7 SPECIALIZED COMMUNICATING

AMTOR/ PACKET/ PACTOR/ G-TORTM/ CLOVER

6 Exit the calibrate mode.

 

Due to their error-handling capability and speed of

 

• “TX” disappears and “RX” appears.

transmission, these modes are more efficient than

7 Use Menu No. 34 to select the appropriate AF output

earlier forms of digital communication by machine. In

 

level.

 

 

 

the case of G-TORTM, it was developed specifically to

 

 

 

 

 

• The AF control cannot be used for this

handle the adverse conditions of communicating across

 

the solar system with spacecraft during their missions.

 

adjustment.

 

 

 

 

 

8 Send commands and data.

 

Mode

Meaning

 

 

• The transceiver will briefly transmit each time it

 

 

 

 

 

 

sends your commands and data, or when it

AMTOR

AMateur Teleprinting Over Radio

 

acknowledges transmissions from other stations.

Packet

Packetized data used per AX.25 protocol

The data rates and types of modulation used for HF

PacTOR

Packet Teleprinting Over Radio

Packet operation are shown below.

 

G-TORTM

Golay-coded Teleprinting Over Radio

 

Mode

 

Data Rate

Modulation Type

Clover

Characteristic shape of an accurately

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tuned signal as viewed on a monitor.

 

USB & LSB

 

300 bps

F1

 

 

 

 

(AFSK)

 

 

 

 

 

 

On most HF bands, audio frequency shift keying

 

USB & LSB

 

1200 bps

F1

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

 

 

 

(PSK)

 

 

 

 

tones therefore either the LSB or USB mode should be

 

FM

 

1200 bps

F2

selected. Traditionally, LSB is used similar to RTTY with

 

 

 

 

(AFSK)

the exception of AMTOR which is normally operated

 

 

 

 

 

 

 

 

 

 

using USB.

 

Note: In some countries, F2 modulation at 1200 bps may be used

In some countries, the licensing authorities permit F2

on the 10-meter band. Consult your national Amateur radio

organization to obtain band plans that specify where in each band

operation on some frequencies in the 10 meter band.

various modes are used.

 

 

 

For this type of operation, select the FM mode.

 

PACKET FREQUENCIES

Consult “MCP AND TNC” {page 62} under

 

 

 

 

 

IARU Region 1

 

U.S.A./Canada

“CONNECTING PERIPHERAL EQUIPMENT” if you

 

(Europe/Africa)

 

need installation information.

 

Frequency (kHz)

 

Frequency (kHz)

Note:

 

 

 

 

1800~1830

For digital operation using the SSB or FM mode, switch the

 

 

 

 

 

 

 

 

 

 

 

 

3590~3600

 

 

Speech Processor OFF. When using the SSB mode, also select

 

 

3620~3635

a fast AGC setting.

 

 

 

 

 

 

 

Digital band

 

7080~7100

When selecting one of the filters (not OFF) in Menu No. 32, do

 

 

not activate the RX Equalizer via Menu No. 50; the default for

 

 

 

 

 

 

 

Digital band

 

10140~10150

Menu No. 50 is OFF.

 

 

Set Menu No. 32 to OFF for voice operation since the filters

 

 

 

 

 

 

 

14089~14099, 14101~14112

 

14095~14099.5

available are too narrow for voice.

 

 

 

 

 

 

 

 

1 Select the appropriate filter bandwidth via Menu

 

Digital band

 

18105~18110

No. 32.

 

 

21100~21120

 

21090~21100

• The default is OFF.

 

 

 

 

 

 

 

Digital band

 

 

 

 

 

2 Select the operating frequency.

 

 

 

 

 

 

 

28120~28150, 29200~29300

 

28120~28189

 

 

 

 

3 Press [LSB/USB] to select LSB or USB.

 

 

 

 

 

 

 

 

 

50600~50780

• For F2 operation, select FM by pressing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[FM/AM].

AMTOR activity can be found on or near 14075 and

• If you selected one of the filters in step 1 (not

3637.5 kHz. These would also be good starting places

 

 

 

 

 

 

OFF), “FSK” appears with “LSB”, “USB”, or “FM”.

when searching for PacTOR, G-TORTM, or Clover

stations.

4 Following the instructions provided with your TNC or

 

MCP, enter the calibrate mode so you can generate

 

a mark condition.

 

• “RX” disappears and “TX” appears.

 

5 Use Menu No. 33 to select the appropriate AF input

 

level.

 

• Select a low input level so long as the ALC meter

 

reflects.

 

1

2

3

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5

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8

9

10

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14

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Image 33
Kenwood TS-570D, TS-570S, TS-570S, TS-570D Mode Meaning, Mode Data Rate, Packet Frequencies, Europe/Africa, Fm/Am