should
go away.
If drop-out does not go away, suspect an antenna coverage problem. See Antenna
system troubleshooting on page 5-7.
Quick antenna system checks
1. Check all antennas:
a. Check to see if each antenna’s LED is illuminated.
b. If any antenna’s LED is not illuminated, make sure its power supply is
powered. Apply power to the antenna power supply if necessary.
c. Make sure all cables are properly connected.
d. Replace the power supply if necessary.
e. Replace the antenna if necessary.
2. If all antennas are okay, check the antenna amplifiers.
a. Check to see if each antenna amplifier’s LED is illuminated.
b. Make sure the amplifier is properly oriented regarding RF In and DC Out.
c. Make sure all cables are properly connected.
d. Replace any faulty unit(s).
NOTE
If an identical replacement part cannot be found, contact the ND&I
Team to ensure proper system balancing.
Antenna system troubleshooting
Perform the following steps in the listed sequence.
Refer to the ApexPro Antenna System Installation Test Instructions for test details.
1. Obtain the following test equipment and site documentation:
„
Equipment required to perform tests as listed in the ApexPro Antenna
System Installation Test Instructions
„ Floor plan with antenna placement (-101)
„
Rack Diagram (-301)
„ Splitter Board Design Document (-700)
„
Loss calc spreadsheet (-430)
„ Clinical Systems Design Tool for site
2. Verify the antenna system meets the requirements of the Out-of-Band RF Signal
Test.