Kenwood TS-590SG Manual page 16

01 RECEPTION
Hints and Tips
● The output level of the headphone jack is too high?
The TS-590S is designed based on connection with a headphone with an impedance of 8 Ω. Therefore, if you use a headphone
with impedance higher than 8 Ω, you will experience the following symptoms.
• The volume level is too high overall.
• Even if AF Volume is turned down, a hissing residual noise is audible.
If you experience these symptoms, use a set of headphones with impedance close to 8 Ω.
The TS-590SG lowers the impedance at the headphone jack to reduce these kinds of symptoms when a high impedance
headphone is used. This will reduce the hissing noise by approximately 8 dB compared to TS-590S when the impedance of the
headphone is 32 Ω . In this case, increase the AF VR slightly to adjust to the same volume as TS-590S.
Hints and Tips
● Antenna output connector
In recent years, spectrum scope is realized externally by combining receivers of the direct mixer type or digital conversion type,
which are collectively referred to as SDR, with PCs and applications, and connecting with HF transceivers. Signals are generally
output to an external receiver from the IF output terminal of the HF transceiver. However, in the case of the TS-590S, the IF output
function cannot be added straightforwardly as there are multiple IF frequencies. For this reason, an antenna output connector is
introduced on the TS-590SG to obtain signals for the external receiver.
This feature was also introduced on the existing TS-870S in anticipation of the connection of a receiver as a sub-operator in a
contest.
In the actual circuit, signals from the antenna are branched by the built-in splitter circuit and fed to both the internal and external
receivers. As the splitter circuit may cause a loss of a few decibels in principle, it can be set to ON or OFF on the panel.
KENWOOD does not have any receiver or application that can be combined. You can refer to related magazine articles for the
relevant information. For some applications, the center frequency of the spectrum scope is variable in tandem with the receiving
frequency of the transceiver, so you can make use of it in the same way as an IF output terminal.
Also, this feature shares the same connector (RCA terminal) with the DRV output function. You can choose which one to use from
the menu.
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