Technical information

Table of Contents
Specifications ………………………………………….. 5
1.0 Supplied Items ……………………………………… 6
2.0 Mechanical Design …………………………………. 6
2.1 Marine Mounting …………………………………… 6
2.2 Desert and High Temperature Installations ………… 6
2.3 Direct Weather Protection Installations ……………. 7
3.0 Coupler Configuration……...……………………….. 7
3.1 Connections to SG-239……………………………… 7
3.2 Tuning Process …………………………………….. 8
3.3 Impedance Detector…………………………………. 8
3.4 VSWR Detector…………………………………….. 9
3.5 Phase Detector ……………………………………… 9
3.6 Central Processing Unit (CPU) …………………….. 9
3.7 Initialization…………………………………………. 10
3.8 Jumper Settings…………………………………….. 10
4.0 Tuning Process and Options ……………………….. 11
4.1 Program Description ……………………………….. 11
4.2 Tuning Paths ……………………………………….. 13
4.2.1 Antenna Too Short ……………………………….. 13
4.2.2 Antenna Too Long ……………………………….. 14
4.2.3 JP1—Tuning Elements Out During Receive……… 14
4.2.4 JP3—Tune From Memory ……………………….. 15
5.0 B.I.T.E. Status LED Descriptions……………………15
6.0 Optional SmartLock ……………………………….. 16
6.1 Tune, Tune Lock, and Reset ……………………….. 17
6.2 SmartLock Notes …………………………………… 17
7.0 SG-239 Enhanced Features…………………………. 18
8.0 Do-It-Yourself Light Bulb Dummy Load………….. 20
9.0 Five Golden Rules of HF Installation ………………. 22
10.0 S t a n d a rd Warranty …………………………….. 24
11.0 Component Location………………………………. 25
12.0 Schematics………………..……………………….. 26
13.0 Smartuner™ Comparison Charts………………….. 34
This manual is produced as a guideline for the SG-239 antenna coupler. Perform-
ance and results may vary and SGC does not warrant any installation or any result.
This manual is subject to change without notice.
SG-239 Manual
page 3
Wednesday, October 17, 2001 08:31
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