If the CAT cable is plugged into the transceiver's serial port (RS-232 or TTL), select the INTERFACE and
COMMAND SET according to Table 5-1 | Transceiver interface type and command set selection. The baud rate
has to be set to the same value as the transceiver's. The byte spacing and polling time may be left
unchanged.
The different transceiver brands and models have a great variety of controls and settings of their CAT
interfaces. For maximum flexibility and clarity, they are divided into several groups (SETs). In order to select
the COMMAND SET and protocol parameters (BAUD RATE, BYTE SPACING, and POLLING TIME) suitable for
the transceiver being used, see Table 5-1 | Transceiver interface type and command set selection.
The BAUD RATE specifies the data transfer rate in number of bits per second (communication speed with
the transceiver). This parameter is valid only for serial (RS-232 or TTL) CAT interface. The selection should
match the baud rate selected in the respective transceiver's menu.
The BYTE SPACING introduces a pause with a specified duration (in microseconds) between the bytes
within a message sent to the transceiver. This parameter is valid only for serial (RS-232 or TTL) CAT
interface. The default byte spacing duration is zero (0 µs). The parameter should be increased only if
communication problems appear with the transceiver.
The POLLING TIME specifies how often (in milliseconds) the amplifier checks the transceiver for a new
frequency (the pause between messages sent to the transceiver). This parameter is valid only for serial (RS-
232 or TTL) CAT interface. Default duration is 500 ms. Its concerns the re-tune time of the amplifier. If too
short time is selected communication could suffer with some transceivers.
Table 5-1 | Transceiver interface type and command set selection
YAESU FT(FTDX)-101, 10, 450, 950, 991, 1200, 2000, 3000, 5000, 9000,
and similar
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