Crown Low Power Transmitters - Crown Broadcast

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Transmitter efficiency output RF Power Output-FM 100 PADC Volts PADC Amps RF Power Efficiency 31.2 5.72 110 61 29.6 5.35 100 63 26.4 4.55 79.4 66 23.5 3.90 63.1 68 21.1 3.40 50.1 69 19.0 2.97 39.8 70 17.1 2.63 31.6 70 15.4 2.35 25.1 69 13.9 2.10 20.0 68 12.5 1.90 15.8 66 11.2 1.74 12.6 64 10.1 1.62 10.0 59 9.1 1.52 7.9 57 Power measurements were made at 97.1 MHz. Return loss on the attenuators was greater than 30. RF Power Output-FM 250 PADC Volts PADC Amps RF Power Efficiency 45.6 7.14 275 84 43.6 6.85 250 83.7 41.4 6.53 225 60 39.0 6.19 200 60 36.5 5.88 175 62 33.8 5.53 150 64 31.0 5.02 125 74 27.7 4.69 100 65 24.0 4.32 75 64 19.4 3.84 50 65 13.5 3.26 25 70 Power measurements were made at 97.1 MHz . Voltage and current measurements were taken from the unit’s built-in metering. The accuracy of the internal metering is better than 2%. Return loss of the RF load was greater than –34 dB at test frequency. Appendix–2 FM30/FM100/FM250 User's Manual
A B C Glossary The following pages define terms and abbreviations used throughout this manual. Glossary G–1
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® FM30/FM100/FM250 Broadcast Trans
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Contents Section 1—Getting Acquai
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Section 5—Adjustments and Tests .
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I INFORMATION Section 1—Getting A
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1.2 Applications and Options Crown
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1.2.5 Translator A receiver configu
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1.3 Transmitter/Exciter Specificati
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Note: We set voltage and ampere req
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® Section 2—Installation This se
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120Vac Illustration 2-1 Removing th
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2.2.3 Battery Power Your transmitte
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2.3.1 Modulation Compensator The Mo
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Frequency SW1 SW2 87.9 0 0 88.0 8 0
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2.6 Audio Input Connections Attach
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SCA IN COMPOSITE IN MONITOR RIGHT L
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Pin Number Function 1 Ground 2 (no
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Section 3—Operation This section
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3. Verify the following: a. The bot
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3.3 Front Panel Bar-Dot Displays Ba
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3.7 RF Output Control Set this cont
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in questo mondo, erono due forse, u
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4.2 Audio Processor Circuit Board T
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Stereo Generator Board ® FM250 Ill
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Principles of Operation 4-7
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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 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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