QRP Labs QCX 5W CW Manuals

Manuals and User Guides for QRP Labs QCX 5W CW. We have 1 QRP Labs QCX 5W CW manual available for free PDF download: Assembly Instructions Manual

QRP Labs QCX 5W CW Assembly Instructions Manual

QRP Labs QCX 5W CW Assembly Instructions Manual (138 pages)

Transceiver kit

Brand: QRP Labs | Category: Transceiver | Size: 8.44 MB

Table of Contents

Table of Contents
2
1 Introduction

5
2 Parts List

6
3 Assembly

7
4 Operating Instructions

67
- Overview of Features
  67
- Display Elements
  69
- Operator Controls
  70
- Tune Rate
  70
- Keyer Speed
  71
- Rit
  71
- VFO Mode
  72
- VFO A/B Frequency Swap
  72
- Frequency Presets
  72
- Automated Message Transmission Mode
  73
- Menu System
  73
- Saving Current Operating Parameters (VFO Frequency Etc)
  74
- Types of Configuration Menu Item
  75
- Editing a Configuration Menu Parameter
  75
- Editing a LIST Parameter
  75
- Editing a BOOLEAN Parameter
  75
- Editing a NUMBER Parameter
  76
- Editing a TEXT Parameter
  76
- Frequency Presets Menu
  78
- Messages Menu
  78
- VFO Menu
  79
- Keyer Menu
  81
- Decoder Menu
  85
- Beacon Menu
  87
- Other Menu
  94
- Alignment Menu
  96
- Test Equipment
  100
5 Circuit Design

104
- Block Diagram and Summary
  104
- Circuit Diagram
  106
- Synthesised Oscillator
  106
- Transmit/Receive Switch
  107
- Band Pass, Phase Splitter, QSD and Pre-Amps
  108
- 90-Degree Audio Phase Shift
  109
- CW Filter
  110
- Audio Amplifier
  110
- Transmit Signal Routing and PA Driver
  112
- Class-E Power Amplifier
  112
- Low Pass Filter
  114
- Key-Shaping Circuit
  114
- Microcontroller
  116
- Optional GPS Interface
  119
- In Circuit Programming (ISP) Interface
  120
- Test Equipment
  120
- Voltage Regulator
  123
6 Fault-Finding

123
- Blank LCD or Blocked LCD
  123
- No Backlight at All
  123
- A Row of Blocks Appears on the Top Row
  124
- DC Voltage Readings
  124
- RF Power Output Check
  126
- Audible Continuous Clicking Noise During Receive
  127
7 Measurements

127
- Equipment
  128
- Transceiver Current Consumption
  128
- Transmitter Power Output
  129
- Class-E Power Amplifier Drain Waveform
  130
- RF Envelope Key-Shaping
  130
- Low Pass Transmitter Harmonic Output Filter Characteristics
  131
- Band Pass Receiver Input Filter Characteristics
  131
- Quadrature Sampling Detector Bandwidth
  134
- CW Filter Response
  135
- Unwanted Sideband Rejection
  136
8 Operation Reference "Cheat Sheet

137
9 Resources

138
10 Document Revision History

138

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