Crown FM250G, Руководство пользователя

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Rev A
v
5.11 RF Bandwidth and RF Harmonics ............................................................... 5–7
5.12 Pilot Frequency ........................................................................................... 5–7
5.13 Audio Frequency Response ........................................................................ 5–7
5.14 Audio Distortion.......................................................................................... 5–7
5.15 Modulation Percentage ............................................................................... 5–7
5.16 FM and AM Noise ....................................................................................... 5–7
5.17 Stereo Separation ....................................................................................... 5–8
5.18 Crosstalk..................................................................................................... 5–8
5.18.1 Main Channel Into Sub ........................................................................... 5–8
5.18.2 Sub Channel Into Main ........................................................................... 5–8
5.19 38–kHz Subcarrier Suppression ................................................................. 5–8
5.20 Additional Checks ....................................................................................... 5–8
Section 6—Reference Drawings
6.1 Views .......................................................................................................... 6–2
6.2 Board Layouts and Schematics .................................................................. 6–4
Audio Processor ......................................................................................... 6–5
Stereo Generator ........................................................................................ 6–7
RF Exciter ................................................................................................... 6–9
Metering ................................................................................................... 6–11
Motherboard............................................................................................. 6–13
Display...................................................................................................... 6–15
Voltage Regulator ..................................................................................... 6–17
Power Regulator ....................................................................................... 6–19
RF Output Amplifier .................................................................................. 6–21
Quadrature Power Combiner .................................................................... 6–22
RF Input.................................................................................................... 6–23
DC Input ................................................................................................... 6–24
RF Output Filter and Reflectometer........................................................... 6–26
FM Predriver ............................................................................................. 6–28
Chassis Wiring.......................................................................................... 6–29
Receiver Board ......................................................................................... 6–31
Section 7—Service and Support
7.1 Service........................................................................................................ 7–2
7.2 24–Hour Support........................................................................................ 7–2
7.3 Spare Parts ................................................................................................. 7–2