Bedienungsanleitung Kenwood TS-870S (Seite 47 von 104) (Englisch)

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4 Following the instructions provided with your MCP or

RTTY equipment, enter the key sequence at your

RTTY keyboard to select the transmit mode.

• The “ON AIR” indicator lights.

•You may instead press [SEND] to manually

select transmit.

5 Adjust the CAR control so that the meter reads in the

ALC zone but doesn’t exceed the upper ALC zone

limit.

6 Begin sending data from the keyboard.

7 When finished transmitting, enter the key sequence

from the RTTY keyboard to return to receive mode.

• The “ON AIR” indicator goes out.

• If you are manually switching between transmit

and receive, press [SEND] to return to receive.

• Use Menu No. 21 (PKT.OUT) to select the

appropriate AF output level. The AF gain control

cannot be used for this adjustment.

Traditionally, the lower sideband is used for FSK

operation. Pressing [FSK/–R] reverses the transceiver

to the upper sideband.

RTTY FREQUENCIES

ERROR-CHECKING MODES (AMTOR/ PACKET/

PACTOR/ G-TOR/ CLOVER

Due to their error-handling capability and speed of

transmission, these modes are more efficient than

earlier forms of digital communication by machine. In

the case of G-TOR

, it was developed specifically to

handle the adverse conditions of communicating across

the solar system with spacecraft during their missions.

6 COMMUNICATING

On most HF bands, audio frequency shift keying

(AFSK) is used. This method of modulation uses audio

tones therefore either the LSB or USB mode should be

selected. Traditionally, LSB is used similar to RTTY with

the exception of AMTOR which is normally operated

using USB.

In some countries, the licensing authorities permit F2

operation on some frequencies in the 10 meter band.

For this type of operation, select the FM mode.

Note:

When using the SSB mode for digital operation, use a fast

AGC setting and switch OFF your Speech Processor. Also, take

advantage of the different filter bandwidths available via Menu No. 19

(PKT.FIL). Remember to set Menu No. 19 to OFF for voice operation

since the filters available are too narrow for voice.

1 Select the operating frequency.

2 Press [LSB/USB] to select upper or lower sideband

mode.

• For F2 operation, select the FM mode by

pressing [FM/AM]. Switching Menu No. 59

(FM.BOOST) to ON may lower error rates for FM

operation. The Menu No. 19 (PKT.FIL) filters for

digital operation cannot be used when the FM

mode is selected.

3 Select the ALC meter function by pressing [METER].

4 Following the instructions provided with your TNC or

MCP, enter the calibrate mode so you can generate

a mark condition.

• The “ON AIR” indicator lights.

5 Select the correct setting for Menu No. 20 (PKT.IN)

so that the meter reads in the ALC zone but doesn’t

exceed the upper ALC zone limit.

6 Exit the calibrate mode.

• The “ON AIR” indicator goes out.

7 Send commands and data.

• The transceiver will briefly transmit each time it

sends your commands and data, or when it

acknowledges transmissions from other stations.

• Use Menu No. 21 (PKT.OUT) to select the

appropriate AF output level. The AF gain control

cannot be used for this adjustment.

AMTOR

Packet

PacTOR

G-TOR

Clover

AMateur Teleprinting Over Radio

Packetized data used per AX.25 protocol

Packet Teleprinting Over Radio

Golay-coded Teleprinting Over Radio

Characteristic shape of an accurately

tuned signal as viewed on a monitor.

Meaning

Mode

IARU Region 1

(Europe/Africa)

Frequency (kHz)

U.S.A./Canada

Frequency (kHz)

1838~1842

3580~3620

7035~7045

10140~10150

14080~14099.5

18101~18109

21080~21120

24920~24929

28050~28150

1800~1840

3605~3645

(DX: 3590)

7080~7100

(DX: 7040)

10140~10150

14070~14099.5

18100~18110

21070~21100

24920~24930

28070~28150

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