A07A2200S
6.1 MBA module - mother board
On the mother board it’s possible to perform the modulation width setting, of the
stereophonic coded signal levels, the automatic check gain regulation threshold, and the phase
compensation and the multiplex signal width.
The mother board receives on three connectors the VCO oscillator module (SINTD), the
stereophonic coded module and the automatic check gain module.
Adjust the trimmer RT4 of the MBA board as to have +8Vdc at R7 ends.
Inject a +6dBm signal into the rear MPX input, after the same level in the settings window has been
selected, then adjust the RT5 trimmer to read 75KHz on the measurement main page at the
modulation correspondence, by TX in MONO.
380 221 R02 Pag. 32
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