Specifications

SMARTUNER MANUAL 48
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© Nov2000 SGC, Inc. P.O. Box 3526, 98009 Fax: [phone] Tel: [phone]
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Reset
Pushing the red reset button allows the coupler to be reset.
This is preferable to the other method of turning the input
power off and on.
9.2 Smartlock Notes
The Tune Lock function is in most cases unneeded. Inadvertent retuning is a rare
occurrence. Retuning may occur when the environment or antenna system has changed.
In this case, retuning is within normal operation of the coupler. However, the function
is still provided with the SMARTUNER to be used if desired.
10.0 Receiving Antenna Systems
10.1 Receiving Antenna Systems
Traditionally, receiving systems used transistors and transformers as a means of
matching the antenna impedance to the radio (See Figure 10.1.1.) This is called an
Active Receiving Antenna.
Receiver
Antenna
Figure 10.1.1
When a SMARTUNER is used, the impedance matching is done more directly, giving
greater selectivity to the operator. This system is called an Active Tuned Receiving
Antenna (See Figure 10.1.2.) The advantage here is that more of the actual signal energy
reaches the receiver allowing for a greater SNR to be achieved.