Axcera INNOVATOR, Instruction Manual

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UHF Analog Driver/Transmitter/Translator Table of Contents
LX Series, Rev. 3 March 2, 2005 ii
TABLE OF CONTENTS - (Continued)
SECTION PAGE
4.0.1 Exciter Switcher Control Board .................................................. 4-1
4.1 (Optional) Receiver Module (not used in a transmitter system) ................. 4-1
4.1.1 IF ALC Board ......................................................................... 4-1
4.1.2 UHF Mixer/PLL Board............................................................... 4-2
4.1.3 UHF Preamplifier Board ............................................................ 4-2
4.2 Modulator Module (may not be used in a translator system) .................... 4-3
4.2.1 Analog Modulator Board ........................................................... 4-3
4.2.1.1 Mono, Balanced Audio Input ............................................. 4-3
4.2.1.2 Stereo, Composite Audio Input ......................................... 4-3
4.2.1.3 SAP/PRO, Subcarrier Audio Input ...................................... 4-3
4.2.1.4 Audio Modulation of the 3.4 MHz VCO ................................ 4-4
4.2.1.5 Phase Lock Loop (PLL) Circuit ........................................... 4-4
4.2.1.6 Main Video Signal Path (Part 1 of 2)................................... 4-5
4.2.1.7 Delay Equalizer Circuits................................................... 4-5
4.2.1.8 Sync Tip Clamp Circuit .................................................... 4-5
4.2.1.9 Main Video Signal Path (Part 2 of 2)................................... 4-6
4.2.1.10 45.75 MHz Oven Oscillator Circuit .................................... 4-6
4.2.1.11 Visual Modulator Circuit ................................................. 4-7
4.2.1.12 Aural Modulator Circuit .................................................. 4-7
4.2.1.13 Combining the 45.75 MHz & 41.25 MHz IF Signals .............. 4-7
4.2.1.14 Voltage Requirements ................................................... 4-8
4.3 IF Processor Module......................................................................... 4-8
4.3.1 IF Processor Board.................................................................. 4-8
4.3.1.1 Modulator Selected......................................................... 4-8
4.3.1.2 External Modulated IF Selected......................................... 4-8
4.3.1.3 Main IF Signal Path (Part 1 of 3) ....................................... 4-9
4.3.1.4 Input Level Detector Circuit.............................................. 4-9
4.3.1.5 Pin-Diode Attenuator Circuit ............................................4-10
4.3.1.6 Main IF Signal Path (Part 2 of 3) ......................................4-11
4.3.1.7 Amplitude and Phase Pre-Correction Circuits.......................4-11
4.3.1.8 Main IF Signal Path (Part 3 of 3) ......................................4-12
4.3.1.9 ALC Circuit...................................................................4-12
4.3.1.10 Fault Command ..........................................................4-13
4.3.1.11 ±12 VDC needed to operate Board..................................4-13
4.4 VHF/UHF Upconverter Module ...........................................................4-14
4.4.1 Downconverter Board .............................................................4-14
4.4.2 L-Band PLL Board ..................................................................4-14
4.4.3 First Conversion Board............................................................4-14
4.4.4 Upconverter Control Board ......................................................4-15
4.5 Control Monitoring/Power Supply Module ............................................4-16
4.5.1 Power Protection Board...........................................................4-16
4.5.1.1 +12 VDC Circuits ..........................................................4-16
4.5.1.2 -12 VDC Circuits ...........................................................4-16
4.5.2 Control Board .......................................................................4-16
4.5.2.1 Schematic Page 1..........................................................4-17
4.5.2.2 Schematic Page 2..........................................................4-17
4.5.2.3 Schematic Page 3..........................................................4-18
4.5.2.4 Schematic Page 4..........................................................4-18
4.5.2.5 Schematic Page 5..........................................................4-18
4.5.3 Switch Board ........................................................................4-19
4.5.4 Switching Power Supply Assembly ............................................4-19