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5. Limitations Caution!
5.1. PC Environment Limitations
Check that the ARCP-990, ARHP-990 and ARVP-10 operations use Windows XP SP3 or
later, Windows Vista SP1 or later, or Windows 7 RTM or later. Earlier versions, and other
operating systems, cannot be used. Use the operating systems described above for both
the host and remote stations.
For KNS operations, it is necessary to set and change the open broadband router port,
Windows firewall functions, and comprehensive security software. Furthermore, it is the
customer's responsibility to handle security when using this system. If you do not have
confidence in the settings, we recommended you stop using the system.
5.2. Network Environment Limitations
During KNS operations via the internet, it is necessary to set the global IP address on the
host station. For your global IP address, consult your contracted provider.
Only registered people can access the host station using their ID and password. Make
sure that the ID and password settings cannot be guessed easily by unauthorized people.
On this system, signals are exchanged via the network. Consequently, smooth operations
may be disabled compared to normal transceiver operations, as delays (during
analog/digital conversions) and data loss (which is greatly dependent on traffic) are
unavoidable. This is the principle operation of the system.
Examples are cited below.
Audio may break up, meter deflection may not be smooth, standby time may be delayed
(in particular, it is not suitable for contests or quick operations such as pile-ups). VFO
variability may not be smooth, audio may differ from the actual transceiver audio and
digital mode communications such as image communications with SSTV and AFSK,
PSK-31, etc., may be disabled, etc.
Broadband is recommended for the internet line used. As a benchmark, use a minimum of
1 Mbps. The speed of analog modems that use telephone lines will greatly reduce sound
quality, and may destabilize control, and so cannot be used.