Kenwood TS-990S Instruction Manual page 281

SYMPTOMS ENCOUNTERED IN ASSOCIATION WITH DATA COMMUNICATIONS, PC AND NETWORK
Symptom
Errors and retries are more likely to occur while
transmitting in AFSK mode.
Audio signal entered to the data
communications port cannot be transmitted.
More errors are likely to occur while receiving in
FSK mode.
There is no communication to ARCP-990 using
the COM port.
There is no communication to ARCP-990 using
the USB port.
If a PC is connected to the transceiver using
a USB cable, the larger COM port number is
assigned to a PC.
The time cannot be corrected with an NTP
server.
No date and time can be configured.
Contents Index
Common Problem
The AF signal output level from the TNC is
too high and the modulated signal will be
distorted.
The audio input sensitivity from the ACC
2 connector of the transceiver does not
match the entered signal.
The modulated signal was distorted due to
the loop interference by the high frequency
signal.
1 The antenna Standing Wave Ratio is too
high.
2 The high frequency signal is induced to
the transceiver from an antenna.
3 The audio input sensitivity of the ACC2
connector is too high, so that the high
frequency signal loops.
The transceiver is in the Transmit state with
a press of [PTT] or [SEND].
The audio level from the data
communications connector is too low.
The received audio cannot be decoded
since the audio output level from the ACC
2 connector does not match the input level
for the TNC and MCP.
Multi-path distortion and short-interval
phasing occur (it is not always best to have
the receive signal strength as the strongest
strength).
The baud rate is inappropriate.
CTS/RTS are not properly assigned in the
COM port.
No driver is installed onto a PC.
The baud rate is inappropriate.
If the KENWOOD transceiver, such as TH-
D72A/E, TS-590S, TS-990S, is connected
to the port which is different from the last
used USB port, the OS assigns the new
COM port number.
An IP address cannot be acquired.
No NTP server address has been
configured.
The NTP information cannot be transfered
from WAN.
No LAN cable is connected.
Automatic time correction is enabled.
TROUBLESHOOTING 18
What to do
Decrease the TNC output level in order
not to exceed the ALC zone.
Adjust, using Menu 7-06, the audio input
sensitivity of the ACC 2 connector not to
exceed the ALC zone,
Measure the anti-looping.
1 Retry the antenna matching.
2 Change the grounding from the
antenna, the transceiver, and the TNC.
3 Decrease, using Menu 7-05, the audio
input sensitivity of the ACC 2 connector.
Place the PKS terminal in the ACC 2
connector into the active state or press
[PF] preprogrammed as Data Send to
transmit.
Decrease the audio signal output level
of the equipment connected to the
transceiver, or increase the audio signal
input level using Menus 7-05 and 7-06.
Deselect the audio output level from the
ACC 2 connector, from Menu 7-10.
In the case of a beam antenna, you
can seek the position where the error is
unlikely to occur by changing the antenna
direction.
Be sure that the baud rate configured for
TS-990S and ARCP-990 is consistent.
Configure the pin assignment of the COM
connector in Advanced Menu 24.
Download the driver software from the
KENWOOD web site and install it onto
your PC.
Be sure that the baud rate configured for
TS-990S and ARCP-990 is consistent.
Keep connecting the KENWOOD
transceiver to a PC using a USB cable,
and delete the unnecessary COM port
number from "Device manager" of your
PC. Refer to the Web Site below.
http://www.kenwood.com/i/products/info/
amateur/vcp_e.html
Be sure that "On" is selected for DHCP.
Be sure that the DHCP server is enabled
in the broadband router and working
properly.
Enter the NTP Server address.
Open the port on the communications
devices such as a broadband router not
to shut down the port to be used for the
communication to an NTP server.
Be sure that the LAN cable is properly
connected.
Disable the automatic time correction.
Ref. Page
{page 16-20}
{page 16-20}
{page 16-20}
{page 1-11}
{page 16-20}
{page 16-20}
{page 16-10}
{page 16-25}
{page 16-10}
{page 16-10}
{page 16-12}
{page 15-3}
{page 1-9}
{page 1-9}
{page 15-4}
18-11