Kenwood TS-870S Semi Break-In, Full Break-In, Cw Reverse Receive, Rise/Decay Times, Communicating

6 COMMUNICATING

SEMI BREAK-IN

Semi Break-in allows you to transmit without manually switching between transmit and receive modes. When the key contacts open, the transceiver automatically waits for the time period to pass that you have selected via the DELAY control. The transceiver then returns to the receive mode.

1Select CW mode by pressing [CW/–R]. ¥ ÒCWÓ lights.

AGC AUTO

CW

2Press [VOX] to switch ON the Break-in function.

¥ÒVOXÓ and either ÒSEMIÓ or ÒFULLÓ lights depending on whether Semi or Full Break-in was last selected.

VOX SEMI AGC AUTO

CW

3If ÒFULLÓ lights, press [FULL/SEMI] to toggle to the SEMI status.

¥ ÒSEMIÓ lights.

4Send CW.

¥The transceiver switches automatically to transmit and mutes the receiver each time the key closes. After the key opens, the transceiver returns to receive mode after a delay.

■Setting Delay Time

The delay time is the length of time that the transceiver remains in transmit mode after the key is opened. This time should be set based on your keying speed and your personal preference.

While sending using Semi Break-in, adjust the DELAY control for the delay you prefer. The control has a range from 50 ms ~ 800 ms in steps of 50 ms.

Note:

◆The range and step size of the DELAY control differ depending on the operating mode selected.

◆Setting the delay time by computer overrides any setting of the DELAY control. The control then has no effect. To restore functionality to the DELAY control, turn the control. The newly selected setting becomes effective.

FULL BREAK-IN

Full Break-in returns the transceiver to the receive mode as soon as the key contacts open. ItÕs possible to hear if another station wants to interrupt, and it also allows you to hear interference that may begin after you start sending.

1Select CW mode by pressing [CW/–R].

¥ÒCWÓ lights.

2Press [VOX] to switch ON the Break-in function.

¥ÒVOXÓ and either ÒSEMIÓ or ÒFULLÓ lights depending on whether Semi or Full Break-in was last selected.

3If ÒSEMIÓ lights, press [FULL/SEMI] to toggle to the FULL status.

¥ÒFULLÓ lights.

4Send CW.

¥The transceiver switches automatically to transmit each time the key closes; however, it returns to receive mode immediately when the key opens.

Note:

◆Full Break-in cannot be used with the TL-922/922A amplifier.

◆During split-frequency Full Break-in operation, you may hear clicks depending on the transmit and receive frequency relationship.

◆The position of the DELAY control is ignored while using Full Break-in.

◆If using Full Break-in CW, the internal antenna tuner can be bypassed completely or can be in-line for both transmitting and receiving. To protect the antenna tuner relay, the tuner cannot be used only for transmitting.

CW REVERSE (RECEIVE)

This function switches receive from the default upper sideband to the lower sideband, therefore, interference that is heard may be eliminated. When your receive frequency is identical to the transmit frequency of the other station, the CW Reverse function has no effect on receive tone or your transmit frequency.

Press [CW/–R]to select CW Reverse.

¥ÒCWÓ and ÒRÓ light.

AGC AUTO

CW R

RISE/DECAY TIMES

The rise time of a CW signal is the time for the RF output to rise to its maximum power after the key is closed. This time excludes the make delay that occurs after closing the key but before the RF output actually begins to increase. You can adjust the CW rise time for the TS-870S via Menu No. 23 (CW RISE). The default is 4 ms. This adjustment also affects the decay time. The decay time excludes the short break delay from the moment when the key opens to when the RF output begins to fall.

The default setting is fine for low to moderate keying speeds and normal weighting (dot/dash ratios). The 2 ms setting is good for higher CW speeds or when operating with unusual dot/dash ratios. The available rise time selections include 2, 4, 6, and 8 ms.

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