# Transmitter Gain Calibration

This "wizard" automates the Transmitter Gain Calibration procedure described in the Calibration Procedures section of the K3 Owner's manual.

Transmitter Gain Calibration must be performed after a K3 kit is assembled, and may be required at other times.

The calibration is accomplished by transmitting a short signal into a dummy load at specific power levels on each band.

Transmitter Gain Calibration requires that the K3 be in TX NORMal, not TX TEST mode.

- 5 watt calibration is required for all K3s.
- 50 watt calibration is required for K3s with a KPA3 100-watt Power Amplifier.
- 1 milliwatt calibration is required for K3s with a KXV3 Transverter Interface.

### Wizard Pages

#### Welcome Page

This page introduces the procedure and lists the steps. Some steps may be dimmed to indicate that they do not apply to your K3 because a KPA3 or KXV3 option has not been installed and enabled.

#### Connect Dummy Load

The 5 and 50 watt calibrations require that a 50-ohm dummy load be attached to a rear-panel antenna connector. If your K3 has a KAT3 Antenna Tuner, the dummy load can be connected to either ANT 1 or ANT 2.

The dummy load should be capable of dissippating 50 watts for short periods if the KPA3 100 watt Power Amplifier is installed.

Calibration is stopped if the SWR reaches 2:1 at any time.

#### 5 watt Transmitter Gain Calibration

Click "Calibrate" to perform 5 watt calibration. Calibration frequencies are shown as the K3 makes a short transmission on each band. This step should complete in less than a minute.

#### 50 watt Transmitter Gain Calibration

The 50 watt calibration page is shown only if a KPA3 100-watt Power Amplifier has been installed and enabled through the K3 CONFIG:KPA3 menu selection.

The K3 CONFIG:KPA3 menu selection must be "PA nor" for 50 watt calibration.

Click "Calibrate" to perform 50 watt calibration. Calibration frequencies are shown as the K3 makes a short transmission on each band. This step should complete in less than a minute.

#### Connect Dummy Load to XVTR Out Connector

This page is shown only if a KXV3 Transverter Interface has been installed and enabled through the K3 CONFIG:KXV3 menu selection.

Milliwatt calibration is required if you plan to use the low-level RF output with a transverter or other equipment.

Milliwatt calibration requires that a 50-ohm resistor or a dummy load be attached to your K3's rear-panel XVTR OUT BNC connector. Calibration may appear to succeed without the load, but the calibration will be inaccurate.

#### 1 Milliwatt Transmitter Gain Calibration

This page is shown only if a KXV3 Transverter Interface has been installed and enabled through the K3 CONFIG:KXV3 menu selection.

After you have connected a dummy load to the XVTR OUT connector, click "Calibrate" to perform 1 milliwatt calibration. Calibration frequencies are shown as the K3 makes a short transmission on each band. This step should complete in less than a minute.

#### Calibration Summary

The summary page shows the result of each of the calibrations.