Midian Electronics VTE-1 User manual

1
VTE-1
Voting Tone Encoder
Manual Revision: 2011-08-26
Covers Loader Firmware Revisions:
1.70 & Higher
Covers Application Firmware Revisions:
1.40 & Higher
Covers PCB Revisions:
F

2
TABLE OF CONTENTS
Specifications 3
General Information 4
Hardware Installation 5
Hardware Alignment 6
Jumper Settings 7
Controls & Indicators 8
Operation 8
Theory of Operation 9
Technical Notes 10
Contact Information 10

3
SPECIFICATIONS
Voltage/Current:
Operating Voltage: 13-18 VDC
Operating Current (standby): 125 mA
LED Current: 4 mA
Fuse Protection Auto Resettable with surge suppression: 300 mA
RX Input from Radio:
Frequency Range: 300-3000 Hz
Notch Filter Depth: 45 db relative to 1 KHz
Dynamic Range 30 dB
COR Input Logic Low
Dedicated Phone Line:
Output Level -20 to +10 dB pot adjustable
Output Impedance 600 Ohm
Fuse Protection Auto Resettable with surge suppression: 300 mA
Mechanical:
Dimensions: 1.45" H x 6” W x 7.6" L
Operating Temp: 0° to +50° C
Default Pilot Tone Frequencies:
1950 Hz (default)
2175 Hz
2700 Hz
1600 Hz
No Tone (for auxiliary receivers)

4
GENERAL INFORMATION
Midian Electronics’ VTE-1, voting tone encoder (also known as a pilot tone generator or status tone generator)
with a 600-ohm line driver, pairs with a radio receiver to create an analog satellite voting receiver or auxiliary
receiver. Satellite voting receivers are spread out over a geographic area to provide greater radio coverage and
are connected via a dedicated line, telemetry link or microwave to a voting comparator. The voting comparator
looks at the signal to noise ratio from multiple voting receivers and passes the best quality signal to the
dispatcher/repeater.
The VTE-1 looks at the COR coming from the receiver. When COR is inactive the VTE-1 generates a voting tone
to the voting comparator. This tone is selectable as 1950 Hz, 2175 Hz, 1600 Hz or 2700 Hz. Custom tones can
also be ordered from Midian. When the receiver’s COR is active the tone is no longer generated and the audio
from the radio is sent to the voting comparator.
Midian’s VTE-1 is compatible with the following types of voting systems:
Motorola Spectra-TAC
JPS Communications (Raytheon) SNV-12
GE Mastr II
RF Technologies Eclipse
Other systems using 1950 Hz, 2175 Hz, 1600 Hz or 2700 Hz as the voting tone.

5
HARDWARE INSTALLATION
Be certain to follow standard anti-static procedures when handling any of Midian’s products.
Getting Started:
The VTE-1 has a number of adjustment potentiometers and configuration jumpers. These have been adjusted
and configured at the factory for a typical installation. However, audio levels should be verified and adjusted (if
necessary) at the time of installation. Also, the configuration jumpers should be inspected prior to installation to
verify that they are in the right configuration. Jumper descriptions appear in the jumper settings section with a
quick reference table.
Line Interface
The line interface connector CON7 is a 10-pin RJ-45 style connector on the left side of the back panel.
2-Wire Operation: For a 2-wire installation, simply connect pins 5 and 6 (red and green) to the dedicated line. A
standard 4 conductor phone cable will function properly in connector CON7. See table 3.1.
Table 3.1
Pin Color 2-Wire
CON7-4 Black Not Used
CON7-5 Red Line 1
CON7-6 Green Line 1
CON7-7 Yellow Not Used
Radio Interface:
CON6 is located in the middle of the back panel and is used to connect the VTE-1 to the satellite or auxiliary
receiver. The following are the connection points:
CON6:
CON6-2 (Orange): COR: Connect this lead to the busy detect of the radio. This input is used to control whether
audio should be passed down the line to the voting comparator or generate the pilot tone.
CON6-6 (Red): Battery (13-18 VDC): Connect this lead to 13-18 VDC from the base station/repeater.
CON6-7 (Black): Ground: Connect this lead to the base station’s or repeater’s ground.
CON6-8 (White): RX Input: Connect to the receive audio in the satellite or auxiliary receiver after the sub-audible
hi-pass filter and at some point that gives flat audio to the VTE-1. Speaker audio is fine if it is single ended, but
make certain the volume control cannot be turned down accidentally.
Diagram 3.1
1

6
HARDWARE ALIGNMENT
The alignments are preset at the factory and should not need to be adjusted during installation. However, if an
adjustment is needed please follow the procedures below.
RX Input Line Level Adjustment:
1. With voice being received from the base station adjust RP3 while monitoring TP1 with an oscilloscope, so that TP1
shows around 700 mV p-p. Also verify that JP22 Pin 2 shows around 180 mV p-p.
RX Output Line Level Adjustment:
1. With voice being received from the base station adjust RP6 while monitoring the line out with a line level meter and
set for approximately -10 dB on average voice or -5 dB on peak voice.
Pilot Tone Level Adjustment:
1. Prior to performing this step, the line level adjustments above must be done. Set RP2 to the desired dB level (-20 to
+10 dB). Setting the COR Input of the VTE-1 to the inactive state (logic high) will cause the unit to generate the
Pilot Tone.
Note: If a line level meter is not available for the level adjustment use an AC voltmeter with a DB scale. A voltmeter
would not be set up for balanced 600 ohm audio, but it will provide a close measurement.

7
JUMPER SETTINGS
The following table shows the default jumper settings and their function:
Jumper
Number Default Position Description
JP21 1-2 In – 2-3 Out De-Emphasis jumper
JP36 1-2 In Termination jumper
JP40 1-2 In Termination jumper
JP41 1-2 Out 2175 Hz Pilot Tone Select
JP42 1-2 In 1950 Hz Pilot Tone Select
JP43 1-2 Out 2700 Hz Pilot Tone Select
JP44 1-2 Out 1600 Hz Pilot Tone Select
JP41-JP44 All Out No Pilot Tone

8
CONTROLS & INDICATORS
Power LED: This red LED indicates that power is applied to the unit through the rear connector.
COR/MON LED: This red LED indicates carrier is detected from the receiver.
Tone LED: This red LED indicates the Pilot Tone is being generated.
OPERATION
Voting Tone Encode: When COR is inactive from the receiver to the VTE-1, the unit will generate the selected
Pilot Tone to the voting comparator.
Receive: When COR is active from the receiver to the VTE-1, the unit will pass the voice from the receiver to the
voting comparator.

9
THEORY OF OPERATION
RX Voice Path:
RX audio from the base station goes through hipass filter C39 and RP3. RP3 also serves as the RX input level
adjustment pot. This audio is then fed into audio amplifier U8:2 which acts as low pass filter for noise above 3
KHz and if jumper JP21 is installed it can provide a 6 dB per octave de-emphasis if desired.
Audio from U8:2 is fed to C56. Voice audio is input into the audio mixer U8:4. The mixer audio is then input into
the line amplifier (U20:3) which drives T1. The line amplifier has an enable transistor that is controlled by the
microprocessor. The micro can respond to the COR carrier input and enable this amplifier. Pilot Tone is injected
into the audio path at C-59 PWM input.
Power Supply:
13-18 VDC is input on the red wire of the Radio Interface connector and then into RF inductor L7 into an auto-
resettable polyswitch. D22 is a polarity protection diode that is designed to pop the resettable fuse if power is
hooked up backwards. C31 and C34 act as RF bypass caps after the RF inductor L7. U6 acts as a 12 VDC
regulator. Its output is fed to all of the analog circuitry and U14:2 acts a pseudo-ground reference at
approximately 6 VDC. The 12 VDC on the analog page schematic is also fed over to U4 which is a 5 VDC
regulator shown on the digital page to run the microprocessor and the optional encoders/decodes and serial
chips. The relays on the digital page receive their 12 VDC from the 12 VDC regulator. They are driven by open-
collector transistors to protect the microprocessor from the 12 VDC.

10
TECHNICAL NOTES
No technical notes are available at this time.
MIDIAN CONTACT INFORMATION
Midian Electronics Inc.
2302 East 22nd Street
Tucson, Arizona 85713 USA
Orders: 1-800-MIDIANS
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.midians.com

1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
SJ10
SJ7
10K
R210
*
R235
1K
R39
1K
R69
10K
R40
100K
R305
16.0M
Y2
100K
R115
100K
R287
4
560p
C20
2.2K
R230
1K
R63
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22p
C131
100K
R226
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R214
1K
R292
1K
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3
5
6
10
8
7
12
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10
8
7
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1K
R293
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C133
1K
R295
PAD1
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R136
100K
R26
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1K
R294
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C155
100K
R224
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R38
4.7K
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1K
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C2
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TXD0
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PA1
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PA2
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PA3
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PE5
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PE3
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PAD05
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PT6
13
PB5
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PP1
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PT7
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PB0
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PB1
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PAD02
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PA4 45
PP0
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PP5
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PAD03
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PT0
5
RXD0
63
PT2 7
RXD1 65
TXD1 66
PAD00
51
VSSR
28
PT1
6
PA0
41
PB2
18
PB3
19
RESET 30
PB6 22
PE6
25
PB7
23
PP2
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PP7
78
PE7
24
PAD01
52
PE4
27
PP4 80
PE1
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PAD06
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PT3 8
PT5
12
PA6 47
PA7 48
PE0 40
PE2
38
PM0 75
PM1 74
PM2 73
PM3 72
PM4 71
PM5 70
PJ6 69
PJ7 68
VSSPLL
33
TEST
36
VSS1
10
VSS2
50
VSSA
62
VSSX
76
VDDA 59
VREGEN 67
VDDX 77
XFC
32
VDDPLL
31
VDD2
49
VDD1
9
PAD07
58
BKGD 15
PT4
11
VRL
61
VRH
60
PAD04 55
16
4.7K
R14
1K
R67
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C145
100K
R222
1
2
3
4
5
6
7
8
9
10
SEE DOC MENT 7053-INTFCABLE
FOR WIRE COLOR DESIGNATIONS
RJ45-10
CON2
560p
C26
3.58MHz
Y1
1K
R229
SJ12
RJ45-10
1
2
3
4
5
6
7
8
9
10
SEE DOC MENT 7503-INTFCABLE
FOR WIRE COLOR DESGINATIONS
CON3
1K
R61
560p
C23
1.2M
R7
.1u
C132
1K
R43
100K
R24
.22u
C138
100K
R52
100K
R113
BSS
Q11
BSS
Q9
100K
R291
1K
R37
4.7K
R48
6
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C27
.1u
C146
.47u
C4
11
2233
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3
5
6
10
8
7
12
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DF2E-DC12V
560p
C24
BSS
Q15
100K
R28
2
2.2K
R18
100K
R114
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C147
5
1K
R57
100K
R225
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2.2K
R164
1K
R71
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*
C135
.47u
C84
0R
R219
2954IM
RESET 5
O T1 1
O T2 2
GND 4
IN1
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IN2
3
IC1
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IC2
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4
100K
R30
1K
R45
4.7K
R53
1K
R65
100K
R285
B25
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2.2K
R17
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RJ45-10
1
2
3
4
5
6
7
8
9
10
CON6
BSS
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10K
R50
4.7K
R42
100K
R6
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C137
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1K
R59
560p
C21
*
C10
1K
R5
100K
R54
1K
R135
NOTE7
T1_IN 11
R1_O T 12
T1_O T
14
R1_IN
13
C1+ 1
C1- 3
C2+
4
C2-
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VCC
16
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GND 15
R2_IN
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T2_O T
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R2_O T 9
17
100K
R223
*
C9
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VCC 20
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GND
10
STD 17
Q1 12
Q2 13
Q3 14
Q4 15
TOE 11
NC1
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NC2
16
1
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R25
560p
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SJ9
560p
C19
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11
22
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10K
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22K
R51
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R12
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1K
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5
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J2
470K
R8
SJ8
1
JP31
BSS
Q34
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+12V
+12V
+12V
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+5V
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+5V
+5V
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+5V
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+5V
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+5V
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+5V
TX_MOD_INP T
VOX
ANTIVOX
D PLEX_PARALLEL_CROSSOVER
G ARD_HOLD_TONE
F NCTION_TONE
RX_LINE_ENABLE_DISABLE
TELCO_RECV_M TE
TX_O TP T_ENABLE_DISABLE
TX_IN_ENABLE_DISABLE
PWM_VOICE
DTMF_DECODER_2
RING
SCR_MODE_IN
RX_INP T
+13_TO_18_VDC
HOOK
SCR_OFF_HOOK
SCR_PTT_IN
TELCO_FEEDBACK_DISABLE
+5V
SCR_COR
SCR_MODE_O T
HLG_DET
DTMF_DECODER_1
TELEMETRY_PTT
PTT
MONITOR
F1
F2
COR
SPARE
RADIO
INTERFACE
PROG_IN
PROG_O T
OPTIONAL
DTMF ENCODER/
DECODER
F1/F2
LOCATED ON
ANALOG PAGE
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-
+
-
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FOR WIRE COLOR DESIGNATIONS
OPTIONAL
SERIAL INTERFACE
F1
PTT
F2
MONITOR
COR
SPARE
RXD
TXD
RX IN
TX O T
RELAYS
TTC-1 ONLY
470K
R1
1M
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F13 LED
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D28
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100KR314
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D32:1
3 1
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D32:2
F3 LED
D14
F4 LED
D15
F5 LED
D16
F6 LED
D17
F7 LED
D18
F8 LED
D19
F9 LED
D20
F10 LED
D21
HOOK LED
D4
TRANSMIT LED
D6
RING LED
D7
SYNC/TONE LED
D10
MONITOR/
CARRIER LED
D9
F1 LED
D11
F2 LED
D13
DTMF LED
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JP9
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JP4
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1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
GND POWER
GND POWER
ALL J MPERS
NOT INSTALLED NLESS SPECIFIED
ALL O T = NO TONE
JP41 = 2175Hz
JP42 = 1950Hz
JP43 = 2700Hz
JP44 = 1600Hz
* = NOT INSTALLED
62K
R257
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C199
10K
R349
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100K
R328
BSS
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100K
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-
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31
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-
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57
19:2
LM324 1K
RP1
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PWM_2175
TP13
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12
14 19:4
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10
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LM324
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R327
100K
R330
BSS
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47K
R23
47K
R22
47K
R21
47K
R20 100K
R348
100K
R347
*
R338
100K
R331
+5V
10K
R333 .47u
C198
*
R336
100K
R335
*
R334
+5V
*
R332
BSS
Q41 100K
R339
4.7K
R345
4.7K
R344
4.7K
R342
4.7K
R341
4.7K
R340
4.7K
R321
4.7K
R322
4.7K
R324
4.7K
R325
.012µ
C190
.0047µ
C186
.0047µ
C192
.0033µ
C196
.0033µ
C189
100
R343
.033µ
C194
100
R323
.033µ
C187
560R
R326
10u
C154
10u
C160
ADC INP T
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PAD10
F T RE SE
PAD4
F T RE SE
PAD5
F T RE SE
PAD6
F T RE SE
PAD8
ADC INP T
F T RE SE
PAD9
.015µ
C185
.033µ
C188
.015µ
C191
.033µ
C195
2.2u
C29
2R
R356
10u
C148
.012µ
C201
0R
R360
PWM_VOICE_1
.1u
C8
SD1D36
SD1D35
SD1D37
SD1D38
SD1D39
SD1D40
SD1D41
SD1D42
560R
R346
0R
R361

1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
.001u
C71
IND CTOR
L2
51R
R172
.001u
2KV
C169
1
TTC OPTION G
TTC OPTION H
VOICE SCRAMBLER
CON1
100K
R206
-
+
6
57
18:2
LM660
TP17
.1u
C157
.1u
C128
.47u
C175
-
+
2
31
411
8:1
LM324
.01u
C99
TP8
SPARE
PAD3
0R
R288
100K
R91
-
+
9
10
811:3
LMC6036
SA572
RECT_IN
3
ATK_CAP
4
G_O T
5
THD_TRIM
6
VCC 16
GND 8
REC_CAP 2
G_IN 7
TRK_TRIM
1
7:1
300 mA Resettable Fuse
OPTION J
F4
100K
R83
10
10K1%
R177
47p
C77
470R
R133
-
+
13
12
14 14:4
LM324
51R
R252
10K
R131
33K
R88
100K
R98
-
+
6
5
711:2
LMC6036
10K
R96
10K1%
R174
P3100
OPTION C
TZ5
IND CTOR
L6
.47u
C85
.1u
C121
TP6
1K
R261
2
TP3
*
R218
B25
Q33
22K
R279
P0300
OPTION J
TZ9
1K
RP3
1K
R260 10K1%
R173
-
+
6
5
710:2
LM324
1u
C103
2.2K
R254
*
R298
4.7K
R156
3.3K
R242
LM4950
SH TDOWN
2
BYPASS
8
GND TAB 5
GND 4
VDD 6
20:2
.047u
C97
B25
Q22
100K
RP15
1u
C61
100K
R139
15K
R149
0R
R101
4.7K
R128
25
36K
R282
.22u
C113
TP19
*
R297
470K
R142
.47u
C39
.001u
2KV
C165
10K1%
R237
2.2K
R171
10K1%
R166
0R
R189
620R
R151
SA572
RECT_IN 13
ATK_CAP 12
G_O T 11
THD_TRIM 10
VCC
16
GND
8
REC_CAP
14
G_IN
9
TRK_TRIM 15
7:2
47K
R144
.22u
C55
9.1K
R73
100K
R284
.47u
C73
1K
R153
10K
R198
RJ11-4
1
2
3
4
BLK
RED
GRN
YEL
POTS
CON4
.1u
C126
.01u NPO
C156
470u
+C32
TP7
100K
R276
-
+
2
31
411
14:1
LM324
IND CTOR
L7
.47u
C162
330K
R125
.1u
C104
IND CTOR
L1
*
R290
300 mA Resettable Fuse
OPTION C
F6
200K
R275
47K
R99
TP11
3
100p
C114
TP9
IND CTOR
L5
BSS
Q20
10K1%
R250
10K1%
R247
P0300
TZ4
.047u
C96
47u
+C51
39K
R273
1
J1
EARTH CHASSIS GRO ND
.22u
C88
5K
RP4
*
Q35
10K
RP11
330K
R85
470K
R191
.001u
2KV
C168
10K1%
R248
300 mA Resettable Fuse
OPTION C
F3
56K
R100
1.2M
R188
0R
R281
3.3K
R238
12
*
C64
120K
R148
330K
R126
750K
R192
*
R296
5K
RP10
43K
R121
.1u
C47
.22u
C40
7.5K
R263
10K
R180
-
+
9
10
814:3
LM324
.022u
C59
1.8M
R186
10K1%
R179
47K
R167
4
P0300
OPTION J
TZ8
10K1%
R178
10R
R278
470R
R255
Y25
Q29
100p
C50
0R
R184
TP4
1K
R107
-
+
6
5
712:2
LM324
-
+
6
5
7
LM324
14:2
-
+
6
5
715:2
LM660
1K
R162
.033u
C171
BSS
Q18
1K
RP6
.001u
C125
-
+
9
10
810:3
LM324
-
+
13
12 14
8:4
LM324
10K1%
R246
BSS
Q25
1u
C101
1K
R86
TP5
13
10K
R221
1K
R233
.47u
C158
.1u
C177
-
+
2
3
1
411
10:1
LM324
1M
RP17
1K
R264
.01u
C75
470K
R280
TP20
.47u
C60
100K
R108
10K1%
R170
*
C100
*
C76
150p
C139
5
.47u
C107
47K
R120
*
R304
1K
R259
SJ13
TP22
P0300
TZ3
100K
R134
TP21
.47u
C106
24K
R145
.001u
C124
1K
R124
6.8K
R95
.1u
C98
300 mA Resettable Fuse
F2
IND CTOR
L4
300 mA Resettable Fuse
F5
LM4950
-
97
20:3
LM4950
-
13
20:1
1K
RP9
-
+
2
3
1
411
11:1
LMC6036
4.7K
R150
-
+
9
10
815:3
LM660
4.7K
R143
26
.001u
C42
-
+
2
3
1
411
12:1
LM324
1.2M
R183
*
C179
TP14
.01u
C93
15K
R147
.1u
C127
10K
R89
390K
R187
10K
R97
*
R243
.01u
C176
1.8M
R181
.001u
2KV
C167
100p
C86
10K
R90
330R
R231
JP34
-
+
2
3
1
411
15:1
LM660
47K
R76
10K
R72
P3100
OPTION C
TZ7
10K1%
R165
TP18
6
BSS
Q27
-
+
13
12
14 11:4
LMC6036
-
+
2
31
411
18:1
LM660
*
R303
P S
1 6
5
3 4
2
42T 016RC
T1
-
+
9
10 8
8:3
LM324
330R
R234
1K
RP5
470u
+C174
22K
R116
4.7K
R117
10K1%
R245
10K
RP13
100p
C43
1K
R81
BSS
Q17
-
+
13
12 14
18:4
LM660
29
.001u
C111
47K
R137
P S
1 6
5
3 4
2
OPTION J
T2
1K
R251
1u
C48
.22u
C159
*
TZ1
1N4001
D22
0R
R241
150R
R141
10K
R220
1M
R129
330R
R289
7
8.2K
R160
1K
R265
.001u
2KV
C170
.47u
C150
*
C102
10K1%
R169
10K
RP12
10K
R197
22K
R127
1M
RP16
560p
C37
33K
R176
P0300
TZ2
.1u
C36
10K
R74
330R
R211
10K1%
R239
-
+
6
57
8:2
LM324
TP2
33K
R193
.001u
C110
300 mA Resettable Fuse
F1
47K
R130
Y25
Q28
22K
R152
30
BSS
Q30
TP15
470K
R140
560p
C94
IND CTOR
L3
10K
R82
RJ45-10
1
2
3
4
5
6
7
8
9
10
CON7
MIC2940A
VIN
1
GND
2
VO T 3
6
100K
R283
430K
R123
21
3
S1
SJ14
3.3K
R84
P3100
OPTION C
TZ6
3.9K
R138
390K
R182
.1u
C49
22
CH1847
OPTION C
TIP 1
RING 2
XMIT(-)
7
RCV
6
VCC 8
GND
10
RI
5
OFFHK
4
XMIT(+)
9
13
1u
C52
100K
R277
.1u
C161
33K
R249
100K
R155
22K
R154
43K
R132
100K
RP8
47K
R194
47K
R119
.22u
C89
1M
R146
TP10
JP35
-
+
9
10 8
18:3
LM660
5K
RP7
.001u
C72
-
+
13
12
14 10:4
LM324
1000p NPO
C79
47u
+C115
.1u
C129
23
P0300
OPTION J
TZ10
0R
R307
100K
R87
1K
R232
10K
R262
.001u
2KV
C166
0R
R244
-
+
13
12
14 12:4
LM324
30K
R240
TP1
330R
R106
-
+
13
12
14 15:4
LM660
B25
Q23
.47u
C153
1u
C53
.47u
C108
9
300mA Resettable Fuse
OPTION J
F7
.1u
C109
.1u
C163
62K
R274
-
+
9
10
812:3
LM324
30K
R175
1M
R190
1M
R118
0R
R209
560K
R185
10K1%
R253
1K
R256
VAN_A
+12V
VAN_A
VAN_A
+5V
+5V
+5V
+5V
+12V
+12V
VAN_A
VAN_A
+12V
+12V
VAN_A
+5V
+5V
VAN_A
VAN_A
VAN_A
+12V
+12V
VAN_A
+12V
VAN_A
VAN_A
+12V
+12V
VAN_A
VAN_A
+12V
VAN_A
VAN_A
VAN_A
VAN_A
VAN_A
+12V
VAN_A
+5V
VAN_A
+12V
+12V
+5V
VAN_A
+VIN
+VIN
RX_LINE_ENABLE_DISABLE
ANTIVOX
VOX
PWM_VOICE
D PLEX_PARALLEL_CROSSOVER
RX_INP T
F NCTION_TONE
G ARD_HOLD_TONE
DTMF_DECODER_1
TELCO_RECV_M TE
TX_O TP T_ENABLE_DISABLE
PWM_VOICE
DTMF_DECODER_2
TX_IN_ENABLE_DISABLE
+13_TO_18_VDC
RING
HOOK
SCR_TX_IN
SCR_TX_O T
SCR_TX_IN
SCR_TX_O T
SCR_RX_IN
SCR_RX_O T
SCR_RX_O T
SCR_RX_IN
SCR_MODE_IN
SCR_PTT_IN
TELCO_FEEDBACK_DISABLE
SCR_OFF_HOOK
TX_MOD_INP T
SCR_COR
SCR_MODE_O T
HLG_DET
G ARD_F NCTION
G ARD_F NCTION
TELEMETRY_PTT
OPTIONAL 4 WIRE TX ONLY
6 VOLTS
ANALOG REFERENCE
RX LINE AMPRX
LINE
LEVEL
A DIO MIXER
COMPANDOR
RX INP T
LEVEL
TX AMP
3 KC LOWPASS
300 Hz HIGHPASS
TX O TP T
LEVEL
G ARD/HOLD TONE NOTCH/
G ARD/HOLD TONE DETECTION
F NCTION TONE DETECTION
BANDPASS FILTER
MOBILE PRIORITY
TELCO PTT
G ARD/HOLD TONE BANDPASS FILTER
TTC-1 POTS OPTION
BASE
STATION
BASE
STATION
COMPANDOR
G ARD/HOLD TONE
NOTCH N LL
D PLEX
CROSSOVER
LEVEL
SEE MC PAGE
SEE MC PAGE
RX NOTCH BANDPASS T NING
2000 TO 3100 HZ.
TX NOTCH BANDPASS T NING
(0805) (0805)
(M LTIT RN)
(1206)
(0805)
2000 TO 3100 HZ.
(0805) (0805)
(0805)
(1206)
(M LTIT RN)
2 WIRE RX/TX
4 WIRE RX ONLY
2000 TO 3100 HZ.
approx. 700mvp-p
180mvpp@1Kc 400mvpp
approx. 8.8Vpp@1Kc
Transmitting to Remotes at -10 db
TP4 should be approx 540mvp-p.
Approx. 1.2Vpp
@-20dbm
Low Lvl Guard -
RP13 at center
MICROWAVE (M LEAD)
TELEMETRY RADIO RECV A DIO
TELEMETRY RADIO MOD LATION
TTC-1 TELEMETRY RADIO OPTION
TELEMETRY RADIO OPTIONAL
approx.
@1Kc
220mvpp@-20dbm
Low Lvl Guard
Approx 1Vpp@-20dbm
LowLvl Guard
TP6 Approx 600mvpp
@-20dbm
Low Lvl Guard
Approx 750mvpp
@-20dbm@1Kc
Approx 3.7Vpp
@-10dbm@1Kc
RP8 at center
TP6 Approx 5.8Vpp
@+10dbm
High Lvl Guard
TP21 Approx 1V
Middle
High Lvl Guard
+5V
.1u
C119
0R
R272
.1u
C118
330K
R203
3.3K
R200
1K
R199
100K
R201
33K
R202
.1u
C117
1u
C116
.001u
C34
560p
C31
.47u
C151
.47u
C152
TTC-1 ONLY
RX
LINE
LEVEL
75K
R268
100K
R205
750K
R204
15K
R207
15K
R208
.47u
C122
.1u
C123
68p
C120
.001u
C180
.01u
C178
820p
C63
47p
C172
ihs7503f1_vte1
CJS
2005-01-17 GPC
2010-10-18
F1
2 of 2 7503
MIDIA ELEC ROICS, IC.
DA E:
DESIG:
DW BY:
REV:
APPR SCHEMA IC
COPYRIGH © 2009
REV
SHEE PROJEC UMBER
DOCUME AME
V E-1
47K
R308
.22u
C181
1K
R309
21 A7
D24:1
31 A7
D24:2
31 A7
D23:2
21 A7
D23:1
SD1
D34
*
D33
11
22
33
JP27
11
22
33
JP26
(
((
(
11
22
33
JP22
J MPER
11 22 33
HI-Z J MP 1&2
LO-Z J MP 2&3
LO-Z HI-Z
JP25
11
22
JP36
11
22
)
))
)JP40
11
22
JP37
11
22
JP38
1K
R310
1K
R311
NetC171_1
NetR81_1
NetR145_2
0R
R312
470p
C183
* = NOT INSTALLED
WIRE
)
) )
)
11 22 33
JP45
1u
C182
10K
R353
100K
R355
BSS
Q40
SECONDARY_RX_LINE_EN_DE
0R
R350
TP23
TP16
VOICE_STORE 10K
R354
.47u
C184
PWM_2175
0R
R351
4.7u
C35
4.7u
C38
4.7u
C44
10u
C112
10u
C54
10u
C69
10u
C173
2R
R352
2.2u
C56
J MPER NO
RX AMP
3 KC LOPASS SHORT SJ15
OR DE-EMPHASIS OPEN SJ15
SJ15
2.2u
C87
1u
C200
.001u
C202
560p
C203
IND CTOR
L8
0R
R358
0R
R357
10K
R94
.47u
C58
PWM_VOICE_1
1000p NPO
C81
SB1
D25