Optical In And Optical Out Connectors - Kenwood TS-990S In-Depth Manual

Pin Pin
No. Name
9 PKS
10 SMET
11 ANI
12 GND
13 SS

OPTICAL IN and OPTICAL OUT Connectors

The TS‑990S can be connected to a commercially available audio device with optical digital I/O terminals via the
OPTICAL IN and OPTICAL OUT connectors.
Having no electrical contact between devices, these connectors serve to prevent problems such as a harmonics
crosstalk and electric hum superimposition. With direct digital signal input from and output to DSPs through the
connectors, a high‑quality TX/RX environment can be established.
Output format (configuration for reversion of the left and right channels, mixing ratio) for the optical digital output
(received audio: conform to 48 kHz sampling frequency and 24 bits) can be configured in Menu 7‑8 "Optical: Audio
Output Configuration". (The default is received audio for the left channel of the main band and the right channel of the
sub band.)
The optical digital input (transmitting audio: conforms to 44.1 kHz and 48 kHz sampling frequencies and 24 bits and 16
bits) converts stereo signals to monaural signals.
Connect this pin to the PTT output of a TNC/MCP/PC connection interface.
• Connecting the PKS pin to GND starts transmission.
• The input sound source for the transmission by the PKS pin can be selected in the
settings screen that appears with a long press of the [DATA/SEL] key.
Sub band meter level output
• The meter type for output and the output level can be changed in Advanced Menus 1
and 3.
Data communication audio input
• Connect this pin to the audio output of a PC (or PC connection interface) or external
device.
• The audio output level is not associated with the [MIC] knob (Microphone Gain).
• The audio input level can be changed in Menu 7‑06. With the audio output level set to
"0", almost no modulated audio is transmitted. With the default value of "50", entering
a 10‑mVrms signal transmits the typically modulated audio signal, and with the audio
output level set to "100", entering a 1‑mVrms signal transmits the typically modulated
audio signal. (Input impedance: 10 kΩ)
• Signal ground
PTT input
• The function of this pin is the same as that of Pin 2 of the MIC connector and Pin 3 of
the REMOTE connector.
• This is the same behavior as when the [SEND] key is pressed.
• Connecting the SS pin to GND starts transmission.
• The input sound source for the transmission by the SS pin can be selected in the
settings screen that appears with a long press of the [DATA/SEL] key.
Fig. 138 OPTICAL IN and OPTICAL OUT Terminals
Function
TERMINAL 08
I/O
I
O
I
—
I
89