Controlling an Icom PW1 Amplifier

The Icom PW1 Amplifier can automatically track the frequency of an Icom transceiver if

During an initial programming step, the PW1 learns the transceiver's CI-V address. From then on, the PW1 monitors the CI-V bus for new frequency messages emitted by the transceiver when it QSYs (emitted because the tranceiver's CI-V Transceive setting is enabled), and adjusts its frequency accordingly. If 10 seconds elapse without the PW1 receiving a new frequency message, the PW1 begins sending report frequency directives to the transceiver via the CI-V bus.

With no other devices connected to the CI-V bus, this arrangement enables the PW1 to 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 results in collisions between PC-initiated CI-V commands and the transceiver's responses to the PW1's report frequency commands. Unfortunately, the PW1 lacks the logic required to detect and reject CI-V messages damaged by collisions; as a result, the PW1 fails to accurately track the transceiver's frequency.

Commander's Secondary CAT Port can be configured to interact with a PW1 connected to a private CI-V bus, enabling the PW1 to track the primary transceiver's frequency without collision damage. This configuration allows the PW1 to track the frequency of any transceiver that Commander can control, not just Icom transceivers.

If your transceiver is an Icom, you must establish this connectivity:


If your transceiver is not an Icom, you must establish this connectivity:


Recent Icom transceivers like the IC-7700 and IC-7800 can be directly connected to an RS-232 cable without need of a CI-V interface; the IC-7200 and IC-7600 can be directly connected to one of a PC's USB ports, creating a virtual serial port that eliminates the need for a physical serial port, RS-232 cable, and CI-V interface. The CI-V interfaces required by older Icom tranceivers and by the PW1 can be [:ConnectingIcom: acquired or assembled]. Some non-Icom transceivers cannot be directly connected to an RS-232 cable, requiring a [:TransceiverConnection: level conversion interface].

You must also connect the appropriate signals from your transceiver to the PW1's ACC-1 connector, whose pins are described on page 4 of the PW1 Instruction Manual. If you will be using a non-Icom transceiver, augment the ALC and SEND connections shown in the Using a non-Icom exciter diagram at the bottom of page 8 with GND and 13.8 V connections to the PW1's ACC-1 connector (pins 2 and 7 respectively).

With the physical connectivity established as shown above,

  1. If your transceiver is an Icom, use its menu system to disable its CI-V Tranceive setting

  2. Power off your PW1
  3. Configure Commander to control your [:TranceiverControlAlinco:Alinco], [:TranceiverControlElecraft:Elecraft], [:TransceiverControlFlexradio:FlexRadio], [:TranceiverControlIcom:Icom], [:TranceiverControlKachina:Kachina], [:TranceiverControlKenwood:Kenwood], [:TranceiverControlTenTec:TenTec], or [:TranceiverControlYaesu:Yaesu] transceiver via Commander's Primary CAT Port

  4. Verify that Commander can track and control your transceiver's frequency and mode
  5. Configure Commander's Secondary CAT Serial Port panel, which can be found on its Configuration window's Ports tab

    1. click the Follow and Lead Primary button

    2. set the CAT protocol selector to PW1

    3. check the Train box

    4. set the CI-V Address to 74

    5. set the Port# Selector to COM Y (the serial port to which your PW1's CI-V interface is connected)

    6. set the Baud selector to 9600

    7. set the Word selector to 8

    8. set the Parity selector to None

    9. set the Stop selector to 1

    10. set the DTR and RTS selectors to Off (unless one or both are used to provide power to your PW1's CI-V interface, in which case they should be set to On)

  6. While simultaneously pushing your PW-1's UP, and DOWN buttons, push its POWER button; this will

    • power-up the PW1
    • clear any previously-learned CI-V address
  7. While pushing your PW1's INPUT button, push its POWER button; this will place your PW1 in programming mode; the INPUT 1 light will begin blinking

  8. On the Ports tab of Commander's Configuration window, un-check the Secondary CAT Serial Port panel's Train box

  9. Slowly QSY your transceiver until the PW1's INPUT 1 light stops flashing, indicating that PW-1 programming is complete

  10. Push your PW1's POWER button to record the programming results and power off your PW1

  11. Push your PW1's POWER button to power on your PW1, which will from now on track your transceiver's frequency

[:TransceiverControl:Transceiver Control]

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