SGC Smartuner SG-231 Technical Information download pdf (Page 10)

5.1.1 COUPLER TUNE CAPABILITY

An external automatic antenna coupler can be automatically tuned

in SSB by momentarily depressing the "PBT" push button and

then pressing the push button on the microphone within 5 seconds.

This will insert the CW tone to allow the coupler to tune. The

SG-2020 will transmit a tone as long as the microphone push but-

ton is depressed. Once you release the push button on the micro-

phone, the radio reverts to SSB with no tone and normal transmis-

sion can resume.

Note: Once ‘"PBT"’ has been depressed and released, you must

key the microphone with-in 5 seconds or the function will time

out. You may also escape this function by depressing any other

key, or by moving the main adjustment knob.

5.2 CW MODE

The SG-2020 is designed for CW use with many special features.

To choose the CW mode, press and hold the "BW" button, and

momentarily press the REV button until “CW” appears on the dis-

p l a y. Continue to hold the "BW" button while turning the main

tuning control knob to adjust the bandwidth for the desired filter

setting. Narrowing the bandwidth filter will allow clear reception

of CW signals in crowded bands. The bandwidth can be adjusted

down to a very narrow 100 Hz, however, 300 Hz should be ade-

quate for clear CW reception. CW transmit can be accomplished

with paddle, keyer, or push button (PTT) on the microphone.

The SG-2020 is set to transmit at 650 Hz upper sideband tone.

Setting the dial frequency for the same receive and transmit fre-

quency (Push Button "XCVE") will transmit a tone frequency of

650 Hz above the carrier frequency (upper sideband).

CW for optimum performance:

1. Set volume to maximum

2. Set RF gain for comfortable level

3. Reduce bandwidth to 600 Hz approximately

4. If interfering signals are present, use the past band tuning

to reduce interference

5. If further rejection is required, reduce bandwidth again to

as low as 100 Hz

SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA

P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259 7331

E-mail: [email protected] Web site: http://www.sgcworld.com

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SGC Smartuner SG-231 Technical Information Page 10