Array Solutions Bandmaster III Manual - Page 9

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3.2.1 ICOM CI-V

To make an ICOM CI-V connection to the Bandmaster III, simply connect a cable with 1/8"

phone plugs on each end to the Remote jack on the radio and the CI-V jack on the decoder.

When the Bandmaster III is connected to an ICOM radio via a CI-V connection it can replace the

ICOM CT-17 since the Bandmaster III contains all the required interface circuitry. The

Bandmaster III then monitors all CI-V data from the radio for frequency or band changes and

selects the appropriate band. The Bandmaster III can be used autonomously without any

computer attached to the radio. In this case, the radio still sends out commands indicating the

frequency whenever you turn the VFO knob or change bands.

3.2.2 RS-232 connections

Manufacturers using direct RS232c DB9 connections can be attached to the Bandmaster via the

J5 connector and a specially designed cable.

3.2.3 TTL connections

Some older radios, such as FT840 and FT890, use TTL signal levels (0-5V) instead of the

standard bipolar RS-232 voltages. Both types of interfaces are supported by the Bandmaster III.

Note: The pin out of the connector at the radio end may vary, check your radio reference manual

Revision 1.5 November 21, 2011

for proper hook up.

Bandmaster III J5 pin out

Pin 2

Send Data

Pin 3

Receive Data

Pin 5

CTS (Optional)

Pin 7

Ground

Table 2: RS232 cable configuration for Radio connector

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