Audio Switching Tab - microHAM microKEYER Manual

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Table Of Contents

Table of Contents

microKEYER allows customizing the audio configuration to meet the needs of a specific logging program or

operating style (VOX, foot switch, computer generated transmit/receive switching, etc.) for each operating

mode. Router recognizes four operating modes for the radio: CW, VOICE, DIGITAL and FSK. There are

separate configurations for routing audio among the microphone, sound card and transceiver inputs for

CW, Voice and FSK/DIGITAL. The microphone can be switched to either the sound card microphone input

or the microphone input of the transceiver. Output from the sound card can be switched to the transceiver

microphone jack (VOICE modes) or to the transceiver rear panel audio input (FSK and DIGITAL modes).

There are three audio configurations (settings):

setting A: disconnects the computer generated audio and connects the microphone directly to the

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transceiver microphone input.

setting B: routes the audio generated by computer to the transceiver rear panel audio input (Packet,

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Auxiliary, or Accessory depending on manufacturer). This audio routing is used for digital mode

operation. Since the PKT or AUX input of most radios bypasses the radio's internal microphone

preamp and other audio processing stages which can distort digital modulation from the sound card,

setting B is recommended for digital mode operation. In setting B, the microphone should be muted

to avoid "hot mic" issues.

setting C: routes the computer generated audio to the transceiver microphone input. This audio

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routing is used for VOICE modes and DVK operation.

Router allows configuring the Audio Switching based on the three sources of transmit control (VOX or

software command, Serial port or WinKey PTT, and foot switch or hand mic PTT). Each PTT source can

select a different audio configuration:

1. The transceiver is switched to transmit by VOX or serial (CAT) command from logger.

This setting is displayed in the TOP picture and indicated by the first letter in settings scheme (ABC). The

current operating state is indicated by a large black frame around the switching scheme picture.

A: Computer audio is disconnected from the radio

and the station microphone is connected

directly to the transceiver front panel

microphone jack. This setting is for those who

prefer VOX operation in SSB.

B: Computer generated audio is routed to the

transceiver rear panel and the station

microphone is muted. This is the preferred

setting for digital mode operation (AFSK, PSK,

etc.) when the computer generates a PTT

keying signal on a virtual port.

C: Audio from the computer is routed to the

transceiver microphone input and the station

microphone is connected to the sound card

mic input. This setting is basically same as A

but the microphone signal goes through the

sound card.