4 RECEIVE AND TRANSMIT

■Packet operation

DConnections for packet

DATA IN

wGND

q

PTTP e

r DATA OUT

y SQ

tAF OUT

DATA

TX AUDIO

GND

TNC SIDE

RX AUDIO

SQL

PTT

RS-232C

Rear panel

TU or TNC

 

Personal computer

DData socket

qw

e r

ty

PIN #/NAME

DESCRIPTION

qDATA IN Communication data input.

w

GND

Ground for DATA IN, DATA OUT and AF OUT.

e

PTTP

Transmits when grounded.

rDATA OUT Outputs 9600 bps receive data.

tAF OUT Outputs 1200 bps receive data.

Rear panel view

y SQ

Squelch output.

Goes to ground when squelch opens.

DAdjusting the transmit signal output from the TNC

 

☞ NOTE: For packet operation the transceiver can

1. When using a level meter or synchroscope, adjust

 

be set to one of two data speeds: 1200 bps or

the TX audio level (DATA IN level) from the TNC as

 

9600 bps. Data speed is set in initial set mode

follows.

 

(see p. 54 item 29 9600 MODE).

0.4 Vp-p (0.2 Vrms): recommended level

 

Data speed is set in initial set mode (see p. 53 item

0.2 Vp-p–0.5 Vp-p (0.1 Vrms–0.25 Vrms):

 

acceptable level

 

29 9600 MODE).When setting data transmission

 

 

 

speed to 9600 bps, the DATA signal coming from the

2. When not using a measuring device.

 

TNC is applied exclusively to the internal limiter cir-

➀Connect the IC-706MKIIG to a TNC.

 

cuitry to automatically maintain bandwidth.

➁Enter a test mode (“CAL”, etc.) on the TNC, then

 

NEVER apply data levels from the TNC of over 0.6

transmit some test data.

 

Vp-p, otherwise the transceiver will not be able to

➂When the transceiver fails to transmit test data or

 

maintain the band width and may possibly interfere

transmits sporadically (TX indicator doesn’t appear

 

with other stations.

or flashes):

 

☞ NOTE: Read the instructions supplied with your

Decrease the TNC output level until the transmit

 

indicator lights continuously.

 

TNC carefully before attempting packet operation

 

When transmission is not successful even though

 

with the IC-706MKIIG.

 

the TX indictor lights continuously:

 

 

 

 

Increase the TNC output level.

37

 

 

 

 

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Image 40
Icom IC-706MKIIG Packet operation, Connections for packet, Data socket, Adjusting the transmit signal output from the TNC
Page 39 Page 41

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.
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