== Enabling an External Device like an Antenna Tuner or Amplifier to Track the Primary Transceiver's Frequency via Commander's Secondary CAT Port ==

You can configure Commander's Secondary CAT port to provide continuous frequency updates to an external device that expects to be connected to your transceiver's CAT interface so that it can passively monitor the transceiver's frequency. If you [[ControlMultipleRadios|switch among multiple primary transceivers]], this approach will enable the device to track the current primary transceiver's frequency.

In the '''Secondary CAT Serial Port''' panel on the '''Config''' window's '''Ports''' tab,

  1. set the '''CAT protocol''' selector to specify a protocol the device can monitor; given a choice, ''Kenwood'' is recommended

  1. set the '''Port#''' selector to the '''COM''' port to which the device is attached 

  1. set the '''Baud''' selector to the device's baud rate

  1. set the '''Word''' selector to the device's word length (usually ''8'')

  1. set the '''Parity''' selector to to the device's parity (usually ''None'')

  1. set the '''Stop''' selector to to the device's stop bits (''1'' for most devices)

  1. set the '''DTR''' selector to '''Off'''

  1. set the '''RTS''' selector to '''Off'''

  1. click the '''Follow Primary''' button

  1. check the '''Update every 200 ms''' box

  1. check the '''Enable''' box

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[[ControlElecraftKAT500ViaSecondaryCATPort|Enabling an Elecraft KAT500 Antenna Tuner to Track the Primary Transceiver's Frequency via Commander's Secondary CAT Port]]

[[ControlElecraftKPA500ViaSecondaryCATPort|Enabling an Elecraft KPA500 Amplifier to Track the Primary Transceiver's Frequency via Commander's Secondary CAT Port]]

[[ControlElecraftKPA500KAT500ViaSecondaryCATPort|Enabling an Elecraft KPA500 Amplifier and an Elecraft KAT500 Antenna Tuner to Track the Primary Transceiver's Frequency via Commander's Secondary CAT Port]]

[[TransceiverControl|Transceiver Control]]

[[GettingStarted|Getting Started with DXLab]]