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14
Reference
Function
1
Pre-emphasis is standard part of FM audio broadcasting. It helps minimize noise in received audio.
2
VCO/PLL system generates transmitter frequency and makes sure it is stable.
3
Buffer amplifies VCO signal to 1-2W.
4
Output stage additionally amplifies signal to full 15W.
5
Output filter with power and SWR meter ensures clean signal and provides signals for the power/SWR
meter.
6
The microcontroller is a small computer which coordinates all of the functions of the transmitter.
7
LCD module makes it possible to monitor and set many of the parameters of this product.
8
Power/SWR meter selection circuitry, this is handled via software (LCD selection) in MAX.
You have to enter menu system and select whether you want to measure internal or external power/swr.
9
Output power control circuitry controls output power.
10
The microcontroller also provides control signal for a small fan which can be used to cool the unit.
MAXLINK
This is a 6-pin connector, designed for easy connectivity with stereo encoders. You can read more about
stereo encoders at the back of this document.
DIGIAMP
This is a 14-pin connector, designed for controlling RF amplifiers. You can read more about connecting
and controlling amplifiers at the back of this document.
Table 3: Description of various blocks of the MAX PRO 5000+ series block diagram
