Kenwood TK-190 Instruction Manual page 18

• Scan: Press to start the scan sequence. Press again to
stop scanning. See "SCANNING" on page 7.
• Scrambler: Press to turn the scrambler ON. Press
again to turn it OFF. Press and hold for  seconds
to enter Scrambler Code Select mode. See "Voice
Scrambler" on page 6.
Note: You must first install the optional voice scrambler board
before you can use this feature.
• Shift: Press and hold, then press a second PF key to
access the second function of the selected PF key.
• SP Attenuation: Press to decrease the speaker
volume of the optional. Press again to return control
of the volume to the Volume control of the speaker/
microphone.
• Squelch Level: Press to enter Squelch Level mode.
See "Adjusting the Squelch" on page 6.
• Squelch Momentary: Press and hold to deactivate the
squelch (unmute the speaker). Release to reactivate the
squelch. While squelch is OFF, "MON" appears on the
display and the BUSY LED (green) lights.
• Squelch OFF: Press to deactivate the squelch (unmute
the speaker). Press again to reactivate the squelch.
While squelch is OFF, "MON" appears on the display
and the BUSY LED (green) lights.
• Talk Around: Press to activate Talk Around mode.
Press again to exit Talk Around mode. You can use this
feature to talk directly to another transceiver that is within
the transmitting range of your transceiver. While Talk
Around is active, "tA" appears on the display.