TT-9
DTMF Dialing Encoder
Manual Revision: 2011-07-15
1
SPECIFICATIONS
Operating Voltage 5.5-15 VDC
Operating Current 3 mA
PTT Output Current 250 mA
Audio Output Level 0-750 mV(rms)
Audio Output Impedance 1 K or 50 K
Twist 0-3 dB
Max Tone Distortion 2%
Interkey Time (Auto PTT) 2 seconds
Adjustment Pots 1 Turn
Operating Temperature -30° to +60°C
Dimensions with Bezel Frame (standard) 2.4" x 1.9" x 0.4"
Dimensions without Bezel Frame 2.0” x 1.5" x 0.25"
GENERAL INFORMATION
The TT-9 is a 12-digit DTMF dial encoder with snap-dome keypad in a mountable bezel frame. The TT-9 will
automatically assert the PTT output when a button is pressed and hold the PTT output for 2 seconds for
subsequent digits to follow. The DTMF tones are generated out the TX Audio Output for as long as the key is
pressed.
The following diagram shows the DTMF tone pairs generated when a particular digit is pressed. For example
when the 1 digit is pressed the TT-9 will generate 697 Hz and 1209 Hz simultaneously.
1 2 3
697 Hz
4 5 6
7 8 9
* 0 #
1209
Hz
1336
Hz
770 Hz
852 Hz
941 Hz
1477
Hz
2
HARDWARE INSTALLATION
Be certain to follow standard anti-static procedures when handling any of Midian’s products.
Connector P1
P1-1 – Green – TX Audio Output – Connect to a high impedance audio point in the transmitter modulator.
P1-2 – Red – 5.5 - 15 VDC – Connect to switched battery point in the radio.
P1-4 – Black – Ground – Connect to the nearest ground plane in the radio.
P1-5 – Blue – Speaker Output– Connect to the high side of the radio's speaker. The speaker completes the
ground for the emitter follower Q3. CAUTION: When attaching this lead to a 4 or 8 Ohm speaker, add a 100
Ohm resistor in series with this blue lead to limit current. When using 20-40 Ohm speakers, the onboard resistor
in series with Q3 should be sufficient.
P1-9 – White – PTT Output – Connect to the PTT switch of the radio. The PTT Output gives an open-collector to
ground when activated and is rated at 100 mA continuous.
The remaining 8 wires are not connected.
HARDWARE ALIGNMENT
DTMF Output Level: The DTMF output level can be adjusted for 0-750 mV RMS by adjusting R22. In a wide
band system, set R22 to 3.3 KHz (66% of 5 KHz) of deviation per EIA specifications. In a narrow band system,
set the R22 to 1.65 KHz (66% of 2.5 KHz) of deviation per EIA specifications.
R-22
3
OPERATION
DTMF Dialing: Press the desired sequence on the 12-digit keypad. When the first digit is pressed the TT-9 will
assert the PTT Output and generate the tones out the TX Audio output. The PTT Output will be held for
approximately 2 seconds. The TT-9 will generate the DTMF tones for as long as a button is pressed.
TECHNICAL NOTES
Radio Compatibility: Midian has taken the utmost care to ensure the option board integrates into the radio with
minimal impact to the features of the radio. However, some features may not be available in the radio when an
option board is used. If a feature is not available, please contact Midian to see if the feature can be added.
MIDIAN CONTACT INFORMATION
Midian Electronics Inc.
2302 East 22
nd
Street
Tucson, Arizona 85713 USA
Orders: 1-800-MIDIANS
Phone: 520-884-7981
Fax: 520-884-0422
E-mail: sales@midians.com
Web: www.midians.com
4
1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
4.7K
R1
.022u
C1
.0022u
C2
15K
R2
.1u
C3
.001u
C4
560p
C5
39K
R3
200K
R4
1.2M
R5
-
+
2
3
1
4 8
LM358
U2:1
-
+
6
5
7
LM358
U2:2
+5V
VAN
20K
R8
B25
Q1
+5V
100K
R7
10K
R6
10K
R9
+5V
2 3
A4
D1:1
1 3
A4
D1:2
560p
C6
10K
R13
+5V
2 3
A4
D2:1
1 3
A4
D2:2
560p
C7
10K
R14
+5V
2 3
A4
D3:1
1 3
A4
D3:2
560p
C8
560p
C10
.001u
C11
+
.47u
C12
OUT
1
SENSE
2
SHDN
3
GND
4
ERR
5
VTAP6FDBK
7
IN
8
MIC2951
VR1
+VIN
+
.47u
C13
+5V
*
C9
10K
R15
+5V
CS
3
SCLK
4
SI
5
SO
6
VCC
2
NC1
8
ORG
1
GND
7
CAT93C46
U3
.1u
C14
+5V
100K
R16
0
1 2 3
4 5 6
7 8 9
* #
10K
R10
+5V
10K
R11
+5V
10K
R12
+5V
OSC2
42
TCAP
41
D7
39
OSC1
43
A5
7
A6
6
A7
5
A4
8
A3
9
A1
11
A0
12
C4
27
C1
30
C6
25
GND
22
TCMP
38
IRQ
2
VDD
44
VPP
4SS37
B3
16
B0
13
B1
14
A2
10
C5
26
C3
28
C0
31
C2
29
C7
24
B4
17
B7
21
B6
20
RES
1
B2
15
B5
19
SCK
36
MOSI
35
MISO
34
RDI
32
TDO
33
NC4
3
NC1
18
NC2
23
NC3
40
MC68HC705C8
U1
.1u
C15
+5V
4.7K
R54
D25
Q8
HORN
4.7K
R53
B25
Q7
1K
R49
BUSY
1K
R50
CALL
1K
R51
PTT
4.7K
R52
560p
C26
D25
Q6
100p
C25
4.7K
R48
4.7K
R46
20K
R24
10K
R25
20K
R26
10K
R27
20K
R28
10K
R29
20K
R30
10K
R31
20K
R32
10K
R33
20K
R34
10K
R35
20K
R36
10K
R37
20K
R38
20K
R39
Q1
11
Q2
12
Q4
14
Q3
13
IN+
1
GS
3
VRef
4
INH
5
ESt
16
IN-
2
PWDN
6
StD
15
OSC2
8
OSC1
7
TOE
10
VSS
9
St/GT
17
VDD
18
*
U4
VAN
11
33
22
1M
R41
100K
R40
.022u
C23
470K
R42
1.2M
R43
23
A4
D4:1
13
A4
D4:2
.1u
C24
+5V
4.7K
R44
D25
Q3
+VIN
82R
R45
BSS
Q5
B25
Q4
47K
R47
+VIN
13
A7
D5:1
3 2
A7
D5:2 JU4
JU5
22K
R18
39K
R21
11
33
22
10K
R22
.01u
C18
22K
R19
100K
R20
560p
C19
D25
Q2
27K
R23
100p
C21
+VIN
+VIN
TX TONE OUT
[GRN]
P1:1
+VIN
[RED]
+5.5 - 15V
P1:2
COR IN
[BRN]
P1:3
GND
[BLK]
P1:4
ALERT TONE
[BLU]
SPKR OUT
P1:5
TONE IN
[ORG]
P1:6
MON/SQ OUT
[YEL]
P1:7
MIC MUTE OUT
[GRN/W]
P1:8
PTT OUT
[WHT]
P1:9
SCAN/DISABLE OUT
[GRY/W]
P1:10
PTT IN
[GRY]
P1:11
MONITOR IN
[ORG/W]
PROG IN
P1:12
EMER/AUX IN
[VIO]
P1:13
22p
C16
22p
C17
4.7M
R17
.1u
C22
+5V
CP
CJS
1991-09-23
DML
2013-12-19
B-2
1 of 1
7249
MIDIAN ELECTRONICS, INC.
DATE:
DESIGN:
DWN BY:
REV:
APPR
COPYRIGHT ©
REV
SHEET
PROJECT NUMBER
DOCUMENT NAME
SCHEMATIC
2013
TT-9
.47u
C20
NOTES:
* = NOT INSTALLED
DTMF DECODER
2 TONE
5 TONE
PULSE TONE
DECODER 3.58 MHz
Y1
COP1:6
PIP106
COC1
PIC101 PIC102
COR1
PIR101 PIR102
PIR202
COR2
PIR201
PIC202
COC2
PIC201
COP1:3
PIP103
PIU203
PIU202
PIC302
COC3
PIC301
PIU208
PIU201
COU2:1
PIU204
COP1:11
PIP1011
COP1:13
PIP1013
COP1:12
PIP1012
COP1:2
PIP102
PIC1001
COC10
PIC1002
PIC1101
PIC1102
COC11
PIVR108
PIC1201
COC12
PIVR105
PIC1202
PIVR104
PIVR106 PIVR107
COP1:4
PIP104
COR3
PIC602
PIC601
PIC701
PIC702
PIC801
PIC802
COVR1
PIVR101
PIVR102PIVR103
PIR301PIR302
PIC401
COC4
PIC402
COC6
COC7
COC8
PIC1301
PIC1302
COR4
PIR401PIR402
COD1:1
PID102 PID103
COD1:2
PID101 PID103
COD2:1
PID202 PID203
COD2:2
PID201 PID203
COD3:1
PID302 PID303
COD3:2
PID301 PID303
COC13
PIC502
COC5
PIC501
COR6
PIR601 PIR602
PIR902
COR9
PIR901
PIR1302
COR13
PIR1301
PIR1401
COR14
PIR1402
PIR1501
COR15
PIR1502
PIC901
COC9
PIC902
COU3
PIU302
PIC1402
PIC1401
PIU308
COC14
PIR1002
PIU301
PIU307
PIR1101
COR10
COR5
PIR502
COU2:2
PIQ10B
PIU205
PIU206
PIR701
COR7
PIR702
PIR1201
COR11
COR12
PIR501
PIU207
PIR802
COR8
PIR801
PIQ10C
COQ1
PIQ10E
PIU303
PIU304
PIU305
PIU306
PIR1601
PIR1602
COC15
PIU1041
PIU102
PIU1033
PIU1031
PIU1032
PIU101
PIU1021
PIU1036
PIU1023
PIU1035
PIU1034
COR16
PIC1502
PIC1501
PIU1037
COU1
COC16
PIC1602
PIC1601
PIU104
COR17
PIR1701 PIR1702
PIY101 PIY102
COY1
PIU1043PIU1044
PIU1042
PIU1039
PIU1019
PIU105
PIU106
PIU107
PIU108
PIU109
PIU1010
PIU1011
PIU1012
PIU1020
PIC1702
COC17
PIC1701
COR24
PIR2401PIR2402
PIR2501
COR26
PIR2502
PIR2601PIR2602
PIR2701
COR28
PIR2702
PIR2801PIR2802
PIR2901
COR30
PIR2902
PIR3001PIR3002
PIR3101
COR32
PIR3102
PIR3201PIR3202
PIR3302
COR34
PIR3301
PIR3401PIR3402
PIR3501
COR36
PIR3601 PIR3602
PIR3502
PIR3702
COR38
PIR3701
PIR3801PIR3802
PIR3902
PIR3901
COR46
PIR4601PIR4602
COR25
COR27
COR29
COR31
COR33
COR35
COR37
COR39
COR44
PIR4401 PIR4402
PIR4701
COR47
PIR4702
PIQ40C
COQ4
PIQ40B
PIQ40E
PIQ30B
PIQ30C
COQ3
PIQ30E
COR18
PIR1801 PIR1802
COR21
PIU407
PIU4015
PIU4010
PIU4011
PIU4012
PIU4013
PIU4014
PIU408
PIR1901 PIR1902
PIC1801
COC18
PIC1802
PIR2101PIR2102
PIU4018
COU4
PIU409
PIU401
COD5:2
PID502PID503
COD5:1
PID501PID503
COR19
COC22
PIC2201 PIC2202
PIU403
PIU402
PIU4017
PIU4016
PIU404PIU405 PIU406
COJU4
PIJU402
PIJU502
PIJU401
PIJU501
COJU5
PIR2002
COR20
PIR2001
PIQ20B
PIC1902
COC19
PIC1901
PIR4101
COR41
PIR4103
PIR4201
COR42
PIR4202
PIQ20C
PIQ20E
PIR2203
COR22
PIR2201
PIC2302
PIC2301
PIR4002
PIR4001
PIR4102
COR43
COQ2
COR23
PIR2202
PIR2301 PIR2302
COC23
COR40
PID401
COD4:2
PID403
PIR4301PIR4302
COR45
PIR4501 PIR4502
COC20
PIC2001 PIC2002
PIC2401
COC24
PIC2402
PID402
COD4:1
PID403
COC21
COP1:1
PIP101
PIC2101
PIC2102
COP1:5
PIP105
COP1:7
PIP107
PIR1001
PIBP101
PIBP102
COBP1
PIBP401
PIBP402
COBP4
PIBP701
PIBP702
COBP7
PIBP1001
PIBP1002
COBP10
PIBP201
PIBP202
COBP2
PIBP501
PIBP502
COBP5
PIBP801
PIBP802
COBP8
PIBP001
PIBP002
COBP0
PIBP302
PIBP301
COBP3
PIBP602
PIBP601
COBP6
PIBP902
PIBP901
COBP9
PIBP1102
PIBP1101
COBP11
PIR1102
PIR1202
PIU1024
PIU1025
PIU1026
PIU1027
PIU1030
PIU1029
PIU1028
PIU1022
PIU103
PIU1040
PIU1016
PIU1013
PIU1014
PIU1017
PIU1015
PIU1018
PIU1038
COR48
PIR4801PIR4802
COR53
PIR5301PIR5302
COR52
PIR5201 PIR5202
COR51
PIR5101 PIR5102
COR49
PIR4901 PIR4902
COR50
PIR5001 PIR5002
PIQ80B
PIR5401PIR5402
COR54
PIPAD401
COPAD4
PIPAD301
COPAD3
PIPAD201
COPAD2
PIPAD101
PIQ80C
COQ8
COPAD1
PIQ80E
PIQ60B
PIC2501
COC25
PIC2502
PIQ50G
PIQ70B
PIQ50D
COQ5
PIQ50S
PIQ70C
COQ7
PIQ70E
PIQ60C
COQ6
PIQ60E
PIC2602
COC26
PIC2601
COP1:8
PIP108
COP1:10
PIP1010
COP1:9
PIP109
COtb0sch1
- This page intentionally left blank -
COR17
PAR1701 PAR1702
PAVO1040
COY1
PAC1602
COC16
PAC1601
COC9
PAC901 PAC902
PAR1502
COR15
PAR1501
PAR802
COR8
PAR801
PAR602
COR6
PAR601
COR33
PAR3301 PAR3302
COR35
PAR3501 PAR3502
COR31
PAR3101 PAR3102
COR29
PAR2901 PAR2902
PAC1702
COC17
PAC1701
PAC1502
COC15
PAC1501
PAQ10C
COQ1
PAQ10B PAQ10E
COR7
PAR701 PAR702
PAR3202
COR32
PAR3201
PAR3702
COR37
PAR3701
PAR3902
COR39
PAR3901
COR30
PAR3001
COR27
PAR2701 PAR2702
COR25
PAR2501 PAR2502
COR28
PAR2801
PAR2602
COR26
PAR2601
COR24
PAR2401
PAU1040
PAY102PAY101
PAVO1041
PAU1041
PAVO1042
PAU1042
PAVO1043
PAU1043
PAVO1044
PAU1044
PAU101
PAU102
PAU103
PAU104
PAU105
PAU106
PAU107
COR34
PAR3401 PAR3402
PAR3602
COR38
PAR3801 PAR3802
COR36
PAR3601
PAU409 PAU408
PAU407
PAR3002
PAR2802
PAR2402
COU4
PAU4012
PAU4011PAU4010
PAVO1035
PAVO1036PAVO1037PAVO1038PAVO1039
PAU1035
PAU1036PAU1037PAU1038PAU1039
COU1
PAVO1014
PAVO1015
PAU108 PAU109
PAR4102
PAU406 PAU405 PAU404 PAU403
PAU1010
PAU1011
PAU1012 PAU1013 PAU1014
COR1
PAR4103
COR41
PAR101 PAR102
PAR4101
PAU4016PAU4015PAU4014PAU4013
PAC101 PAC102
PAU402
PAU401
PAC502
COC5
PAC501
PAU4018
PAU4017
PAVO1016 PAVO1017
PAU1015
PAU1016 PAU1017
COC2
PAC201
COC1
PAU204 PAU203
COVO1
PAR302
COR3
PAR301
PAC2202
PAC2201
PAR4302
COC22
COR43
PAR4301
COtb0sch1
PAVO1029PAVO1030PAVO1031PAVO1032PAVO1033PAVO1034
PAU1029PAU1030PAU1031PAU1032PAU1033PAU1034
PAVO1028
PAU1028
PAVO1027
PAU1027
PAVO1026
PAU1026
PAVO1025
PAU1025
PAVO1024
PAU1024
PAVO1023
PAU1023
PAVO1022
PAU1022
PAVO1021
PAU1021
PAVO1020
PAU1020
PAVO1019
PAU1019
PAVO1018
PAU1018
PAU304
PAU305
COR16
PAR1601 PAR1602
COR52
PAR5201 PAR5202
COR50
PAR5001 PAR5002
COR49
PAR4901 PAR4902
COR51
PAR5101 PAR5102
COR2
PAC202
PAR201
PAU202
COU2
PAU207
PAU206PAU205
PAR4202
COR42
PAR4201
PAC402
PAR202
COC4
PAC401
PAU201
PAR402
COR4
PAR401
PAR502
PAU208
COR5
PAR501
PAD401
PAD402
COD4
PAD403
PAU303
PAU302 PAU301
COU3
PAU306
PAC1402
PAC1401
PAU308PAU307
COC26
PAC2601 PAC2602
PAC2502
COC25
PAC2501
PAPAD101
PAPAD201
PAPAD301
PAPAD401
COPAD1
COPAD2
COPAD3
COPAD4
COR40
PAR5402
PAR5401
PAR4001 PAR4002
COR44
PAR4401 PAR4402
PAR2102
PAR2101
PAC302
PAC301
PAR4502
COR21
COC3
COR45
PAR4501
PAR2002
COR20
PAR2001
PAC2402
COC24
PAC2401
COR18
PAR1801
PAR1002
COR10
PAR1001
COC14
COC6
PAC601
PAC602
PAQ60C
COQ6
PAQ60B
COR54
PAQ80B
COQ8
PAQ80E
COR46
PAR4601 PAR4602
PAVO10B
PAQ40B
PAVO10E
PAQ40E
PAQ30B
PAQ30E
PAD503
COQ4
PAVO10C
PAQ40C
PAR4702
COR47
PAR4701
COQ3
PAQ30C
PAQ20C
COQ2
PAQ20B
PAQ20E
COC18
PAC1801 PAC1802
PAR1902
COR19
PAR1802
PAR1901
COR13
PAR902
PAR1301 PAR1302
COR9
PAR901
COD1
PAD103
PAR5302
COR53
PAR5301
COR48
PAQ60E
PAR4801 PAR4802
PAVO10G
PAQ50G
COQ5
PAQ80C
PAVO10S
PAQ50S
PAD502
COD5
PAC2302
COC23
PAC2301
PAVR104 PAVR103
PAJU402
PAJU502
PAD501
PAR1102
COR11
PAR1101
PAVR102
COVR1
PAVR107
PAVR106PAVR105
COR22
PAR2202
COR23
PAC1902
PAR2301 PAR2302
COC19
PAC1901
COR14
PAR1401 PAR1402
PAD201
PAD101
PAD102
PAVO10D
PAQ50D
COJU4
COJU5
COD2
PAD203
PAD301
COD3
PAD303
PAD302
PAQ70B
COQ7
PAQ70C
PAQ70E
PAJU401
PAJU501
COR12
COC7
PAC701
PAD202
COC8
PAC801
PAR1201 PAR1202
PAC1301
PAVR101
COC13
PAC1302
PAC1102
PAVR108
PAC1101
PAR2203
PAR2201
COC20
COP1
COC11
PAC1201
COC12
PAC1202
COC10
PAC1001
COC21
PAC2101
PAC2002PAC2001
PAC702
PAC802
PAVO1013
PAP1013
PAVO1012
PAP1012
PAVO1011
PAP1011
PAVO1010
PAP1010
PAVO109
PAP109
PAVO108
PAP108
PAVO107
PAP107
PAVO106
PAP106
PAVO105
PAP105
PAVO104
PAP104
PAVO103
PAP103
PAVO102
PAP102
PAVO101
PAP101
PAC1002
PAC2102
COBP10
COBP7
COBP4
COBP1
PABP1002
PABP1001
PAVO2013
PAVO2012
PAVO2011
PAVO2010
PAVO209
PAVO208
PAVO207
PAVO206
PAVO205
PAVO204
PAVO203
COBP0
PABP002
PABP001
COBP11
PABP702
PABP701
COBP8
PABP802
PABP801
COBP9
PABP402
PABP401
COBP5
PABP502
PABP501
COBP6
PABP102
PABP101
COBP2
PABP202
PABP201
COBP3
PAVO202
PABP1102
PABP902
PABP602
PABP302
COVO2
PAVO201
PABP1101
COtb0sch2
PABP901
PABP601
PABP301
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