Controlling an Icom PW-1 Amplifier
The Icom PW-1 Amplifier can automatically track the frequency of an Icom transceiver if
- The PW-1 and transceiver are connected to the same CI-V bus
The transceiver's CI-V Transceive setting is enabled
During an initial programming step, the PW-1 learns the transceiver's CI-V address. From then on, the PW-1 monitors the CI-V bus for new frequencymessages emitted by the transceiver when it QSYs with its CI-V Transceive setting enabled, and adjusts its frequency accordingly. If 10 seconds elapse without a "new frequency" message, the PW-1 begins sending the transceiver "report frequency" directives via the CI-V bus.
With no other devices connected to the CI-V bus, this arrangement enables the PW-1 to accurately track the transceiver's frequency. However, if the user wishes to run a PC-hosted transceiver control application to support logging, digital mode operations, DX spot collection, etc., the required connection of a PC-controlled CI-V interface to this CI-V bus generates collisions between PC-initiated CI-V commands and the transceiver's responses to the PW-1's "report frequency" commands. Unfortunately, the PW-1 lacks the logic required to detect and reject CI-V messages damaged by collision; the result is that the PW-1 fails to accurately track the transceiver's frequency.
Commander's Secondary CAT Port can be configured to interact with a PW-1 connected to a private CI-V bus, enabling the PW-1 to accurately track the primary transceiver's frequency. This configuration allows the PW-1 to accurately track the frequency of any primary transceiver, not just Icom transceivers.
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