microHAM DigiKeyer Manual page 19

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Beginning with version 7.0, Router provides unique control capability: the 2

(software 'Y' connector) that allows a second application to share control of the radio. Router monitors when

data is sent from each application and routes the radio's responses to the correct virtual port.

IMPORTANT: Both applications must use same communication parameters (baud rate, data length, parity and

number of stopbits) for proper operation!

Neither CAT port has priority. Polls/commands from the application are processed alternately. In order to avoid

collisions and confusion due to unexpected data, responses from the radio are returned only to the application

that generated the command. Unsolicited data such as automatic frequency/mode updates (Icom "transceive"

packets or "Auto-information" data from Kenwood, Elecraft and recent Yaesu transceivers) is forwarded to both

CAT ports.

Due to physical limitation of data channel throughput and the controller capabilities in various transceivers,

there are several important rules which must be observed.

Combined data from both applications must not exceed maximum throughput of the radio control port

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and transceiver controller. In other words, the polling rate from one application may need to be

decreased to provide data space for the second application and vice versa.

Applications must be tolerant of delayed responses from the radio. Each application must wait for the

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radio to respond when the another application is communicating with the radio.

Due to protocol deficiencies in handling VFO split commands with many transceivers (particularly

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Icom), split mode must be initiated and ended by only one application and manual split control (from the

front panel of the radio) should not be used.

NOTE: Despite extensive testing using various combinations of applications for the CAT and 2

ports, microHAM cannot guarantee proper operation with every potential combination of applications.

CAT PORT

CAT Port is an intelligent data fork

CAT

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