Switching The Reference Signal; Switching The Ctcss Mute Operation; Configuring The Sql Control Signal; Configuring The Logic Of Psq - Kenwood TS-890S Instruction Manual

16 OTHER FUNCTIONS

Switching the Reference Signal

External frequency input (10 MHz) from the REF IN connector on
the rear panel can be used as the reference frequency of this
transceiver. The input impedance is 50 Ω.
• Inputting a reference signal with a high degree of accuracy from an
external source to this transceiver and using it as the reference
frequency helps to enhance the frequency accuracy of this transceiver.
• The standard input level is 0 dBm ±10 dB.
Configure in Advanced Menu [4] "Reference Signal
Source"
Setting Value Internal (default)/ External
Internal: Uses the built-in reference signal transmitter of this
transceiver.
External: Uses the external frequency input from the REF IN
connector as the reference frequency.
This transceiver may not function properly if the
●
reference input level from the external source is low or if
there is deviation in the frequency.
Please refer to (17-2) for the adjustment of internal
●
reference frequency.

Switching the CTCSS Mute Operation

Configure in Advanced Menu [13] "CTCSS Unmute
for Internal Speaker"
Setting Value Mute (default)/ Unmute
• When combining the use of CTCSS to prevent unwanted
signals such as noise from being transmitted from the base
station to the Internet while operating this transceiver as a
VoIP amateur radio base station, configure to "Unmute" so
that the status of the operating frequency can be verified.
Doing so outputs all RX audio signals from the speaker
regardless of the matching status of the CTCSS frequency.
Only RX signals with a matching CTCSS frequency are
output from the ACC 2/USB port.

Configuring the SQL Control Signal

When operating this transceiver with an external device such as
PC connected to the ACC 2 connector on the rear panel, the status
of the SQL control signal for the PSQ pin of the ACC 2 connector
can be configured.

Configuring the Logic of PSQ

Configure the SQL control signal logic of the PSQ pin.
Configure in Advanced Menu [14] "PSQ Logic State"
Setting Value Low (default)/ Open
• Configure to "Open" to enable the VoIP application installed on
the PC to detect a busy state even when the power of this
transceiver is OFF. Also, configure the busy detection logic of
the VoIP application so that it matches that of this transceiver.
16-8

Configuring the PSQ Output Conditions

Configure the transition in the status of the SQL control signal
output from the PSQ pin.
Select Advanced Menu [15] "PSQ Reverse
Condition".
Off/ Busy/ Sql (default)/ Send/ Busy-Send/ Sql-
Setting Value
Send
• The PSK behavior in each of the setting is as follows.
Setting Value
Off Fixed in the low (inactive) state.
Switches the SQL control signal to the high (active)
Busy state regardless of the matching status of the
CTCSS frequency received.
When CTCSS is ON, SQL control signal switches
to the high state when the CTCSS received
matches the CTCSS configured on this
transceiver.
Sql
When CTCSS is OFF, SQL control signal switches
to the high state when a signal is received by this
transceiver regardless of the matching status of
CTCSS.
Switches the SQL control signal to the high state
Send
when this transceiver transmits a signal.
Switches the SQL control signal to the high state
Busy-Send when this transceiver transmits or receives a
signal.
Switches the SQL control signal to the high state
Sql-Send in the same way as when the setting is configured
to "Sql" and "Send".

Switching the COM Connector Signal

The CTS/RTS terminal of the COM connector on the rear panel
can be configured such that it operates in the same way as the
PSQ/PKS terminal of the ACC 2 connector.
1 Configure in Advanced Menu [16] "PSQ/PKS Pin
Assignment (COM Connector)".
Setting Value Off (default)/ On
Off: The COM connector processes both the CTS and RTS
signals.
On: The signals of the CTS and RTS pins of the COM connector
are replaced by PSQ and PKS signals respectively.
• A message to confirm the behavior of the COM connector is
displayed.
2 Reboot this transceiver.
After this transceiver reboots, the new settings are applied.
The behavior of the output signal of each setting is as follows.
COM Connector on Rear
Off
(CTS/RTS)
TxD (stopped state)
RxD (stopped state)
On
(PSQ/PKS)
Behavior
Panel
Pin 2: RxD
Pin 3: TxD
Pin 8: CTS
Pin 7: RTS
Pin 5: GND
Pin 8: PSQ
Pin 7: PKS
Pin 5: GND
PC
RxD
TxD
CTS
RTS
GND
RxD
TxD
CTS
RTS
GND