Configuring The Band Direct Key During Split Operation; Tf-Set (Setting The Tx Frequency); Agc - Kenwood TS-890S Instruction Manual

5 COMMUNICATING AIDS
Configuring the Band Direct Key during Split
Operation
Three options are available for selection with regard to the
behavior when the band direct key is pressed during split
operation.
Configure in Menu [3-13] "Band Direct Keys in Split
Mode"
RX Band (default)/ RX Band and Cancel Split
Setting Value
Mode/ RX/ TX Band
RX Band: Changes the receiving band.
RX Band and Cancel Split Mode: Changes the receiving
band and cancels the split mode.
RX/TX Band:
• Changes both the receiving and transmitting bands at the
same time.
• The transmitting band and receiving band is assigned with
the same memory number.
• Each band can be adjusted while maintaining the split status.

TF-SET (Setting the TX Frequency)

TF-SET is a function for temporarily switching the TX frequency
and RX frequency. Signals can be received at one's own
frequency while the TF-SET switch is pressed and held down, and
the TX frequency can also be changed in this state. Doing so
allows checking of whether there is interference in the newly-
selected TX frequency.
• A call is made to the target station when there is no interference
and at the right timing to ensure smooth communication with DX
stations that are receiving calls from a large number of stations.
In other words, the communication status of the DX station in
the presence of interfering signals are taken into consideration
and transmission is carried out using the TF-SET function at the
instant when the DX station is in the receiving state and there is
no transmission from other stations. Putting this function to
good use enables communication with a larger number of DX
stations.
1 Configure the split operation frequency.
2 Press and hold [TF-SET].
The TX frequency and RX frequency are switched.
3 Turn the Tuning control while pressing and holding
[TF-SET], or press [UP]/[DWN] on the microphone.
Signals are received at the new TX frequency.
4 Release [TF-SET].
Reception starts at the original RX frequency.
Adjustment of the split frequency using the [RIT/XIT]
●
control is disabled during TF-SET.
Turning on the frequency lock before using the TF-SET
●
function helps to prevent the transceiver from losing
communication with the DX station due to erroneous
operation.
5-2

AGC

AGC (Automatic Gain Control) is a function for controlling the IF
gain automatically so as to minimize fluctuations in the strength of
the signal that is being received.
• The AGC time constant is configured to FAST, MID or SLOW
according to the receiving status and operation mode (other
than FM mode).
• The digital AGC circuit of this transceiver divides the time
constant into 20 levels from SLOW to FAST, with "1" being the
fastest and "20" the slowest.
• Generally, the time constant is configured to a fast time constant
in the CW and FSK modes where fluctuations in the signal
strength are well defined, and a slow time constant is used in
the SSB and AM modes where changes are gradual.
• However, a fast time constant is also useful in the SSB and AM
modes to perform tuning quickly or when receiving weak
signals.
• AGC can also be turned off.
• A different default time constant for AGC is configured for each
mode as shown below.
Default AGC Time Constant Setting
Mode
SSB
SSB-DATA
CW
FSK
PSK
AM
AM-DATA
Setting Display
SLOW
AGC-S
SLOW
FAST
FAST AGC-F
FAST
SLOW
AGC-S
SLOW