Kenwood TS-990S Operation Manual - Page 96

5 ASSISTING YOUR SMOOTH QSO SEMI BREAK-IN The transceiver does not revert to a receive state immediately after the key is released. Instead, the transceiver remains in a transmit for a configured delay time before reverting to the receive state. Semi break-in is useful to prevent the sound of reception immediately after the key is released, or to connect a linear amplifier to the transceiver. 1 Press [CW/ CW-R] to select CW mode. 2 Press [VOX/SEL] to enable the Semi Break-in. The "VOX" LED lights. 3 Manipulate the electronic keyer or paddle. The transceiver enters the transmit mode on the first keydown and doesn't revert to receive on key-up until the configured delay time has passed. 4 Rotate the DELAY control to adjust the delay time after a key-up. Rotating the DELAY control counterclockwise reduces the delay time and clockwise increases the delay time. Note: ◆◆Use Semi Break-in if the linear amplifier connected to the transceiver is not capable of Full Break-in. ADJUSTING THE SIDETONE AND PITCH FREQUENCY You can hear the tone from the speaker of the transceiver when you press down the key while in CW mode. This tone is called sidetone. You can monitor your Morse code transmission by listening to the tone. While Break-in or other transmit capabilities are disabled, you can use the tone to practice keying. In CW mode that require the direct keying of the carrier, a BFO (beat frequency oscillator) is required to convert the carrier into audible sound. The difference in frequency between the BFO and carrier is audible as a beat sound. The difference in frequency is called receive pitch. The sidetone and receive pitch are the same in frequency. You can turn the CW PITCH control to adjust the frequency of the sidetone to your preference. The adjustable frequency range is between 300 and 1100 Hz, and turning the CW PITCH control clockwise increases the frequency and counterclockwise decreases the frequency. ADJUSTING THE SIDETONE VOLUME 1 Select Group No. 1, "Audio Performance", from the Menu screen. 2 Access Menu 02, "Sidetone Volume". 3 Press [SELECT] (F4) to allow editing of the parameter box. 5-16 4 Press [-] (F4) or [+] (F5) to select "Linked with Monitor Control", "Off", or "1" to "20". 5 Press [ ] (F1). 6 Press [MENU] to exit. Note: ◆◆The sidetone volume is used to adjust the playback sound level of CW messages, and neither the sidetone level nor playback sound level can be changed with the AF control. Index Contents