microHAM MK2R Manual page 41

This setting is displayed in the BOTTOM picture and indicated by the third letter of the settings (ACmA). The
current operating state is indicated by a large black frame around the switching picture.
A: Computer audio is disconnected from the radio
and the microphone is connected directly to the
transceiver microphone jack. This setting allows
the operator to interrupt a DVK message.
B: Computer generated audio is routed to the
transceiver accessory input and the station
microphone is muted. This is the preferred setting
for digital mode operation (AFSK, PSK, etc.) when
the computer generates a PTT signal on a virtual
port.
C: The station microphone is connected to the
sound card microphone input and audio output
from the computer is connected to the radio's
microphone input. This setting is similar to "A" but
microphone signal first goes trough the sound card.
Even though all possible combinations can be accessed by clicking on the "Allow custom settings" box, not every
combination is practical. Router preselects the most useful settings for each mode group.
Router generally selects the proper audio configuration based on the mode, and optionally frequency, reported
by the transceiver in response to polling by the application (logger) and/or Router. If Router is not able to read
the operating mode from your radio (radio does not have computer control port or does not report usable mode
information), you can select one of four fixed "no radio" modes or one "no radio" mode with manual
(keyboard/keypad) mode selection.
Router generally selects the proper audio configuration based on the operating mode reported by the
transceiver in response to polling by the application (logger) and/or Router. Some transceivers make the
switching easy by providing a unique DIGITAL "mode." Among the rigs providing such support are nearly
all Yaesu transceivers (PKT, PKT-L, PKT-U), most newer Icom transceivers (USB_D, LSB_D, DIGITAL-1,
DIGITAL-2), and the Elecraft K3. Unfortunately, many radios fail to provide a separate digital mode or
their serial control protocol does not report the digital mode. This is true for all Kenwood and TenTec
transceivers, most older Icom transceivers. With those radios, digital operation (except for FSK) must be
done using USB or LSB.
Even though the radio may not report a DIGITAL mode, Router
can make an intelligent choice and apply the DIGITAL or VOICE
configuration for Audio and PTT based on the operating
frequency. The VOICE/DIGITAL combo box is used to select
voice or digital mode when the transceiver it tuned to the "Digital
Band" as defined in the Digital Band Map and the operating mode
is USB, LSB or FM.
Select by frequency: Router will select DIGITAL settings when
operating on a frequency inside the "Digital Mode" boundaries. These boundaries can be fully
customized in the Band Map by clicking the Digital Band Map button.
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3. Transmit by foot switch or hand mic PTT.
Audio Switching
41