This page may be used to view the status of your KXPA100 and operate it remotely.
The top half of this page shows the amplifier status.
The bottom half of the Operate page shows the state of the optional KXAT100 Antenna Tuner.
Chooses one of the two antenna connectors. The KXPA100 selects the antenna most recently used on band change, in all Modes.
Shows the setting of the ATU bypass relay.
If the antenna is well matched to the transmitter, a "full search tune" may find that Bypass is the appropriate tuner setting.
Note: when bypassed, firmware releases all capacitor relays, all inductor relays and the SIDE relay to reduce power consumption. When the bypass relay is changed to "not bypassed", the last used L, C, and SIDE relay settings are restored.
The KXAT100 uses a bank of capacitors and a bank of inductors arranged in a switched L network. The capacitors may switched to shunt either the transmitter or the antenna side of the series inductor. Generally the capacitor should shunt the higher of the transmitter or antenna impedances. The KXPA100 determines the appropriate setting during TUNE. This relay is released when the ATU is Bypassed.
Eight capacitors, ranging from 10 to 1360 picoFarads, may be used in any combination. Normally the KXAT100 selects capacitors during a tune operation. You may "manually" select one or more of the check boxes to choose individual capacitors. You may also type the desired total capacitance in picoFarads into the text box. The KXPA Utility chooses the capacitors that result in the highest available capacitance that does not exceed your requested capacitance when you "leave" the text box by pressing the TAB key or click another area with the mouse. You may position the mouse cursor over the up or down arrow at the right edge of the text box and left click to "nudge" the capacitance up or down. Hold the left mouse button while over the up or down arrows to rapidly "spin" through the available values.
Note: when bypassed, firmware releases all capacitor relays, all inductor relays and the SIDE relay to reduce power consumption. When the bypass relay is changed to "not bypassed", the last used L, C, and SIDE relay settings are restored.
The KXAT100 has eight inductors, ranging from 50 nanoHenry (.05 μH) to 9000 nH (9 μH). See the section above on capacitors; the inductor group works the same way.
Note: when bypassed, firmware releases all capacitor relays, all inductor relays and the SIDE relay to reduce power consumption. When the bypass relay is changed to "not bypassed", the last used L, C, and SIDE relay settings are restored.
Click the KXPA Utility Tune button or press the KXPA100 front panel TUNE button to start a tune. Click the KXPA Utility Tune button or press the KXPA100 TUNE button again to interrupt tuning.
The values under the TUNE button are firmware state numbers, used in development. They show the antenna tuner state and step count. Whenever the KX3 is polling the KXPA100 for status, "Xcvr Poll" is displayed.