Midian SVR-1-KW2 User Manual

SVR-1-KW2

Simplex Repeater Maker

Manual Revision: 2015-11-13

Covers Software Revisions:
VS-1XXX: Rev A 01.31.00 & Higher

This manual & product supports the following radios:
Portables: TK-2170, TK-3170

1

HARDWARE SPECIFICATIONS

Operating Voltage 4.75-9.5 VDC
Operating Current
Power Save Mode (COR Operation) 2.5 mA typical
Power Save Mode (VOX Operation) 10 mA typical
Repeat Operation 17.5 mA typical
Average w/COR Power Save (80-10-10 cycle) <5 mA
Average w/COR Power Save (90-5-5 cycle) <4 mA
Operating Temperature -30 - +60 C
Frequency Response 300-3000 Hz
Input Impedance >45 kΩ
Input Level (TX) 0.05-2.5 VPP
Input Level (RX) 0.05-2.5 VPP
Audio Output Impedance < 1200 Ohm

INSTALLATION OVERVIEW

1. Test the radio for functionality.

2. Program the SVR per the Product Programming Section of this manual.

3. Install the SVR into the radio per the Hardware Installation Section of this manual.

4. Program the radio per the Radio Programming Section of this manual.

*** Midian is not responsible for any damage/loss resulting from the use of Midian’s products.

2

GENERAL INFORMATION

Midian’s SVR-1 is a simplex repeater maker that can be installed into a portable radio. The SVR-1 detects COR
or VOX from an incoming transmission and records the incoming audio (up to 3 minutes). When the COR or VOX
is no longer detected the SVR-1 keys the radio and retransmits the recorded audio. The SVR-1 enables users to
expand radio coverage into poor coverage areas.

3

1B

PRODUCT PROGRAMMING

The SVR series are programmed using Midian’s KL-4F and the MPS software

Go to our website midians.com and under downloads> software download the latest MPS software version. If
using the supplied CD-ROM insert it into the PC’s CD-ROM drive. In the browser that will pop-up, install the MPS
programming software. Be certain that the “Install KL-4 USB Driver” box is checked during the installation
process.

Open Windows’ Control Panel and go to Device Manager.

Open Ports (COM& LPT) to identify the port assignment issued by computer. Plug in the KL4 programmer to the
USB port and the screen will flash and show the device location.

Open the software and choose product from product tree then set appropriate comport selection in the MPS
software as needed

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.

KL-4 Programming: The Yellow and Green KL-4 leads need to be connected to the unit for programming.
Connect the green KL-4 lead to the program in hole (see below), connect the yellow KL-4 lead to the program out
hole (see below) on the unit. The black lead does not need to be connected when using the KL-4. Plug the board
onto the KL-4 p-7 KW2 connector. Push and hold the power button on the KL-4 and wait three seconds, then
click “Program Unit” in the KL-3 software.

KL-4 Reading: The Yellow and Green KL-4 leads need to be connected to the unit for reading. Connect the
green KL-4 lead to the program in hole (see below), connect the yellow KL-4 lead to the program out hole (see
below) on the unit. The black lead does not need to be connected when using the KL-4. Plug the board onto the
KL-4. Push and hold the power button on the KL-4 and wait three seconds, then click “Read Unit” in the KL-3
software.

Program Out

Program In

4

Store on COR/Store on VOX: Select the appropriate method that the unit should use to start recording incoming
audio.

COR Hold-Up Time This sets the amount of times after a loss of COR or VOX that the unit will wait until it
retransmits the recorded audio.

VOX Settings > Sensitivity: This is a threshold detection based on the energy level in the audio.

VOX Settings > Attack Time: This sets the minimum time before the unit will detect VOX based on the sensitivity

setting.

VOX Settings > Decay Time: This sets the time before the unit will drop the VOX detection. Be certain to set this
long enough so that you do not have drop outs between words or on brief pauses.

Beep Options > Power Up: Enables a short beep sequence that takes place immediately after power-up.

Beep Options > Error: This beep may be triggered by any input event if programmed to do so. For example, if a

long press on the Mode Input is not assigned to a function, it may be configured to generate the error beep.

Beep Options > Mode: Not used as the radio offers its own mode tones for the option board enable.

Beep Options > Go Ahead: Not currently used.

Beep Options > Wake Up Beep: Enables a short beep to be sent over the air immediately after PTT is pressed.

Enabling this beep is recommended when the 'Wake on VOX' feature is used. This may also be used to get the
attention of the party receiving a call.

Beep Options > Courtesy Beep: If selected, once the unit is done retransmitting the recorded audio it will
generate a courtesy tone to let others know it is done retransmitting.

Voice Compression: If checked the SVR-1 can store up to a 3-minute voice message. If unchecked the SVR-1
can store up to a 2.25 minute voice message, but with a higher level of audio quality.

5

Power Up In Store/Retransmit Mode: If selected the unit will power up in repeat mode. This box must be
selected if doing repeat enable on a per-channel basis.

Key-Up Delay: This sets the amount of time the unit waits after keying the base station radio before it starts to
retransmit the recorded audio.

Trunking Delay Enable: Check this box if using a trunking system. This will cause the unit to hold off
regenerating the recorded audio until it has received a channel acquisition acknowledgement from the base
station radio.

Common PTT: Check this box if PTT In and Out are connected to the same point.

PTT Cancels Store/Retransmit: If checked and the PTT is pressed during store/retransmit the unit will not

retransmit the incoming transmission.

Number of Retransmits: This sets how many times the unit will retransmit the last recorded audio clip.

Retransmit Interval: This sets the time interval between the retransmits set in the Number of Retransmits field.

6

PTT > Active Polarity: This sets whether the unit looks for an active low or active high to cancel a
store/retransmit.

PTT > Debounce: If checked the unit will require a continuous active state for 30 msec before accepting the PTT.

Mode > Type: Select whether the switch is Momentary or Latched. In this case it should be Latched.

Mode > Active Polarity: Select the active polarity of the mode switch. In this case it should be Low.

Mode > Debounce: If checked the unit will require a continuous active state for 30 msec before accepting the

mode change.

7

COR > Active Polarity: This sets whether the unit looks for an active low or active high to start recording the
received audio.

COR > Debounce: If checked the unit will require a continuous active state for 30 msec before accepting the
COR.

PTT > Active Polarity: This sets the polarity necessary for the unit’s PTT output to key the radio.

Audio Enable > Active Polarity: This sets the polarity necessary for the unit to enable the speaker of the radio to

pass beeps.

8

Tones > Beep Volume: Adjust the slider for the desired beep volume. This level is expressed as a percentage of
max voice audio level.

Tones > Over-The-Air-Signal Modulation: Adjust the slider for the desired beep volume. This level is expressed
as a percentage of max voice audio level.

Playback > Playback Level: This controls the audio level when a stored voice message is played back on the
radio speaker. If voice playback is too low or too loud, adjust this level accordingly.

Playback > Transmit Level: This controls the audio level when a stored voice message is retransmitted over the
air. If the transmit level is too low or too loud, adjust this level accordingly.

9

AUDIO LEVELS ALIGNMENT

Midian recommends using the default programming file, which can be found in (C:\Program
Files\Midian\MPS\MPS_v5_xx\Additional Default Files) after installing the latest MPS software.

This section describes how to determine and set the audio levels.

Audio Levels Overview:

To ensure the best audio quality, the SVR must be configured to match the audio levels used by the radio. The
SVR uses programmable gain amplifiers to accomplish this. Determining the gain settings for these amplifiers is
an involved process, so Midian simplified this process by developing an algorithm that requires the technician to
make only four voltage measurements. From these four measurements, all of the many internal settings are
determined.

Still, getting the best audio quality will likely require a bit of trial and error. The SVR only has control of audio
voltage levels, not input and output impedances. These impedances can dramatically influence the levels.

The Four Voltage Measurements:

An oscilloscope and a communications test set/service monitor are required for the measurements. It is
recommended that the measurements be recorded in units of mV peak-to-peak. Each measurement must be
taken with system modulation at either 60% or 100%, but Midian recommends using 60%

A method for controlling transmit modulation is required for accurate measurements in the TX mode. A small
speaker held in place near the microphone by a rubber band can serve this purpose in most cases. Use a sine­wave generator to inject a 1000 Hz tone into the speaker. Adjust the output of the sine wave generator so that the
transmitter produces 60% of rated modulation while PTT is pressed. Note that if the audio source (such as a
speaker) is moved even slightly, the TX modulation may change significantly. Care must be taken to avoid
changing the TX modulation while taking the measurements.

The first two measurements must be taken using a radio that has not been modified. The 2nd two measurements
require that the SVR is installed and power is applied to the radio/SVR. These measurements must be taken
within 15 seconds of powering the SVR on. This is because the SVR may enter power saving mode after that
time. Measurements made while the SVR is in power saving mode will not be valid. The unit ships with the power
save feature enabled by default. The power save feature can be disabled via the KL-3 programming software so
that it will not interfere with taking measurements, if desired. Please note that the levels provided to the option
board are different between narrow band and wide band.

1. RX Output: The goal of this procedure is to determine the audio level that would normally appear at the RX
audio insertion point in an unmodified radio. With a fully quieting signal modulated with a 1000 Hz tone at
60%. Measure the voltage level appearing at the junction of R-167 and R-169.

2. TX Output: The goal of this procedure is to determine the audio level that would normally appear at the TX
audio insertion point in an unmodified radio. Provide the radio an audio source generating a 1000 Hz tone and
key the radio. Adjust the audio source such that the modulation is at 60%. Measure the voltage level
appearing at R-170 on the radio.

3. RX Input: The goal of this procedure is to determine the audio level that the unit will see at the RX audio
pickup point after it is installed.

The unit must be installed and powered-on while making this measurement. Modulate a 1000 Hz tone at 60%.
Measure the audio level at TP2 on the unit.

4. TX Input: The goal of this procedure is to determine the audio level that the unit will see at the TX audio
pickup point after it is installed.

10

The unit must be installed and powered-on while making this measurement. Provide the radio the same audio

Radio Model

RX In

TX In

RX Out

TX Out

source and level as in Step 2, generating a 1000 Hz tone and key the radio. Measure the audio level at the
TP1 on the unit.

Programming the Audio Levels:

After determining the audio levels at the audio hookup points, it will be necessary to program the SVR to match
these levels. In the programming software, there is a slider control on the Audio Levels Screen for each of the of
four audio hookup points. Locate the column that corresponds to the modulation and units of measurement for
each of the audio hookup points. Adjust the slider bar such that the value appearing in the appropriate column
matches what was measured as closely as possible. Midian recommends the following values based on 60%
modulation:

TK-2170, TK-3170 756 186 786 186

11

HARDWARE INSTALLATION

Be certain to follow standard anti-static procedures when handling any of Midian’s products. Due to the design of
the options connector in the radio it is necessary to install two wires from the SVR-1-KW2 to the Kenwood radio.

PTT: In order to be able to automatically key the radio it is necessary to install a wire from the point shown in the
picture below to a point in the radio as discussed in the installation instructions for the desired model radio.

COR: In order to start recording the SVR-1 can look for COR or VOX. Midian recommends using COR rather than
VOX. COR is not brought up to the options connector so it is necessary to run a wire from the point shown in the
picture above to a point in the radio as discussed in the installation instructions for the desired model radio.

SVR-1-KW2 PTT Pad
Empty pad of R46

SVR-1-KW2 COR Pad

12

Be certain to follow standard anti-static procedures when handling any of Midian’s products.

TK-2170/3170:

This radio requires radio firmware version 1.22.00 (checksum 08C3) or higher.

1. Remove R-170 to open the radio’s TX path and R-167 to open the radio’s RX path.

2. Solder a jumper from pad SP_M in the radio to the COR Input pad on the unit.

3. Plug the unit into the options connector, CN60.

Remove R-167 Remove R-170

Install jumper
from pad SP_M
to the COR pad
on the SVR

4. Solder the PTT wire described on the previous page to the junction of L3 and C28.

13

RADIO PROGRAMMING

TK-2170/3170:

This radio requires KPG-101D v 2.20 or higher for programming.

1. Under the “Model” menu select “Product Information” and set “Optional Board” to “Voice Scrambler”.

2. Under “Edit” “Extended Function” disable the “Echo PTT”.

3. Under the “Edit” menu select “Key Assignment” and set “Side 1” or “Side 2” under the “Top/Side” tab as
“Scrambler”. This will set the button under the PTT as the repeater enable button.

4. If repeat on a per channel basis is desired or a combination of a mode button and per channel, then from the
“Zone Information” screen click on the “Channel Edit” button. Under “Scrambler Setting” enable the “Voice
Scrambler”. For repeat on a per channel basis, this will need to be done for each channel where repeat is
desired. If the box is checked, the radio will power up in repeat mode & when that channel is selected. When
per channel repeat is used, it is still possible to toggle in and out of repeat mode.

14

OPERATION

SVR Operation:

Repeater Enable/Disable: Press the radio key that was assigned in the radio programming. A tone will be

emitted from the radio and the ◊ symbol will appear on the display of the radio indicating repeat mode. If repeat
on a per channel basis is being used, then switching between an enabled or non-enabled channel causes the ◊
symbol to appear or disappear.

Repeat: With the SVR enabled, when the unit detects COR or VOX (depending on programming) it will record the
incoming audio transmission. When COR or VOX drops for a preprogrammed amount of time, the unit will key the
connected transceiver and retransmit the recorded audio.

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.

Button Presses: When the SVR-1-KW2 is enabled and a button on the radio is pressed the radio generates
beeps, which in turn causes the SVR to key the radio and generate the beeps over the air.

MIDIAN CONTACT INFORMATION

Midian Electronics, Inc.

2030 N. Forbes Blvd. #101
Tucson, Arizona 85745 USA

Orders: 1-800-MIDIANS
Phone: [phone] Fax:

520-884-0422

E-mail: [e-mail]
Web: www.midians.com

15

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5

OPT 3

OPT 3

D D

TRUNK DELAY

TRUNK DELAY

+3.3V

R2

D4

47KR247K

R450RR45

SB1D4SB1

+VIN

R37

.1uC3.1u

R1
47KR147K

R37

100K

100K

PAD2

PAD2

R40

R40

100K

100K

C3

R321KR32

TP2TP2

Q7

Q7
NTA4001

NTA4001

TP1TP1

1K

R7
47KR747K

R6

47KR647K

R35*R35

*

COR_IN

R36*R36

COR IN

COR IN

*

C2
560pC2560p

C42

C42

R331KR33

.1u

.1u

1K

+3.3V

TP9TP9

D2
SB1D2SB1

C1

0R

560pC1560p

D5
SB1D5SB1

P1-20

P1-20

MODE IN

MODE IN

P1-7

P1-7

OPT 5

OPT 5

P1-6

P1-6

OPT 6

OPT 6

P1-12

P1-12

C C

TXO

TXO

P1-18

P1-18

RXEO

RXEO

P1-9

P1-9

PTT IN

PTT IN

A_ROUTE

B_ROUTE

R46*R46

*

B B

P1-5

P1-5

N/C

N/C

P1-14

P1-14

N/C

N/C

P1-15

P1-15

N/C

N/C

TP10TP10

A A

+7.5V

+7.5V

GND

GND

P1-2

P1-2

P1-1

P1-1

TP17TP17

C4

560pC4560p

+VIN

C51uC5
1u

5

R15

R15
100K

100K

VR1

VR1

4

1

IN1

RES

OUT

3

ENA

GND
MIC5206

MIC5206

2

VR2

VR2

4

1

IN1

RES

OUT

3

ENA

GND

MIC5206

MIC5206

2

VR3

VR3

4

1

IN1

RES

OUT

3

ENA

GND

MIC5206

MIC5206

2

C47

C47

.22u

.22u

5

5

+3.3VDD

5

R492RR49

2R

R502RR50

2R

R14

R14
100K

100K

+3.3V

+3.3VA

R512RR51

2R

TP13TP13

C7

.1uC7.1u

+3.3VDD

P1-4

P1-4

TRUNK_DLY

+3.3V

R3

47KR347K

TP5TP5

C9

.01uC9.01u

C10

C10
.1u

.1u

D7
SB1D7SB1

PAD7

PAD7

EMER IN

EMER IN

TP6TP6

R13

R13
27K

27K

.0068u

.0068u

.0068u

.0068u

R16

R16

8.2K

8.2K

4

4

C12

C12

.1u

.1u

C15

C15

C16

C16

+3.3V

R39

R39
47K

47K

PAD1

PAD1

R8

4.7KR84.7K

VAN

R9
10KR910K

C14

C14

100p

100p

6

5

D8
SB1D8SB1

R18

R18
56K

56K

-

-

+

+

C17*C17

OPT 1

OPT 1

+3.3V

D6
SB1D6SB1

C13

C13

.1u

.1u

9

10

VAN

13

12

VAN

*

U7B

U7B

LMV324M

LMV324M

P1-3

P1-3

R41

R41
47K

47K

Q8*Q8

*

C11

C11

.0047u

.0047u

R10

R10
10K

10K

-

-

U7C

U7C

+

+

LMV324M

LMV324M

+3.3V

411

-

-

U7D

U7D

+

+

7

R4

47KR447K

R55*R55

*

8

14

LMV324M

LMV324M

VAN

D1
SB1D1SB1

+3.3V

AGND

R19

R19

75K

75K

R21

R21

36K

36K

+3.3V

R11

R11
10K1%

10K1%

R12

R12
10K1%

10K1%

R38

R38
47K

47K

TP11TP11

3

1

TP15TP15

C18

C18
.001u

.001u

11

9

4

3

37

8

18

28

24

27

43

36

46

12

47

20

45

41

+3.3V

U5U5

5

2

3

2

C41

C41
.1u

.1u

R20

1.2M

1.2M

1

6

R20

+3.3V

161342

2

4

+

+

U7A

U7A

-

-

LMV324M

LMV324M

U1U1

40

39

C44

C44
39p

39p

1

3

C40

C40

2.2u

2.2u

31

30

32

33

14

15

5

10

26

23

25

49

29

19

17

35

7

22

21

34

644

48

38

+3.3V

2 5

163

VAN

(SOURCE)

TP8TP8

3

+3.3V +3.3V

R31

R31
47K

47K

1

2

5

6

FACTORY

44

22

33

11

Y1Y1

TP12TP12

R28

R28

4.7K

4.7K

C45

C45
.01u

.01u

C25

C25
.1u

.1u

748

R24

R24

4.7K

U4U4

4.7K

R17*R17

*

TP18TP18

C19

C19
560p

560p

CS

SO

SI

SCK

55

C20

C20

2.2u

2.2u

C46

C46

.1u

.1u

8

VCC

7

HOLD

3

WP

4

GND

U6*U6

*

C39

C39
100p

100p

C38

C38
12p

12p

+3.3V

+3.3VDD

C36

C36
10u

10u

C35

C35
10u

10u

C34

C34
.1u

.1u

C33

C33
.1u

.1u

+3.3V

U3U3

DSP

C27

C27

2.2u

2.2u

TP7TP7

C21

C21

.01u

.01u

+3.3V

R23*R23

*

R22*R22
*

MIDIAN ELECTRONICS, INC.

MIDIAN ELECTRONICS, INC.

MIDIAN ELECTRONICS, INC.

12/16/2007

12/16/2007

12/16/2007

DATE

DATE

DATE

DESIGN

DESIGN

DESIGN

CJS

CJS

CJS

DWN. BY

DWN. BY

DWN. BY

REV.

REV.

REV.

2

+3.3V

R30

R30

4.7K

4.7K

R540RR54

TRUNK_DLY

0R

R42

R42

1.2M

1.2M

COR_IN

R52

R52

4.7K

4.7K

+3.3VA

L10RL1
0R

A_ROUTE

C31

C31

C32

.1u

.1u

C30

C30
.1u

.1u

C29

C29
.1u

.1u

C28

C28
.1u

.1u

C32
10u

10u

AGND

C37

C37
560p

560p

B_ROUTE

FACTORY

C26

C26

2.2u

2.2u

NOTES:

* = NOT INSTALLED

VS-1200

VS-1200

VS-1200
KW2

KW2

KW2

SIZE

SIZE

AS

AS

AS

07/04/2008 Copyright © 2008

07/04/2008 Copyright © 2008

07/04/2008 Copyright © 2008

2

SIZE

C

C

C

SCHEMATICAPPR.

SCHEMATICAPPR.

SCHEMATICAPPR.

PAD3

PAD3

PAD4

PAD4

PROG IN

PROG IN

D9

SB1D9SB1

D11

D11
SB1

SB1

PROG OUT

PROG OUT

C48

C48
.1u

.1u

R530RR53

0R

D10

D10
SB1

SB1

Q6

Q6
NTA4001

NTA4001

R261KR26

1K

R251KR25

1K

C23

C23

.1u

.1u

PAD8PAD8

C22

C22
.1u

.1u

R43*R43

R44*R44

1

*

*

PAD6

PAD6

AUDIO ENH

AUDIO ENH

R48*R48

R470RR47

0R

C43

C43
560p

560p

TP3TP3

REV

REV

REV

A-1

A-1

A-1

SHEET

SHEET

SHEET

1 1

1 1

1 1

1

*

of

of

of

P1-10

P1-10

PROG IN

PROG IN

P1-11

P1-11

PROG OUT

PROG OUT

P1-16

P1-16

SIDE TONE

SIDE TONE

P1-13P1-13

P1-8

P1-8

PTT OUT

PTT OUT

P1-17

P1-17

TXI

TXI

C24

C24
220p

220p

TP4TP4

P1-19

P1-19

RXEI

RXEI

FILE NAME

FILE NAME

FILE NAME

sch_509_A1

sch_509_A1

sch_509_A1

DOCUMENT NUMBER

DOCUMENT NUMBER

DOCUMENT NUMBER

509-A-1

509-A-1

509-A-1

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