Specifications

REC MIC (microphone recording level)

VU meter: this "stacked LED" display shows the audio level into the analog to

digital controller. Note, the display is active only if a sample rate is selected

and the recording mic is selected.

This control adjusts the microphone recording level for recording DVK messages in

the application (logger).

Sampling: sets the sample rate used for the REC MIC level displays.

Because of the nature of the Windows sound system, it is best to set the

sample rate to a multiple of the sample rate (or "clock rate") used by your

logging program for recording DVK messages.

TX (transmit levels)

These controls adjusts the output (transmit) levels. If the channels are active,

the green rectangle will be on. If not, click the TX Mixer button and unmute the

master Volume (Speaker) and Wave controls.

There are two (or four) sliders, the WAVE slider and MASTER slider (the Master

Volume or Speaker control).

As a starting point, set the MASTER level to about 80% and the WAVE level to

about 50%. Adjust WAVE for proper drive when using digital modes or playing

voice messages from a logging program that includes DVK capabilities. Adjust

the MASTER only if necessary to keep the WAVE control from operating at one

end of its range.

Test Signal: causes microKEYER II to output a 1500 Hz audio tone for setting

the transmit output level.

TX Mixer: this button opens the Windows Volume Control (Playback Mixer) for

the selected sound card.

Some tips from Geoff Anderson, G3NPA:

TIP: If you have achieved the correct settings for the transmit levels (with audio

compression disabled), changing from a single tone to the PSK idle should make transmit

power drop by at least 50% as observed on an RMS or average reading meter. This

change in power is correct. If you do NOT see a 50% (or more) change, you are probably

over driving the radio. Please note that some radios have inbuilt power meters which give

a PEAK reading and therefore the change in level discussed above will not be observed.

TIP: Don't fall into the trap of thinking that because the transmit signal looks good on the

waterfall that your actual signal is OK. All the waterfall is showing during transmit is the

local audio and NOT the transmitted signal.