DB ELETTRONICA TELECOMUNICAZIONI S.p.A.
PM 1000 – 1 kW FM Broadcasting Transmitter - USER’S MANUAL
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1. PM1000 FM TRANSMITTER
1.1 GENERAL DESCRIPTION
The PM1000 is a complete FM broadcasting transmitter with continuously adjustable output power,
0 to 1050W. Made with MOSFET technology, can be used as stand-alone complete transmitter or
as driver for high power amplifiers.
On the PM1000 the use of MOSFET allows:
- Higher efficiency ( ≈ 85%);
- High gain (high transconductance and low internal reactive capacitance);
- High thermal stability (negative coefficient for drain current).
The output frequency range is between 87.5 and 108 MHz. Frequency setting is made using internal
dip switches or external selectors (/C option). The minimum frequency step is 10 kHz.
The transmitter has high frequency stability, due to the use of the Digital Phase Locked Loop
system and a very low drift reference quartz.
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