DB ELETTRONICA TELECOMUNICAZIONI S.p.A.
PM 1000 – 1 kW FM Broadcasting Transmitter - USER’S MANUAL
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2. TECHNICAL SPECIFICATIONS
RF SPECIFICATIONS
Operating frequency range .......................................................................................... 87.5 to 108 MHz
Operating frequency setting ................................ synthesised with internal dip switches, 10 kHz step
..................................................................................... synthesised by front panel switches (/C option)
Output impedance .......................................................................................................................... 50 Ω
Output connector ................................................................................................................................. N
Output power...................................................................................................................... 0 to 1050 W
Power tolerance ........................................................................................................................... ± 1 dB
Harmonics ................................................................................................................................. ≤-68 dB
Spurious .................................................................................................................................... ≤-80 dB
Syncro AM modulation ............................................................................................................. ≤-55 dB
Asyncro AM modulation .......................................................................................................... ≤-60 dB
Frequency stability
Thermal drift (0 to 50 °C) ....................................................................................................... ± 250 Hz
Aging drift ..................................................................................................................... ± 300 Hz / year
MODULATION
Mono operation
Input level -6 to +10 dBm
Input connector ............................................................................................................... XLR balanced
Input impedance ........................................................................................................................... 600 Ω
Bandwidth (± 0.25 dB) ................................................................................................. 20 Hz to 15 kHz
Attenuation of frequencies ≥ 19 kHz ......................................................................................... ≥50 dB
Preemphasis .......................................................................................................................... 50/75 μsec
S/N ratio (± 75 kHz peak dev. with 1 kHz input, 50μs de-emphasised) .................................... ≥75 dB
THD+N (± 75 kHz peak dev. with 1 kHz input, unweighted) ..................................................... ≤0.1%
Stereo operation (with stereo coder included in /S model)
L & R input level ............................................................................................................ -6 to +10 dBm
Input connectors .............................................................................................................. XLR balanced
Input impedance .......................................................................................................................... 600 Ω
Bandwidth (± 0.25 dB) ................................................................................................. 20 Hz to 15 kHz
Attenuation of frequencies ≥ 19 kHz ......................................................................................... ≥50 dB
Preemphasis .......................................................................................................................... 50/75 μsec
S/N ratio (± 75 kHz peak dev. with 1 kHz input, 50μs de-emphasised) .................................... ≥70 dB
THD+N (± 75 kHz peak dev. with 1 kHz input, unweighted) ..................................................... ≤0.1%
Stereo separation ........................................................................................................................ ≥60 dB
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