Midian Electronics TRE-2 User manual

1
TRE-2
Tone Remote Encoder
Manual Revision: 2013-04-04
Covers Firmware Revisions:
TRE-2: 4.0
Covers Hardware Revisions:
UE-1: 7287D

2
SPECIFICATIONS
Operating Voltage +5.5-15 VDC
Operating Current 2.6 mA
Operating Temperature -30 - +60 C
PTT Output Current 200 mA
Audio Output Level 1V RMS
Audio Output Impedance 10K/22 K
Dimensions 1.27” x .83” x .17”
Timing:
High Level Guard Tone 120 msec
Function Tone 40 msec
Frequency:
Guard Tone 2175 Hz
Monitor 2050 Hz
F1 1950 Hz
F2 1850 Hz
Frequencies with Optional Keypad
F3 1750 Hz
F4 1650 Hz
F5 1550 Hz
F6 1450 Hz
F7 1350 Hz
F8 1250 Hz
F9 1150 Hz
F10 1050 Hz
F11 950 Hz
F12 750 Hz
Levels (Relative):
High Level Guard Tone +10 dB
Function Tones 0 dB
Low Level Guard Tone -20 dB
GENERAL INFORMATION
Midian’s TRE-2 can convert a DC remote into a tone remote or upgrade an existing tone remote controller to have
more function tones. The TRE-2 can be added to a Telco Butt-In Test Set to use as a test instrument for tone
remote lines. The TRE-2 generates the high-level 2175 Hz guard tone, followed by the desired function tone and
then the continuous low-level 2175 Hz guard tone.

3
HARDWARE INSTALLATION
Be certain to follow standard anti-static procedures when handling any of Midian’s products.
P1-4 – Black – Ground – Connect to the nearest ground point.
P1-2 – Red - +5.5 – 15 VDC – Connect to switched B+ in the radio.
P1-3 – Brown – Test Mode – Connecting this wire to B+ and pressing PTT puts the TRE-2 into a test mode. This
extends all of the tones to about 8 seconds each to facilitate setting the output level using pot R30.
P1-1 – Green – TX Tone Out – Connect to modulator circuit. Use high impedance point in radio. Low-Z will cause
low frequency roll-off across C10 output coupling cap and R31. In Low-Z mic circuits, it may be necessary to short
R31 and increase C10.
P1-5 – Blue – Alert Tone/Speaker Audio – Connect to high side of the speaker with the other side of the speaker
at ground. This allows the monitoring of the tones if desired. When using 20-40 Ohm speakers, the onboard
resistor in series with Q3 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. Sends either the Tone 1 (default = F1
1950 Hz) or Tone 2 (default = F2 1850 Hz) keying tone based on logic level at F1/F2 input.
P1-12 – Orange/White –Monitor – Grounding this lead transmits the monitor function tone.
P1-13 – Violet – F1/F2 Select – High or open selects Tone 1. Grounding this wire selects Tone 2.
HARDWARE ALIGNMENT
To set the alignments, connect the brown wire to B+ and the gray wire to ground. This puts the unit into Test
Mode which lengthens the tones to approximately 8 seconds each for alignment purposes.
Installation into a Balanced Audio Device:
Adjust R30 for the high-level 2175 Hz guard tone at a relative level of +10 dB, followed by the selected function
tone at a relative level of 0 dB, followed by low-level guard tone at –20 dB relative level.
Installation into a Two-Way Radio:
Set the modulation pot R30 to the transmitter’s maximum deviation using the high-level guard tone.

4
OPERATION
When the PTT input is taken to ground, the TRE-2 generates a high level 2175 Hz guard tone for 120 msec at a
relative level of +10 dB, followed by 40 msec of the selected function tone at a relative level of 0 dB followed by a
continuous low level guard tone at –20 dB relative level.
Selecting the Function Tone: When the violet wire is high or floating, F1 is selected. When the violet wire is
taken to ground F2 is selected. For selecting the function tone via the optional keypad, leave the violet wire high
or floating. Press the keypad digit corresponding to the desired function tone in the list below. After the desired
function tone is selected, grounding the PTT input will cause the high-level guard tone, followed by the selected
function tone and then by the continuous low-level guard tone. If the unit is powered down and then powered back
up the default frequencies will be restored.
Tone Frequency Keypad Digit Tone Duration Relative Level
Guard 2175 Hz 120 msec +10 dB
Monitor 2050 Hz 40 msec 0 db
F1 1950 Hz 1 40 msec 0 db
F2 1850 Hz 2 40 msec 0 db
F3 1750 Hz 3 40 msec 0 db
F4 1650 Hz 4 40 msec 0 db
F5 1550 Hz 5 40 msec 0 db
F6 1450 Hz 6 40 msec 0 db
F7 1350 Hz 7 40 msec 0 db
F8 1250 Hz 8 40 msec 0 db
F9 1150 Hz 9 40 msec 0 db
F10 1050 Hz 0 40 msec 0 db
F11 950 Hz * 40 msec 0 db
F12 750 Hz # 40 msec 0 db
TECHNICAL NOTES
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: [e-mail]
Web: HUwww.midians.comU

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D D
C C
B B
A A
CP
CJS
1997-11-01 DML
2013-02-05
D-2
1 of 1 7287
MIDIAN ELECTRONICS, INC.
DATE:
DESIGN:
DWN BY:
REV:
APPR
COPYRIGHT ©
REV
SHEET PROJECT NUMBER
DOCUMENT NAME
SCHEMATIC
2012
TRE-2
1
P3:1
2
P3:2
3
P3:3
4
P3:4
5
P3:5
6
P3:6
7
P3:7
8
P3:8
1
P2:1
2
P2:2
3
P2:3
4
P2:4
5
P2:5
6
P2:6
7
P2:7
8
P2:8
9
P2:9
10
P2:10
11
P2:11
12
P2:12
13
P2:13
10K
R37
10K
R38
10K
R39
10K
R40
10K
R42
10K
R43
10K
R44
OSC2 36
TCMP
33
VDD 38
VPP 43
SS 32
B3 11
D7
34
OSC1 37
B0
8
B1 9
A5 2
A6 1
A7 44
A4 3
A3 4
A2 5
A1 6
A0 7
C4
21
C5
20
C3
23
C0
26
C1
25
C2
24
C6
19
C7
18
B4
12
B7
15
B6 14
GND 17
RES
41
B2
10
TCAP
35
IRQ
42
B5
13
SCK
31
MOSI
30
MISO
29
RDI
27
TDO
28
NC1
16
NC2
22
NC3
39
NC4 40
MC705C8ACFB
U1
**
JU1
10K
R1
+5V
.1u
C5
+5V
2 1
A6
D1:1
31
A6
D1:2
2 1
A6
D3:1
31
A6
D3:2
10K
R6
+5V +5V
+5V
10K
R5
+5V
B25
Q1
2 1
A6
D2:1
31
A6
D2:2
560p
C1
20K
R4
*
R34
100K
R3
4.7K
R2
+5V+5V
10K
R8
+5V
MIC5206
IN1
1
ENA
3
GND
2RES 4
OUT 5
VR1
.47u
C3
.47u
C4
.001u
C2
VIN
+5V
CS 1
SCLK 2
SI 3
SO 4
VCC 8
NC1
7
NC2
6
GND
5
CAT93C46
U2
+5V
100K
R41
100K
R7 4.7K
R36
4.7K
R35 B25
Q4
560p
C13
100p
C11
100p
C12
BSS
Q5
D25
Q3
4.7K
R32
82R
R33
VIN
4.7M
R9
3.58MHz.
Y1 22p
C14
22p
C15
10K
R11
10K
R13
10K
R15
10K
R17
10K
R19
10K
R21
10K
R23
20K
R10
20K
R12
20K
R14
20K
R16
20K
R18
20K
R20
20K
R22
20K
R24
20K
R25
47K
R29
22K
R26
22K
R27
.01u
C8
100K
R28
VIN
D25
Q2
VIN
560p
C9
11 33
22
10K
R30 22K
R31 .47u
C10
[GRN]
TX TONE OUT
TEST MODE
SIDE TONE/SPKR OUT
N/C
N/C
PTT IN
MONITOR
F1/F2
P1:1
VIN/+5V TO +15V[RED]
P1:2
[BRN]
P1:3
GND[BLK]
P1:4
[BLUE]
P1:5
N/C
P1:6
N/C
P1:7
[GRN/W]
P1:8
[WHT]
P1:9
N/C
P1:10
[GRY]
P1:11
[ORG/W]
P1:12
[VIO]
P1:13
SEE NOTE
NOTE:
*=NOT INSTALLED
REMOVE R29 TO MUTE SIDE TONE
PIC101
PIC102
COC1
PIC201
PIC202
COC2
PIC301
PIC302
COC3
PIC401
PIC402
COC4
PIC501
PIC502
COC5
PIC801
PIC802
COC8
PIC901
PIC902
COC9
PIC1001PIC1002
COC10
PIC1101
PIC1102
COC11
PIC1201
PIC1202
COC12
PIC1301
PIC1302
COC13
PIC1401
PIC1402
COC14
PIC1501
PIC1502
COC15
PID101
PID102
COD1:1
PID101 PID103
COD1:2
PID201
PID202
COD2:1
PID201 PID203
COD2:2
PID301
PID302
COD3:1
PID301 PID303
COD3:2
PIJU101PIJU102
COJU1
PIP101
COP1:1
PIP102
COP1:2
PIP103
COP1:3
PIP104
COP1:4
PIP105
COP1:5
PIP106
COP1:6
PIP107
COP1:7
PIP108
COP1:8
PIP109
COP1:9
PIP1010
COP1:10
PIP1011
COP1:11
PIP1012
COP1:12
PIP1013
COP1:13
PIP201
COP2:1
PIP202
COP2:2
PIP203
COP2:3
PIP204
COP2:4
PIP205
COP2:5
PIP206
COP2:6
PIP207
COP2:7
PIP208
COP2:8
PIP209
COP2:9
PIP2010
COP2:10
PIP2011
COP2:11
PIP2012
COP2:12
PIP2013
COP2:13
PIP301
COP3:1
PIP302
COP3:2
PIP303
COP3:3
PIP304
COP3:4
PIP305
COP3:5
PIP306
COP3:6
PIP307
COP3:7
PIP308
COP3:8
PIQ10B
PIQ10C
PIQ10E
COQ1
PIQ20B
PIQ20C
PIQ20E
COQ2
PIQ30B
PIQ30C
PIQ30E
COQ3
PIQ40B
PIQ40C
PIQ40E
COQ4
PIQ50D
PIQ50G
PIQ50S
COQ5
PIR101
PIR102
COR1
PIR201 PIR202
COR2
PIR301
PIR302
COR3
PIR401
PIR402
COR4
PIR501
PIR502
COR5
PIR601
PIR602
COR6
PIR701
PIR702
COR7
PIR801
PIR802
COR8
PIR901
PIR902
COR9
PIR1001PIR1002
COR10
PIR1101
PIR1102
COR11
PIR1201PIR1202
COR12
PIR1301
PIR1302
COR13
PIR1401PIR1402
COR14
PIR1501
PIR1502
COR15
PIR1601PIR1602
COR16
PIR1701
PIR1702
COR17
PIR1801PIR1802
COR18
PIR1901
PIR1902
COR19
PIR2001PIR2002
COR20
PIR2101
PIR2102
COR21
PIR2201PIR2202
COR22
PIR2301
PIR2302
COR23
PIR2401PIR2402
COR24
PIR2501PIR2502
COR25
PIR2601PIR2602
COR26
PIR2701 PIR2702
COR27
PIR2801
PIR2802
COR28
PIR2901
PIR2902
COR29
PIR3001
PIR3002
PIR3003
COR30
PIR3101PIR3102
COR31
PIR3201 PIR3202
COR32
PIR3301PIR3302
COR33
PIR3401
PIR3402
COR34
PIR3501 PIR3502
COR35
PIR3601 PIR3602
COR36
PIR3701
PIR3702
COR37
PIR3801
PIR3802
COR38
PIR3901
PIR3902
COR39
PIR4001
PIR4002
COR40
PIR4101
PIR4102
COR41
PIR4201
PIR4202
COR42
PIR4301
PIR4302
COR43
PIR4401
PIR4402
COR44
COtb0sch1
PIU101
PIU102
PIU103
PIU104
PIU105
PIU106
PIU107
PIU108
PIU109
PIU1010
PIU1011
PIU1012
PIU1013
PIU1014
PIU1015
PIU1016
PIU1017
PIU1018
PIU1019
PIU1020
PIU1021
PIU1022
PIU1023
PIU1024
PIU1025
PIU1026
PIU1027
PIU1028
PIU1029
PIU1030
PIU1031
PIU1032
PIU1033
PIU1034
PIU1035
PIU1036
PIU1037
PIU1038
PIU1039
PIU1040
PIU1041
PIU1042
PIU1043
PIU1044
COU1
PIU201
PIU202
PIU203
PIU204
PIU205
PIU206
PIU207
PIU208
COU2
PIVR101
PIVR102
PIVR103
PIVR104
PIVR105
COVR1
PIY101
PIY102
COY1

- This page intentionally left blank-

PAC202
PAC201
COC2
PAC501
PAC502
COC5
PAC1401 PAC1402
COC14
PAC1502 PAC1501
COC15
PAD101
PAD102
PAD103
COD1
PAP101
PAP102
PAP103
PAP104
PAP105
PAP106
PAP107
PAP108
PAP109
PAP1010
PAP1011
PAP1012
PAP1013
COP1
PAP2013
PAP2012
PAP2011
PAP2010
PAP209
PAP208
PAP207
PAP206
PAP205
PAP204
PAP203
PAP202
PAP201 COP2
PAP307
PAP306
PAP305
PAP304
PAP303
PAP302
PAP301
PAP308
COP3
PAR101PAR102
COR1
PAR702
PAR701
COR7
PAR801 PAR802
COR8
PAR902 PAR901
COR9
PAR2902 PAR2901
COR29
PAR3001
PAR3002
PAR3003
COR30
PAR3201PAR3202
COR32
PAR3302 PAR3301
COR33
COtb0sch1
PAU101
PAU102
PAU103
PAU104
PAU105
PAU106
PAU107
PAU108
PAU109
PAU1010
PAU1011
PAU1012
PAU1013
PAU1014
PAU1015PAU1016PAU1017
PAU1018
PAU1019
PAU1020
PAU1021
PAU1022
PAU1023
PAU1024
PAU1025
PAU1026
PAU1027
PAU1028
PAU1029
PAU1030
PAU1031
PAU1032
PAU1033
PAU1034 PAU1035
PAU1036 PAU1037 PAU1038 PAU1039 PAU1040 PAU1041 PAU1042 PAU1043 PAU1044
COU1
PAU201 PAU202
PAU203PAU204
PAU205 PAU206 PAU207
PAU208
COU2
PAVO107
PAVO106
PAVO105
PAVO104
PAVO103
PAVO102
PAVO101
PAVO108
PAVO1013
PAVO1012
PAVO1011
PAVO1010
PAVO109
PAVO1014
PAVO1015PAVO1016PAVO1017
PAVO1018
PAVO1019
PAVO1020
PAVO1021
PAVO1022
PAVO1023
PAVO1024
PAVO1025
PAVO1026
PAVO1027
PAVO1028
PAVO1029
PAVO1030
PAVO1031
PAVO1032
PAVO1033
PAVO1034 PAVO1035 PAVO1036 PAVO1037 PAVO1038 PAVO1039 PAVO1040 PAVO1041 PAVO1042
PAVO1043 PAVO1044
COVO1
PAVR104
PAVR105PAVR101
PAVR102
PAVR103
COVR1
PAY102
PAY101
COY1

PAC101 PAC102
COC1
PAC302
PAC301
COC3
PAC401
PAC402
COC4
PAC802PAC801
COC8
PAC902 PAC901
COC9
PAC1001 PAC1002
COC10
PAC1101
PAC1102
COC11
PAC1202
PAC1201
COC12
PAC1302
PAC1301
COC13
PAD201
PAD202
PAD203
COD2
PAD303
PAD302PAD301
COD3
PAJU101
PAJU102
COJU1
PAQ10E
PAQ10B
PAQ10C
COQ1
PAQ20C
PAQ20B
PAQ20E
COQ2
PAQ30E
PAQ30B
PAQ30C
COQ3
PAQ40C
PAQ40B
PAQ40E
COQ4
PAQ50S
PAQ50G
PAQ50D
COQ5
PAR202
PAR201
COR2
PAR301 PAR302
COR3
PAR401 PAR402
COR4
PAR502
PAR501
COR5
PAR601
PAR602
COR6
PAR1002 PAR1001
COR10
PAR1101 PAR1102
COR11
PAR1202
PAR1201
COR12
PAR1301
PAR1302
COR13
PAR1401
PAR1402
COR14
PAR1502
PAR1501
COR15
PAR1602
PAR1601
COR16
PAR1701
PAR1702
COR17
PAR1802
PAR1801
COR18
PAR1901 PAR1902
COR19
PAR2001
PAR2002
COR20
PAR2102
PAR2101
COR21
PAR2202 PAR2201
COR22
PAR2301
PAR2302
COR23
PAR2402
PAR2401
COR24
PAR2501 PAR2502
COR25
PAR2601 PAR2602
COR26
PAR2701
PAR2702
COR27
PAR2801 PAR2802
COR28
PAR3102
PAR3101
COR31
PAR3402
PAR3401
COR34
PAR3502PAR3501
COR35
PAR3601 PAR3602
COR36
PAR3701
PAR3702
COR37
PAR3802
PAR3801
COR38
PAR3902
PAR3901
COR39
PAR4002
PAR4001
COR40
PAR4101
PAR4102
COR41
PAR4201
PAR4202
COR42
PAR4302
PAR4301
COR43
PAR4401
PAR4402
COR44
COtb0sch2
PAVO207
PAVO206PAVO205
PAVO204PAVO203
PAVO202PAVO201
PAVO208
PAVO2013
PAVO2012
PAVO2011
PAVO2010
PAVO209
PAVO20E
PAVO20B
PAVO20C
PAVO20S
PAVO20G
PAVO20D
COVO2