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APEX™ Exciter Incorporating FLO™ Technologyr
DC Power Distribution Theory of Operation
2604s400.fm
03/08/07 888-2604-001 Page: 4-17
WARNING: Disconnect primary power prior to servicing.
• +15 Volt Float leaves UDC interface board at J5 pin 2, the return is J5 pin 1.
4.5.3.3 Down Converter Board Power
The down converter board receives its dc voltages (+/- 15 Vdc and +8 Vdc) from the UDC
interface board via connector J8. The down converter board supplies are listed below.
• +15 Vdc: Input power from UDC interface board via connector J8 pin 1
• -15 Vdc: Input power from UDC interface board via connector J8 pin 3
• 8 Vdc: Input power from UDC interface board via connector J8 pin 5
• An on board regulator produces -5 Vdc from the -15 Vdc supply
• An on board regulator produces +5 Vdc from the +8 Vdc supply.
The following ia a list of entries on the down converter board status screen.
• +15 Vdc: Input power
• -15 Vdc: Input power
• +8 Vdc: Input power.
4.5.3.4 PLL Board Power
The PLL (phase lock loop) board receives its dc voltages (+/- 15 Vdc and +8 Vdc) from the
UDC interface board via connector J1, as listed below.
• +15 Vdc: Input power from UDC interface board via connector J1 pin 1
• -15 Vdc: Input power from UDC interface board via connector J1 pin 3
• 8 Vdc: Input power from UDC interface board via connector J1 pin 5
Several on board regulators are used to achieve low noise and excellent isolation between
the PLL board digital input/output circuits, 10 MHz reference oscillator, 128.9 MHz 1st
local oscillator (LO), and the 2ns local oscillator. This board contains seven on board +5
Vdc regulators, one +12 Vdc regulator, six +3.3 Vdc regulators, one +2.5 Vdc regulator,
and one +1.8Vdc regulator.
The following ia a list of entries on the PLL board status screen.
• +15 Vdc: Input power from UDC interface board via connector J1 pin 1.
• -15 Vdc: Input power from UDC interface board via connector J1pin 3.
• 8 Vdc: Input power from UDC interface board via connector J1pin 5.
- TECHNICAL MANUAL 1
- Exciter 1
- 888-2604-001 1
- Returns And Exchanges 2
- Unpacking 2
- Technical Assistance 2
- Replaceable Parts Service 2
- 2604ti.fm 5
- FIRST-AID 9
- REFERENCE 9
- Table of Contents 11
- Page: x 888-2604-001 03/08/07 12
- 2604s100TOC.fm 13
- List of Figures 17
- 2604s100LOF.fm 19
- List of Tables 21
- 1Introduction 23
- 1.3 Physical Description 24
- 2604s100.fm 25
- 1.4 Technical Overview 26
- 1.5 Specifications 26
- Specifications Introduction 27
- Introduction Specifications 28
- 2 Installation 29
- 2.3.1 AC Power 30
- 2.5.1 Feedback Requirements 31
- 2604s200.fm 33
- 2.6 Configuring the Exciter 35
- 2.7 Materials Needed 39
- Installation Materials Needed 40
- 3.1 Basic Operating Procedure 41
- 2604s300.fm 43
- 3.2.4 FLO Measure Soft Key 44
- 3.3 LCD Display Flow Chart 44
- System Setup Screen 45
- System Status Screen 45
- 3.4.1 System Status Screen 48
- 3.4.5.2.1 PLL Diagnostics 61
- 3.4.6.3 CAN Bus Status Screen 70
- 3.4.6.3.1 CAN Diagnostics 70
- 3.4.6.5 GPS Status Screen 71
- 3.5 Built In Tests 72
- 3.6.2 Exciter Setup Screen 75
- in hertz. The 76
- 3.6.2.1 Power Calibration 78
- 3.6.3 RTAC Setup Screen 78
- 3.6.3.1 Filter Type 80
- 3.6.3.2 Max Peak Stretch 80
- 3.6.3.3 RTAC Power On Mode 80
- 3.6.3.4 RTAC Off Air Mode 81
- 3.6.4 Display Setup Screen 81
- 3.6.5.2 RF Present Cutoff 83
- 3.6.7 FPGA Setup 88
- 3.6.7.1 FPGA Configure 1/5 88
- 3.6.7.2 FPGA Configure 2/5 89
- 3.6.7.3 FPGA Configure 3/5 90
- 3.6.7.4 FPGA Configure 4/5 91
- 3.6.9 Restore Defaults 95
- 3.7.5 From RTAC Setup Screen 97
- 4 Theory of Operation 99
- 4.3.1 Controller Board Theory 101
- 2604s400.fm 103
- 4.4.3 PLL Board - A4 108
- 4.4.3.1 10 MHz Reference 108
- 4.4.4 Output Amplifier 111
- 4.5 DC Power Distribution 112
- 4.5.1 Main Power Supply 112
- 4.5.2 Digital Deck Power 112
- 4.5.2.6 Front Panel Board 114
- 4.5.3 Analog Deck Power 114
- 4.5.3.4 PLL Board Power 115
- 4.5.3.6 Output Amplifier 116
- Exciter Maintenance 117
- 8439153013A.PLT 118
- 2604s500.fm 119
- 5.2 Loading Software 125
- Exciter Setup Screen? 128
- Transmitter Fails Mask Test 130
- 5.6 General Troubleshooting 132
- 5.6.1 Troubleshooting Tips 132
- 5.7 System Troubleshooting 133
- 5.8 Exciter Troubleshooting 135
- 5.8.1 Frequency Error 135
- 5.8.2 Dark Screen 135
- 5.8.3 Power Supply Voltages 136
- 5.8.6.1 Modulator Board 139
- 5.8.6.3 ADC and DAC Boards 140
- 5.8.6.4 Front Panel Board 140
- 5.8.6.5 Controller Board 140
- RBW 30 kHz 142
- SWT 30 ms 142
- VBW 30 kHz 142
- Att 25 dBRef -1 dBm 142
- 6Parts List 143
- Parts List 144
- Exciter GUI Screen Captures 145
- 2604sapa.fm 145
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