QRP Labs QCX-mini CW Manuals

QRP Labs QCX-mini CW Manuals

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

QRP Labs QCX-mini CW Assembly Instructions Manual

QRP Labs QCX-mini CW Assembly Instructions Manual (121 pages)

Brand: QRP Labs | Category: Transceiver | Size: 12.25 MB

Table of Contents

Table of Contents
2
Introduction
4
- Parts List
  5
Assembly - General Guidelines
10
- Inventory Parts
  22
Wind and Install Transformer T1
23
Block Diagram and Summary
83
- Circuit Diagram
  83
- Synthesized Oscillator
  86
- Transmit/Receive Switch
  87
- Band Pass, Phase Splitter, QSD and Pre-Amps
  88
- 90-Degree Audio Phase Shift
  89
- CW Filter
  90
- Audio Amplifier
  90
- Transmit Signal Routing and PA Driver
  92
- Class-E Power Amplifier
  93
- Low Pass Filter
  94
Key-Shaping Circuit
95
- Microcontroller
  96
- Optional GPS Interface
  102
- In Circuit Programming (ISP) Interface
  103
- Test Equipment
  103
- Voltage Regulator
  105
- Fault-Finding
  106
Blank LCD or Blocked LCD
106
- No Back-Light at All
  106
- A Row of Blocks Appears on the Top Row
  106
- DC Voltage Readings
  106
- RF Power Output Check
  109
- Measurements
  111
- Equipment
  111
- Transceiver Current Consumption
  111
- Transmitter Power Output
  112
- Class-E Power Amplifier Drain Waveform
  113
RF Envelope Key-Shaping
113
Low Pass Transmitter Harmonic Output Filter Characteristics
114
Band Pass Receiver Input Filter Characteristics
114
Quadrature Sampling Detector Bandwidth
117
CW Filter Response
118
Unwanted Sideband Rejection
119
Operation Reference "Cheat Sheet
120
Resources
121
Document Revision History
121

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