RECEIVE AND TRANSMIT 4

DRTTY (FSK) operation

Connect a terminal unit as at left.

Select RTTY (or åRTTY—see bottom of page) mode with [MODE].

Select the desired FSK tone/shift frequencies and keying polarity as below.

Set the desired frequency with the main dial.

Use [(F-1)1/4] in the M4 display when critical setting is required.

Operate the connected PC or TNC (TU).

PRESETTING FOR RTTY

Tone frequency

Push [DISPLAY] for 2 sec. to select quick set mode.

Q2

 

RTTY

 

RTTY mode is selected.

S1 3 5 7 9

20 40

60dB

VFO A

PO

5

10

CH

M1 SPL A/B A=B

RTTY

RTTY mark frequency

 

is set to 2125 Hz.

Push [MENU] one or more times to select

RTTY TONE; then rotate the main dial to select

the desired tone frequency (p. 48).

Shift frequency

Push [DISPLAY] for 2 sec. to select quick set mode.

Push [MENU] one or more times to select Q3 RTTY SHIFT; then rotate the main dial to select the desired shift frequency (p. 48).

Q2 RTTY TONE

RTTY

Q3 RTTY SHIFT

2125 and 1615 Hz are available.

RTTY shift frequency is set to 170 Hz.

170/200/425 Hz are available.

RTTY keying

Push [DISPLAY] for 2 sec. to select quick set mode.

Push [MENU] one or more times to select Q4 RTTY KEYING; then rotate the main dial to select the desired keying polarity (p. 48).

RTTY

RTTY keying is set to

 

‘normal’.

 

normal: key open=mark

 

key close=space

Q4 RTTY KEYING

reverse: key open=space

 

key close=mark

DRTTY (AFSK) operation

Connect a terminal unit as at left.

Select SSB (LSB) mode with [MODE].

Generally, LSB is used on the HF bands and FM is used for the VHF band.

Select the desired FSK tone/shift frequencies and keying polarity as below.

Set the desired frequency with the main dial.

Use [(F-1)1/4] in the M4 display when critical setting is required.

Operate the connected PC or TNC (TU).

RTTY reverse mode

Received characters are occasionally garbled when the receive signal is reversed between MARK and SPACE. This reversal can be caused by incorrect TNC connections, settings, commands, etc.

To receive a reversed RTTY signal correctly, select åRTTY (RTTY reverse) mode.

Push [MODE] for 1 sec. (while RTTY is selected) to select åRTTY mode.

Check the receive signal.

PRESETTING FOR RTTY Tone frequency

Same as above.

Shift frequency

Same as above.

RTTY keying

Same as above.

 

 

Normal

 

 

Reverse

space mark

 

 

 

space mark

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

170

 

2125

 

2125

 

 

170

 

 

 

 

Hz

 

Hz

 

 

Hz

 

 

Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BFO

 

BFO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

displayed freq.

 

 

 

 

displayed freq.

36

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Icom I706MKTMG, IC-706MKIIG instruction manual Rtty FSK operation, Rtty Afsk operation, Presetting for Rtty

I706MKTMG, IC-706MKIIG specifications

The Icom IC-706MKIIG and the Icom IC-706MKTMG are two prominent transceiver models known for their compact design and versatile capabilities. These radios cater to amateur radio enthusiasts, providing a wide range of features suitable for both HF and VHF/UHF operations.

The IC-706MKIIG is a well-regarded dual-band transceiver that operates on HF frequencies from 160 meters to 10 meters and VHF/UHF from 6 meters to 70 centimeters. One of its main features is its compact footprint, making it an excellent choice for mobile operations as well as fixed installation. The transceiver provides up to 100 watts of output power on HF and 50 watts for VHF/UHF, ensuring robust performance for various amateur applications.

On the other hand, the IC-706MKTMG brings the same foundational performance but includes enhanced features aimed at improving user experience. It boasts a high-resolution LCD display with clear visibility under varying light conditions. This model offers advanced digital signal processing (DSP) technology, enhancing audio clarity and reducing noise interference. The built-in auto notch filter and noise blanker efficiently eliminate unwanted signals, allowing users to focus on their desired contacts without distraction.

Both models support multiple modes of operation, including SSB, CW, AM, and FM, which provides versatility in how users can communicate. They feature an easy-to-navigate menu system, allowing users to access settings quickly. With built-in memories and a large number of program settings, operators can customize their experience and quickly switch between configurations.

One standout feature of the IC-706 series is its built-in antenna tuner, which helps match the transceiver to various antenna types, optimizing performance and simplifying setup. The radios also include support for external control via CAT commands, accommodating advanced integration into larger station setups.

In terms of user connectivity, both transceivers come equipped with USB ports and support sound card capabilities, enabling digital modes such as PSK31 and RTTY easily. This integration enhances versatility, catering to modern digital communications alongside traditional voice modes.

Robust, reliable, and feature-rich, the Icom IC-706MKIIG and IC-706MKTMG models stand out as exemplary choices for amateur operators looking for a compact yet comprehensive transceiver solution. Their combination of technologies and characteristics continues to make them popular in the ham radio community.