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Model TS-64WDS
Miniature 64 Tone CTCSS Encoder-Decoder with Dip Switch
The Communications Specialists Model TS-64WDS Miniature 64 Tone CTCSS Encoder-Decoder is a
microprocessor based product used for encoding and decoding subaudible tones. The TS-64WDS is
compatible with continuous tone controlled squelch systems (CTCSS) used in land mobile radio such
as ‘Private Line’, ‘Channel Guard’, and ‘Quiet Channel’.
Because of its small size and low power consumption, advanced engineering has resulted in a product
that is ideal for mobile and portable two-way FM radio installations. Simple field programming by a
miniature dip switch and jumper pads allows the radio service shop to configure the CTCSS tone,
Transmit Time-out-timer, Hang-up/Busy function, and on board LED indicator. Squelch tail elimination
is achieved by the use of a ‘reverse phase burst’ at the end of each transmission. An audio high pass
filter eliminates the CTCSS signal from the recovered audio.
Section
Description
1.0
Operating Instructions
2.0
Programming the TS-64WDS
2.1
CTCSS tone programming
2.2
Transmit time-out-timer programming
2.3
PCB LED indicator
3.0
Installation Instructions
3.1
Adjustment
4.0
Specifications
1.0 OPERATING INSTRUCTIONS
The TS-64WDS is designed to encode and decode CTCSS transmissions in conjunction with an asso-
ciated FM radio transceiver. Upon receipt of a programmed CTCSS coded transmission, the TS-
64WDS will unmute the receiver audio and allow audio to pass. While the TS-64WDS is decoding, an
internal timer keeps the audio path open for approximately 350 ms during a loss of signal due to signal
fade. Upon receipt of the turn off code, theTS-64WDS will immediately mute the receiver audio thus
eliminating the squelch tail that is usually heard at the end of a transmission. The microphone Hang-up
Input allows the operator to override the decoder and open up the audio path for channel monitoring.
When the PTT switch is keyed on the microphone, the TS-64WDS will key the transmitter and immedi-
ately begin generating the programmed CTCSS tone for transmission. The TS-64WDS will continue to
generate the CTCSS tone for as long as the PTT switch is pressed. Upon release of the PTT switch,
the TS-64WDS will continue to key the transmitter for approximately 160 ms. During this time, the TS-
64WDS will generate a reverse phase burst which will mute the decoding unit at the other end of the
transmission medium. At the end of the 160 ms period, the TS-64WDS will unkey the transmitter. If
activated, an internal Transmit Time-out-timer will limit transmissions to a programmed length, thus
eliminating problems with stuck microphones and the like.
2.0 PROGRAMMING THE TS-64WDS
This section of the instructions describes how to program the TS-64WDS to suit the needs of your radio
system. These programming features are designed to be programmed by the installing technician. The
TS-64WDS may be programmed before or after it is installed in the associated radio set. The TS-
64WDS is programmed by the dip switch (setting CTCSS tone frequency) and installing ‘solder bridges’
across the four jumper pads, T01,T02,T03 and H/B (hang-up/busy) if needed. A low wattage soldering
iron with a small tip should be used to place a small solder bridge across the various jumper pads.
When programming the unit, be careful not to damage the TS-64WDS printed circuit board. The TS-
64WDS comes from the factory with the jumper pads all open, which is the most common configura-
tion. See the Parts Layout Diagram for the location of the jumper pads.
2.1 CTCSS TONE PROGRAMMING
CTCSS tone frequency is programmed using the miniature dip switch. A total of 64 different
subaudible tones can be selected. Simply slide each of the 6 switches either ON or OFF to select the
desired frequency. The table to the right shows the switch positions required to select each CTCSS
tone frequency. Please note that tones marked with a ‘*’ are not EIA tones, should only be used for
special applications, and may not work in harmony with adjacent EIA tones.
2.2 TRANSMIT TIME-OUT-TIMER PROGRAMMING
The Transmit time-out-timer is used to limit the duration of a continuous transmission to a maximum
length as programmed by the jumper pads T01, T02, and T03. The timer can be programmed with
eight different timeout intervals. These are listed in the table below. The Transmit time-out-timer is
disabled when received from the factory.
TIMEOUT INTERVAL
T01
T02
T03
DISABLED
out
out
out
15 seconds
bridge
out
out
30 seconds
out
bridge
out
45 seconds
bridge
bridge
out
1 minute
bridge
out
bridge
2 minutes
out
bridge
bridge
3 minutes
out
out
bridge
5 minutes
bridge
bridge
bridge
Tone
#1
#2
#3
#4
#5
#6
33.0*
OFF
ON
ON
OFF
OFF
OFF
35.4*
ON
ON
ON
OFF
OFF
OFF
36.6*
OFF
OFF
OFF
ON
OFF
OFF
37.9*
ON
OFF
OFF
ON
OFF
OFF
39.6*
OFF
ON
OFF
ON
OFF
OFF
44.4*
ON
ON
OFF
ON
OFF
OFF
47.5*
OFF
OFF
OFF
ON
ON
OFF
49.2*
ON
OFF
OFF
ON
ON
OFF
51.2*
OFF
ON
OFF
ON
ON
OFF
53.0*
ON
ON
OFF
ON
ON
OFF
54.9*
OFF
OFF
ON
ON
ON
OFF
56.8*
ON
OFF
ON
ON
ON
OFF
58.8*
OFF
ON
ON
ON
ON
OFF
63.0*
ON
ON
ON
ON
ON
OFF
67.0
OFF
OFF
OFF
OFF
OFF
OFF
69.4*
ON
ON
ON
OFF
ON
OFF
71.9
OFF
OFF
OFF
OFF
OFF
ON
74.4
ON
OFF
OFF
OFF
OFF
OFF
77.0
OFF
OFF
OFF
OFF
ON
ON
79.7
OFF
ON
OFF
OFF
OFF
OFF
82.5
ON
OFF
OFF
OFF
OFF
ON
85.4
ON
ON
OFF
OFF
OFF
OFF
88.5
ON
OFF
OFF
OFF
ON
ON
91.5
OFF
OFF
ON
OFF
OFF
OFF
94.8
OFF
ON
OFF
OFF
OFF
ON
97.4*
ON
OFF
ON
OFF
OFF
OFF
100.0
OFF
ON
OFF
OFF
ON
ON
103.5
ON
ON
OFF
OFF
OFF
ON
107.2
ON
ON
OFF
OFF
ON
ON
110.9
OFF
OFF
ON
OFF
OFF
ON
114.8
OFF
OFF
ON
OFF
ON
ON
118.8
ON
OFF
ON
OFF
OFF
ON
123.0
ON
OFF
ON
OFF
ON
ON
127.3
OFF
ON
ON
OFF
OFF
ON
131.8
OFF
ON
ON
OFF
ON
ON
136.5
ON
ON
ON
OFF
OFF
ON
141.3
ON
ON
ON
OFF
ON
ON
146.2
OFF
OFF
OFF
ON
OFF
ON
151.4
OFF
OFF
OFF
ON
ON
ON
156.7
ON
OFF
OFF
ON
OFF
ON
159.8*
OFF
ON
ON
OFF
ON
OFF
162.2
ON
OFF
OFF
ON
ON
ON
165.5*
ON
OFF
ON
OFF
ON
OFF
167.9
OFF
ON
OFF
ON
OFF
ON
171.3*
OFF
OFF
ON
OFF
ON
OFF
173.8
OFF
ON
OFF
ON
ON
ON
177.3*
ON
ON
OFF
OFF
ON
OFF
179.9
ON
ON
OFF
ON
OFF
ON
183.5*
OFF
ON
OFF
OFF
ON
OFF
186.2
ON
ON
OFF
ON
ON
ON
189.9*
ON
OFF
OFF
OFF
ON
OFF
192.8
OFF
OFF
ON
ON
OFF
ON
196.6*
OFF
OFF
OFF
OFF
ON
OFF
199.5*
ON
ON
ON
ON
OFF
OFF
203.5
OFF
OFF
ON
ON
ON
ON
206.5*
OFF
ON
ON
ON
OFF
OFF
210.7
ON
OFF
ON
ON
OFF
ON
218.1
ON
OFF
ON
ON
ON
ON
225.7
OFF
ON
ON
ON
OFF
ON
229.1*
ON
OFF
ON
ON
OFF
OFF
233.6
OFF
ON
ON
ON
ON
ON
241.8
ON
ON
ON
ON
OFF
ON
250.3
ON
ON
ON
ON
ON
ON
254.1*
OFF
OFF
ON
ON
OFF
OFF
*
NON EIA STANDARD TONES
2.3 PCB LED INDICATOR
There is a small green LED on the component side of the TS-64WDS PCB to indicate
status. There are 3 jumper pads on the bottom side of the PCB that can have a “solder
bridge” installed between the center pad and either or both of the other 2 pads to indicate
status as follows:
Center pad to MUTE 2 LED pad=LED only on when decoding or mike is off-hook
(as shipped)
Center pad to MUTE 1 LED pad=LED only off when decoding or mike is off-hook
Center pad to both MUTE 2 and MUTE 1 pads=LED is a power on indicator only
Center pad not bridged=LED is always off
Summary of Contents for TS-64WDS
Page 2: ...PARTS LAYOUT DIAGRAM...
Page 3: ...SCHEMATIC...
