microHAM MK2R Manual page 30

USB transmits data in frames with a delay between frames, Router indicates frame boundaries with three dots
(...). When a packet ends with three dots it means that the data continues in the next frame.
IMPORTANT: If MK2R is to operate when Router is not running, the settings must be saved as power-up
defaults using "Device | Store as Power-Up Settings."
Beginning with version 7.0, Router provides a unique control capability: the 2
data fork (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 stop bits) for proper operation!
Neither CAT port has priority. Polls/commands from each application are processed alternately. In order
to avoid collisions and avoid confusion due to unexpected data, responses from the radio are returned only
to the application that generated the command. Unsolicited data from the radio such as automatic
frequency/mode updates (Icom "transceive" packets or "Auto-information" data from Kenwood, Elecraft
and recent Yaesu transceivers) can be forwarded to both CAT ports individually when appropriate
"Forward autoinformation to CAT port" box is checked.
Due to physical limitation of data channel throughput and the controller capabilities in various transceivers,
there are several important rules which must be observed.
Total data to/from from both applications must not exceed maximum throughput of the CAT port or
●
the capacity of the 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
●
patiently while the other communicates with the radio.
Due to protocol deficiencies in handling VFO split commands in many transceivers (particularly
●
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: Although Router has been tested extensively using many different applications for the CAT
nd
and 2 CAT ports, microHAM cannot guarantee proper operation with every possible combination
of software.
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nd
2 CAT PORT
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nd
CAT Port is an intelligent