14
The type B USB jack provides two virtual COM ports, referred to in this
manual as USB-PC1 and USB-PC2, that can be used for radio control
and soundcard I/O (digital version of LINE IN / LINE OUT). LINE OUT is
stereo; LINE IN is mono. Connect the cable to any USB-A jack on a host
computer or hub.
To set the baud rates for these ports, use the Serial USB-PCn: Baud
Rate menu entries. Refer to software application manuals for port
setup instructions. (Plugging in new devices, including the K4, may
alter COM port assignments.)
To use the RTS and DTR signals of the USB-PCn ports for transmit
functions (PTT, KEY, or FSK select), or to configure them for Auto-Info
frequency data output (AI), use the associated Serial USB-PCn menu
entries.
To set up these ports for soundcard receive audio, first tap the <MAIN
RX> function button, then tap <LINE OUT>. For soundcard transmit
audio setup, tap <TX>, then <LINE IN>. Also see TX button description.
A third COM port is also available for remote control/data; see
RS-232, below.
VIDEO
Connection for an external monitor. The monitor can be configured to
show only the panadapter, which may be configured differently from
the panadapter shown on the LCD. See Ext. Monitor Function and LCD
SCREEN AND TOUCH CONTROLS.
REF IN
A 10 MHz reference signal may be connected to this jack. The K4's
internal reference oscillator will lock to this signal when present. Also
see ER100 (Error Messages).
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