Nautel ND2000A-02x-xx0 Series Transmitter Manuals

Nautel ND2000A-02x-xx0 Series Transmitter Manuals

Manuals and User Guides for Nautel ND2000A-02x-xx0 Series Transmitter. We have 1 Nautel ND2000A-02x-xx0 Series Transmitter manual available for free PDF download: Technical Instructions

Nautel ND2000A-02x-xx0 Series Technical Instructions

Nautel ND2000A-02x-xx0 Series Technical Instructions (188 pages)

RADIOBEACON TRANSMITTER

Brand: Nautel | Category: Transmitter | Size: 2.71 MB

Table of Contents

Table of Contents
11
Section

21
1 General Information

21
- Introduction
  21
- Purpose and Scope of Manual
  21
- Purpose of Equipment
  21
- Factory Repair Service
  21
- Mechanical Description
  21
- Transmitter Chassis
  21
- Glossary of Terms
  22
Number Page

23
- ND2000A Radiobeacon Transmitter
  23
Number Page

24
- Technical Summary
  24
- Nautel's Identification
  26
- Glossary of Terms
  28
2 Theory of Operation

29
- General
  29
- Transmitter Description
  29
- Control/Monitor Panel
  29
- Local/Remote Control
  29
- Normal\Bypass Control
  29
- Rf Control Switch
  29
- Alarm Lamps
  30
- Battery-Alarm Lamp
  30
- RF Current-Alarm Lamp
  30
- SWR-Alarm Lamp
  30
- Standby-Alarm Lamp
  30
- Shutdown-Alarm Lamp
  30
- Select Main Tx Switching
  30
- Switched Metering
  30
- Test-Power/Mod Meter/Switch
  30
- Test Volts/Current Meter/Test Switch
  30
- Modulator (A2A1)
  31
- Power Amplifier (A2A2)
  31
- Exciter Module
  32
- VDC Regulator
  32
- Keying/Mod Switch
  32
- Power Trim
  32
- Keyer Pwb (A4A1)
  33
- Rf Oscillator Pwb (A4A3)
  34
- Crystal Oscillator
  34
- External RF Drive Input
  34
- Rf Synthesizer Pwb (A4A3)
  34
- Rf Drive Amplifier (A4A4)
  34
- Modulator Driver Pwb (A4A2)
  34
2 THEORY of OPERATION (Continued)

35
Section

35
- Line Volts Compensation/Power Trim Control
  35
- PWM Square-Wave Generator
  35
- Ramp Integrator
  35
- Linear Attenuator
  36
- Variable Pulse-Width Generator
  36
- Balanced Drive
  36
- Pulse-Width Fault Detector
  37
- RF Drive Alarm Circuit
  37
- Power On/Off Panel Assembly
  37
- Power Supply Modules
  37
- Power Supply Control Pwb (A7A1)
  37
- B- VDC to +24 VOLT DC CONVERTER PWB (A7A2)
  39
- Ac Supply Monitor (A7A3) Assembly
  39
- HARMONIC FILTER ASSEMBLY (A9) (See
  39
- Rf Current Probe (A9A1)
  39
- Fwd/Refl Power Probe (A9A2)
  40
- RF MON Switching
  40
- MONITOR PWB (A10) (See Figures SD-12 and
  40
- Test Switch Control
  40
- Relay Switching
  40
- Remote On/Off Relay
  40
- A/B Main Select
  41
- Shutdown Relay
  41
- Standby Relay
  41
- Monitor +15 Volt DC Regulator
  41
- Monitor -15 Volts DC Circuit
  41
- Mod Threshold Circuit
  41
- Carrier Threshold Circuit
  42
- Changeover Delay Circuit
  42
- Standby Circuit
  42
- Shutdown Circuit
  42
- Forward Power Cal
  43
- Audio Monitor Circuit
  43
- Speaker Control
  43
- Rf Current Circuit
  43
- Power Trim Interface Control Circuit
  44
- Reflected Power/Refl Pwr Cal Circuit
  44
- Mod% Control Circuit
  44
- AC POWER MONITOR CIRCUIT (DC Option Installed)
  44
- AC POWER MONITOR CIRCUIT (DC Option Not Installed)
  44
- Monitor Bypass Circuit
  45
- Battery Control Panel (A11) Assembly
  45
- Battery Control Pwb (A11A1)
  45
- Low Battery Voltage Monitor
  46
Section

51
4 OPERATING INSTRUCTIONS(Continued)

65
Section

65
- Swr-Alarm Indication
  65
- Remedial Action in Beacon Mode
  65
- Remedial Action in Voice and Beacon Mode
  65
- Modulation Percentage Indication
  66
- Preliminary Switch Settings
  66
- Control/Monitor Panel Controls and Indicators
  67
- Modulator/Power Amplifier Module Controls and Indicators
  69
- Exciter Module Controls and Indicators
  70
- Power On/Off Panel Controls and Indicators
  74
- Power Supply Module Controls and Indicators
  75
- Harmonic Filter Assembly Controls and Indicators
  76
- Battery Panel Controls and Indicators
  79
- Miscellaneous (Cabinet/Interface Panel) Controls and Indicators
  80
- Testing and Adjustment
  81
- General
  81
- Operating of Equipment
  81
- Test/Adjustment Procedures
  81
- Test/Adjustment Prerequisites
  82
- Transmitter Turn-On
  82
- DC Voltage Checks
  83
- B- Voltage (no Load) Check
  83
- Logic/Control DC Voltage Checks
  83
- Carrier Frequency Check
  84
- RF Oscillator Check
  84
- Rf Drive Output Level Check
  85
- Pulse Width Modulation Drive Check
  85
- Rf Carrier Check
  86
- Modulation Depth (Mcw) Check
  86
- RF Monitor
  86
- B- Voltage (Mcw) Check
  87
- RF Monitor
  87
- Modulation Depth (A3E Mode) Check
  88
- Identification Code Check
  89
- Standby '1' and Standby '2' Code Checks
  89
- Fault Thresholds/Changeover Check
  90
- Preliminary Changeover Procedures
  90
- Carrier Level Threshold Check
  90
- Modulation Depth Fault Threshold Check
  91
- Changeover/Shutdown Check
  92
- Db to Power/Voltage Conversion
  93
- Alarm Systems Check
  96
- RF Current-Alarm Check
  97
- SWR-Alarm Check
  97
- Shutdown-Alarm Check
  97
- Standby-Alarm Check
  97
- Battery-Alarm Check
  97
- Mod Drive-Alarm Check
  97
- RF Drive-Alarm Check
  98
- Low Ac Power Check
  98
- Test/Adjustment of Side B
  99
- Special Adjustment Procedures
  99
5 TESTING and ADJUSTMENT (Continued)

101
Section

101
- Reflected Power Reading
  101
- Low Ac Voltage Threshold Adjustment
  101
- Determination of Low Voltage Battery Threshold
  103
- Finalization of Low Battery Voltage Threshold Adjustment
  103
- Operational Adjustment Procedures
  104
- Operational Adjustment Pre-Requisites
  105
- Transmitter Turn-On
  105
- Carrier Level Adjustment
  105
- Test Equipment
  105
Number Page

107

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