Manualshelf

User's Manual

ManualsBrandsElettronika ManualsElectronics300 Watt FM Broadcast Transmitter
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49
Component layout for adjustment points
Coder Section
Enable the Stereo mode from display.
Measure, and correct by means of C28 if needed, the frequency of the pilot tone (19kHz)
With modulation analyser and audio signal on the LEFT input at 2.2Vpp, verify the frequency response
from 30 to 15kHz without emphasis. Correct any deviation from the nominal range by acting on LP1 and
LP2.
Insert the JP4 jumper (50µs) and enable the emphasis from the display. Check the frequency response.
Insert the JP3 jumper (25+50µs) as well and check again the frequency response.
Check the crosstalk between the two channels and act on C36, R25 and R25 to bring it to the nominal
levels.