Crown Low Power Transmitters - Crown Broadcast

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I Subcarrier Suppression FM S/N Ratio (FM noise) Complete transmitter Exciter only AM S/N Ratio RF Bandwidth RF Spurious Products 50 dB below ±75 kHz deviation Better than –60 dB Better than –70 dB Asynchronous and synchronous noise better than FCC requirements ±120 kHz, better than –35 dB ±240 kHz, better than –45 dB Better than –70 dB Operating Environment Temperature (0 o C –50 o C) Humidity (0–80% at 20 o C) Maximum Altitude (3,000 meters; 9843 feet) AC <strong>Power</strong> 100, 120, 220, or 240 volts (+10%/ –15%); 50/60 Hz FM30 FM100 FM250 115 VA 297 VA 550 VA DC <strong>Power</strong> FM30 FM100 and FM250 24–36 volts (36 volts at 3 amps required for full output power) 36–62 volts [48 volts at 5 amps (FM100) or 72 volts at 8 amps (FM250) required for full output power] 1–8 FM30/FM100/FM250 User's Manual
Note: We set voltage and ampere requirements to assist you in designing your system. Depending on your operating frequency, actual requirements for maximum voltage and current readings are 10–15% lower than stated. Regulatory Type notified for FCC parts 73 and 74 Meets FCC, DOC, and CCIR requirements Dimensions Weight FM30 FM100 FM250 13.5 x 41.9 x 44.5 cm (5.25 x 16.5 x 17.5 inches) 10.5 kg (23 lbs) 13.6 kg (30 lbs) shipping weight 11.4 kg (25 lbs) 14.5 kg (32 lbs) shipping weight 16.8 kg (37 lbs) 20.0 kg (44 lbs) shipping weight Getting Acquainted 1–9
Page 1 and 2: ® FM30/FM100/FM250 Broadcast Trans
Page 3 and 4: Contents Section 1—Getting Acquai
Page 5 and 6: Section 5—Adjustments and Tests .
Page 7 and 8: I INFORMATION Section 1—Getting A
Page 9 and 10: 1.2 Applications and Options Crown
Page 11 and 12: 1.2.5 Translator A receiver configu
Page 13: 1.3 Transmitter/Exciter Specificati
Page 17 and 18: ® Section 2—Installation This se
Page 19 and 20: 120Vac Illustration 2-1 Removing th
Page 21 and 22: 2.2.3 Battery Power Your transmitte
Page 23 and 24: 2.3.1 Modulation Compensator The Mo
Page 25 and 26: Frequency SW1 SW2 87.9 0 0 88.0 8 0
Page 27 and 28: 2.6 Audio Input Connections Attach
Page 29 and 30: SCA IN COMPOSITE IN MONITOR RIGHT L
Page 31 and 32: Pin Number Function 1 Ground 2 (no
Page 33 and 34: Section 3—Operation This section
Page 35 and 36: 3. Verify the following: a. The bot
Page 37 and 38: 3.3 Front Panel Bar-Dot Displays Ba
Page 39 and 40: 3.7 RF Output Control Set this cont
Page 41 and 42: in questo mondo, erono due forse, u
Page 43 and 44: 4.2 Audio Processor Circuit Board T
Page 45 and 46: Stereo Generator Board ® FM250 Ill
Page 47 and 48: Principles of Operation 4-7
Page 49 and 50: To get a direct reading of SWR, the
Page 51 and 52: 4.8 Voltage Regulator Circuit Board
Page 53 and 54: 4.11 RF Driver (FM100/FM250) The RF
Page 55 and 56: 4.15 Receiver Circuit Board Option
Page 57 and 58: Section 5—Adjustments and Tests T
Page 59 and 60: Using a Modulation Monitor 1. Set t
Page 61 and 62: 5.3.4 FSK Balance Control An FSK si
Page 63 and 64: 5.8 Bias Set (RF Power Amplifier) T
Page 65 and 66:
5.14 Audio Frequency Response For t
Page 67 and 68:
Section 6—Reference Drawings The
Page 70 and 71:
6.2 Board Layouts and Schematics Il
Page 72 and 73:
Illustration 6-6 Stereo Generator B
Page 74 and 75:
SEE NOTE 10 TOP SIDE COMPONENT MAP,
Page 76 and 77:
D 8169-1 Illustration 6-8 RF Meteri
Page 79 and 80:
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
Page 81 and 82:
R27 D 8167-5 Illustration 6-10 Disp
Page 84:
2 4 6 8 3 2 1 1 3 5 7 9 6 5 4 3 2 1
Page 87 and 88:
R20 R19 Illustration 6-13 Power Amp
Page 89 and 90:
Illustration 6-14 RF Output Filter
Page 92 and 93:
F 1 2 3 4 5 6 7 8 ADDED TO PWB (200
Page 96 and 97:
Section 7—Service and Support We
Page 98 and 99:
Crown Broadcast Three Year Limited
Page 100 and 101:
Factory Service Instructions To obt
Page 102 and 103:
Transmitter efficiency output RF Po
Page 104 and 105:
A B C AF ALC AM bandwidth BCD BFO B
Page 106 and 107:
A B C pre-emphasis processing recei
Page 108 and 109:
Symbols 19-kHz level adjustment 5-4
Page 110 and 111:
L labels 1-10 LEDs 3-5, 4-10 line v
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