User's Manual Part 1

8 of 285
Air Circulation ................................................................... 251
Proximity of Transceiver to Antenna ................................. 251
Power Supply ................................................................................... 252
Voltage Drop .................................................................... 252
Protection Fuse ................................................................ 252
Antenna ............................................................................................ 253
PRC-2090 Tactical HF Transcevier and Docking Station (2090-05-00) ............................... 254
Front View - 2090 Not Fitted .......................................................................................... 254
Front View - 2090 Docked .............................................................................................. 254
Steps for Docking the PRC-2090 Transceiver into the Docking Station ..................... 255
Removable Display Vehicle Mounting Bracket Assembly (2090-05-04) ..................... 258
PRC-2090 Docking Station – Rear Panel ...................................................................... 263
PRC-2090 Docking Station – Rear Panel Connector Pin Outs .......................... 264
ESU/CW Socket ............................................................................... 264
ATU Connector ................................................................................. 265
Antenna RF Connector ..................................................................... 265
Linear Amplifier Interface Socket ...................................................... 266
Auxiliary Socket ................................................................................ 267
Power Connector .............................................................................. 268
2019 Automatic Tuning Mobile HF Antenna - Barrett P/N 2019-00-10 ............. 269
2019 Antenna to PRC-2090 Docking Station Connection Diagram ... 269
Mounting the Barrett 2019 Automatic Tuning Mobile HF Antenna ..... 270
Antenna Assembly ........................................................................... 273
Mounting the Base Spring ................................................. 273
Mounting the Whip Sections ............................................. 274
Testing the Barrett 2019 Automatic Tuning Mobile HF Antenna ........ 275
910 Automatic Tuning Mobile Antenna ............................................................. 276
Overview of HF Operation ..................................................................................................... 280
HF Propagation .............................................................................................................. 280
Radio Wave Propagation Illustrated ............................................................................. 281
Day .................................................................................................................. 281
Night ................................................................................................................ 282
Factors Which Affect HF/SSB Communications .......................................................... 282
Frequency Selection......................................................................................... 282
Time of Day ...................................................................................................... 283
Weather Conditions .......................................................................................... 283
Man-made Electrical Interference ..................................................................... 283
System Configuration and Installation .............................................................. 283
Special Note - HF Communications Compared with VHF or UHF Short Distance
Communications ............................................................................................................ 283
Limited 3 Year Warranty ........................................................................................................ 284
Warranty Registration and Customer Support ............................................................. 285