TDS-3 CTCSS Encoder & DCS Encoder
Manual Revision: 2013-02-27 Covers Software Revisions: TDS-3: 1.3 and higher Covers Hardware Revisions: TDS-3: 349C
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SPECIFICATIONS Operating Voltage Operating Current Operating Temperature Frequency Range Maximum Tone Distortion PTT Output Current Audio Output Level Audio Output Impedance Dimensions
5.5 - 15 VDC 2 mA -30 to +60oC 0-300 Hz 1.0% 200 mA 0-1V RMS 22 K Ω 0.68" L x 0.93" W x 0.17" H
GENERAL INFORMATION Midian’s TDS-3 is a CTCSS encoder (aka PL) and DCS encoder (aka DPL). The TDS-3 encodes the 38 standard CTCSS tones, 13 split tones and custom CTCSS tones, as well as any of the 512 (85 recommended) DCS codes (000-777). The TDS-3 can be programmed for up to 4 different CTCSS and/or DCS tones using 2-line binary. The reverse burst for CTCSS and the invert & shut-off code for DCS are also supported.
PRODUCT PROGRAMMING Midian’s TDS-3 is programmed using the KL-4. Please reference the KL-4 manual for setup instructions of the KL-4 hardware and MPS software. From the product selection screen in the MPS software, select the TDS-3 from the list and click OK. Set the parameters of the product to fit the application. If any clarifications on a feature are required, move the mouse cursor over the feature name until the question mark appears and right click, a definition of the feature will be shown. After entering the parameters, save the file by going to File - Save As. Enter the file name in the File Name block and click Save. Saving the file will allow for quick and easy reprogramming of units. Plug the unit into the P5 connector on the KL-4 using the double-ended wiring harness included in the KL-4. Press and hold the PTT button on the KL-4, then press and hold the Power button and then click “Program Unit” in the menu bar to send the file to the unit. When programming is completed the buttons can be released. Follow the same procedure to read the unit, but select “Read Unit” in the menu bar.
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HARDWARE INSTALLATION Be certain to follow standard anti-static procedures when handling any of Midian’s products. P1 Connector P1-4 – Black – Ground – Connect to the nearest ground point. P1-2 – Red - +5.5 – 15 VDC – Connect to switched B+ in the radio. P1-1 – Green – TX Tone Out – Connect to the modulator circuit. Use high impedance point in the radio. If generating CTCSS, use the CTCSS point in the modulator. P1-8 – Green/White – Mic Mute – If desired, connect to mic element bias point or to some other point in the audio amp to crowbar mic audio to ground during ANI to prevent voice interference. P1-5 – Blue – Alert Tone/Speaker Audio – Connect to high side of the speaker. This provides Time-Out Timer and go-ahead tones. When using 20-40 Ohm speakers, the onboard resistor in series with Q2 should be sufficient. When attaching this lead to a 4-8 Ohm speaker, add a 100-Ohm resistor in series with the lead to limit current. P1-11 – Gray – PTT In – Requires a logic low from the radio’s PTT switch. If TOT is not needed, the PTT In & Out wires can be tied together and connected directly across the radio’s PTT switch. For non-common PTT, open the PTT path and connect the gray wire to the switch. P1-9 – White – PTT Out – Connect to the other side of the open PTT path as referred to in the above step. The TDS now has control of the PTT for Time Out Timer (TOT). The PTT transistor, Q3, is rated at 200 mA continuous. P1-12 – Orange/White – Program In/Code Select 1 – For Program In, this lead is connected to the Green lead from the KL-3 programmer. For code positions see the chart in the TDS-3 programming software. P1-13 – Violet – Program Out/Code Select 0 – For Program Out, this lead is connected to the Yellow lead from the KL-3 programmer. For code positions see the chart in the TDS-3 programming software. Installation Diagrams: The following installation diagrams are provided to give an idea of how the audio wire can be connected. When using DPL, the radio must be a true FM as shown in the Direct FM Modulation diagram below. In fact, a varactor diode could be added to the oscillator circuit in radios employing phase modulation.
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1
2
3
4
+5V POCSAG ALARM
ALL ANI
16
15
FORMATS
R1
A
P1:13
POCSAG
EMER IN
INPUT 1
PROG OUT
PROG OUT
C12
U1 PIC16LF818
330R
12
22p
18
A
(VIO)
(VIO)
+VIN
Y1
POCSAG
TRUNKING
INPUT 3
STATUS
PROG IN
PROG IN
(ORG/WHT)
(ORG/WHT)
3.579MHz
R3 330R
P1:12
14
17
R2 PROG ENABLE
PTT IN
POCSAG
(GRAY)
+VIN R10 C11
P1:11
330R
(GRAY)
2
13
C1
R4
R8
R9
7.5K
22K
22K
D25
+5V
C4
15K
1
INPUT 2
(GRAY/WHT)
P1:10
R14 22K
330R
560p
R6
20
R23 FACTORY
C5
.1u
30K R7
POCSAG
Q1
R5
560p
B
100K
22p
19 4
+VIN
62K
0.47u
22K
RP1
10
(GRAY/WHT)
B
C6
R11
P1:1
TX OUT TONE DATA
Q2
10K
R15
D25
(GRN)
JU1
82R
+5V U2
2
8
7
3
9
4
5
1
82R P1:5
C13
ALERT/TONE SPKR OUT
R18 .01u
100K
(BLU)
7
11
+5V
R21 100K
100K
Q4 4001
62K
POCSAG
(YEL)
Q5 4001
(BRN)
(BRN)
P1:8 MIKE MUTE
R17
4
VR1 MIC5206 R24
1
+5.5V - 15V
5
3
C2 .001u
D
Q3 4001
22K
+VIN P1:2
+5V
C15
C3
C10
0.47u
0.47u
(GRN/WHT) C14 560p
560p
C16
P1:9
PTT OUT (WHT)
PRELIMINARY
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MIDIAN ELECTRONICS, INC. DATE: DESIGN:
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Q6 4001
100p
2R
P1:4 GND
C
AUDIO EN
330R
P1:3
AUDIO EN
P1:7
R20 NOT USED
COR IN
P1:6
(ORG)
5
C
R22
6
93LC56B
R19
JU2 1
3
6
R16
3
2
8
2
2012-02-05 CJS
APPR
DWN BY: DML REV:
2012-03-27 3
TDS-3 SCHEMATIC COPYRIGHT © 2012
REV
C-2 SHEET
1 of 1 4
DOCUMENT NAME
CP PROJECT NUMBER
7349
D
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HARDWARE ALIGNMENT TX Audio Output: Adjust R-12 so that per EIA specifications CTCSS is 500 Hz to 1 KHz modulation. In Low-Z mic circuits, it may be necessary to short R11 and/or increase C6.
RADIO PROGRAMMING The TDS-3 is a CTCSS encoder and DCS encoder module that wires into most radios. Any radio specific programming, if available, would be found on any Application Notes available for those radios. You may visit our website or call us for application notes.
OPERATION Encode: When the PTT Input is taken to ground the TDS-3 will encode the selected CTCSS/DCS code based on the Code Select configuration shown below:
Code 1 Code 2 Code 3 Code 4
Code Select 0 Open Ground Open Ground
Code Select 1 Open Open Ground Ground
MIDIAN CONTACT INFORMATION MIDIAN ELECTRONICS, INC. 2302 East 22nd Street Tucson, Arizona 85713 USA Toll-Free: 1-800-MIDIANS Main: 520-884-7981 E-mail:
[email protected] Web: www.midians.com
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