7 BASIC COMMUNICATIONS

AM TRANSMISSION

Each mode used on the HF Amateur bands has its own advantages. Although long distance DX contacts may be less common while using AM, the superior audio quality characteristic of AM operation is one reason why some hams prefer this mode.

When looking for others operating on AM, check the following frequencies first:

3885 kHz, 7290 kHz, 14286 kHz, 21390 kHz, and

29000 ~ 29200 kHz

If necessary, refer to “OPERATING BASICS”, beginning on page 18, for details on how to receive.

1Select an operating frequency.

2Press [FM/ AM/ NAR] to select AM mode.

• “AM” appears.

NARROW BANDWIDTH FOR FM

When operating in FM mode, you can select wide or narrow bandwidth operation. The table below shows the RX IF filter bandwidth and TX deviation combination for each operating mode. The bandwidth selection is crucial to avoid audio distortion or insufficient intelligibility that the other station will encounter.

Mode

RX IF Filter

TX Deviation

 

 

 

FM

Wide

Wide

 

 

 

FMN

Narrow 1

Narrow

1K-type: Main transceiver only.

All E-types: Main transceiver and sub-receiver.

1Press [FM/ AM/ NAR] to select FM mode.

2Press [FUNC], [FM/ AM/ NAR] to toggle the selection between Wide and Narrow.

•“FM” or “FMN” appears to indicate which bandwidth is selected.

3Press [MIC/ CAR] to activate the Microphone Gain Adjust.

•The current gain level appears.

4Press [SEND], or press and hold Mic [PTT].

•The MAIN band LED lights red.

•Refer to “VOX” {page 39} for information on automatic TX/RX switching.

5Speak into the microphone and adjust the MULTI/ CH control so that the calibrated power meter slightly reflects your voice level.

•Speak in your normal tone and level of voice. Speaking too close to the microphone or too loudly may increase distortion and reduce intelligibility at the receiving end.

•You may want to use the Speech Processor. Refer to “SPEECH PROCESSOR” {page 40} for details.

6Press [SEND] or release Mic [PTT] to return to receive mode.

•The MAIN band LED lights green or turns off, depending on the MAIN SQL setting.

7Press [MIC/ CAR] to quit the Microphone Gain Adjust.

Refer to “COMMUNICATING AIDS”, beginning on page 37, for information on additional useful operation functions.

Note: If necessary, adjust the carrier level before speaking into the microphone. Press [FUNC], [MIC/ CAR] to enter the adjustment mode. While transmitting only carrier signals, turn the MULTI/ CH control so that the ALC meter just begins to indicate. Press [FUNC], [MIC/ CAR] again to complete the adjustment.

NARROW BANDWIDTH FOR AM

When receiving AM on the main transceiver, you can further decrease the bandwidth to eliminate interference. However, the TX deviation of AM is not affected by this selection.

1Press [FM/ AM/ NAR] to select AM mode on the main transceiver.

2Press [FUNC], [FM/ AM/ NAR] to toggle the selection between Normal and Narrow.

•“AM” or “AMN” appears to indicate which IF bandwidth is selected for the main transceiver.

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