Installation Of Option; Fts-12 Tone Squelch Unit Installation - Yaesu FT-23R MKII Operating Manual

Installation of Option

FTS-12 T
The FTS-12 is a subaudible CTCSS (Continuous Tone-Controlled Squelch System) which
offers programmable selection of 37 tones for transmission and filter/detectors for recep-
tion. Transmit-only (encode) and transmit/receive (encode/decode) modes are selectable
from keys on the transceiver. Installation is descrived here, while Tone Squelch operation
is described on page 17.
Make sure the transceiver is off. Remove the hard or soft case, if used, and remove the
battery pack as described on page 9.
1. Remove the four screws affixing the battery spring plate on the bottom of the trans-
ceiver and carefully remove the plate.
2. Locate and remove the small "Dummy Unit" circuit board connected to the 10-pin
connector in the compartment on the bottom of the transceiver. It is not needed when
the FTS-12 is installed.
Note: If the FTS-12 is later removed, the Dummy Unit must be replaced in the 10-pin
connector to allow normal operation.
3. Connect the plug in the transceiver to the FTS-12.
4. Locate the double-sided adhesive tape that is already installed inside the compartment
on the bottom of the transceiver, and remove the paper cover from the tape. Then
mount the FTS-12 by pressing the flat surface of the IC (on the FTS-12) against the
tape (see below).
5. Apply the (supplied) insulating adhesive tape to the battery spring plate.
6. Replace the battery spring plate and its four screws, and the battery pack.
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S
ONE QUELCH
U I
NIT NSTALLATION
FT-23R O
PERATING
MKII
M
ANUAL