User Manual

PINEAPPLE TECHNOLOGY, INC. VII – ROUTINE MAINTENANCE
DTXPRO-1.2KU OPERATING AND SERVICE MANUAL
THE INFORMATION PROVIDED HEREIN IS PINEAPPLE TECHNOLOGY INCORPORATED PROPRIETARY INFORMATION
AND CANNOT BE COPIED OR DISTRIBUTED WITHOUT PRIOR AUTHORIZATION
VII - 2
VII --- ROUTINE MAINTENANCE
The following KEY MAINTENANCE AND PERFORMANCE CHECKS should be made monthly
or more frequently in some environments where dust and rodents are problems. Pineapple
Technology, Inc. recommends that the station provide a data log book to maintain these
records.
DANGER: SOME OF THE RECOMMENDED TESTS REQUIRE THAT THE TRANSMITTER
BE OPERATING IN NORMAL MODE. THIS PROCEDURE MUST BE PERFORMED BY A
BROADCAST ENGINEER. MORE THAN ONE PERSON SHOULD BE PRESENT IN CASE
OF AN ACCIDENT REQUIRING ASSISTANCE. COMMUNICATIONS TO EMERGENCY
SERVICES SHOULD BE AVAILABLE.
TRANSMITTER
• This is an integrated 1.2 KW digital transmitter and is built around three (3) PA1K-50
amplifier assemblies located in two (2) MFA2PA-50 mainframes.
• Record the transmitter forward and reflected power. These readings should be
compared to previous readings to insure normal operation.
• Using the ADP500 record currents for each power LDMOS device in the transmitter.
• Carefully inspect RF Output coaxial cables for excessive heating or discoloration.
• Check DC Power connections on shunt panels and power supplies for over-heating
which could indicate the hardware needs attention.
• Check DC Connections on the PA rear panel.
• Remove and clean the air filters located on the front panel of each MFA2PA-50
mainframe assembly. It is safe to remove the filter while the transmitter is operating.
The filters may be cleaned with a light detergent and dried completely before re-
installing. Spare filters are available from Pineapple Technology, Inc. Request Part
Number P/N 990199 when ordering.
FACILITIES
.
• Clean all air inlet filters and exhaust outlets to ensure that the transmitter is getting
clean unobstructed airflow.
• Perform recommended service on air condition systems.
• Rodent traps or baits should be renewed to keep the facilities clear of these pests
which can cause damage to the transmitter.