Axcera-430B FCC Type Acceptance Report Parts List/Tune-up Info
February 2004
7-1
7. PARTS LIST/TUNE-UP INFO
7.1 Parts List
The exciter, amplifier trays, and the output filter assembly can be subdivided
as follows:
Exciter:
-Video input
-Audio input
-Sync-tip clamp/modulator with SAW filter
-AM FCC identifier
-IF crystal oscillator
-Phase correctors
-Aural frequency modulated oscillator
-Automatic level control
-Linearity correctors
-Channel crystal oscillator
-Frequency multiplier
-Filter/mixer
-Filter/amplifier
-Metering circuits
-Control and protection circuits
-Power supply
VHF High Band Amplifier Trays:
-AGC control
-Phase shifter
-Filter/amplifier
-High-band driver pallet
-Overdrive protection
-High-band VHF amplifier pallet
-3-way splitter
-VHF amplifier pallets
-3-way combiner
-Power supply
Output filter assembly:
-Bandpass filter with traps
-VHF coupler
-VHF splitter/combiner assemblies
7.2 Tune-up Information
The 430B transmitter was aligned at the factory and should not require additional
alignments to achieve normal operation.
This transmitter operates using the baseband audio and video inputs or, if the (optional)
4.5-MHz composite input kit is purchased, either a single composite video + 4.5-MHz
input or separate baseband video and audio inputs.
Check that the RF output at J2 of (A9-A5) the coupler is terminated into a dummy load of
at least 500 watts. While performing the alignment, refer to the Test Data Sheet for the
transmitter and compare the final readings from the factory with the readings on each of
the trays. They should be very similar. If a reading is off by a significant amount, the
problem is likely to be in that tray.
Summary of Contents for 430B
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