Hamtronix Elektra 2000 User manual

Hamtronix
Repeater Controller
Elektra 2000
Instruction Manual
Software V2.10
Hardware Revision H

ELEKTRA 2000 Hamtronix
1
Technical Support.........................................................................................................................................02
Precautions..................................................................................................................................................02
Warranty.....................................................................................................................................................02
Software Update ..........................................................................................................................................02
CONNECTORS
CN1 - RPT ...................................................................................................................................................03
CN2 - LINK ..................................................................................................................................................03
CN3 - REMOTE .............................................................................................................................................03
Connector Pin out.........................................................................................................................................03
INSTALATION
Determining COR Logic .................................................................................................................................04
Active High COR...........................................................................................................................................04
Active Low COR............................................................................................................................................04
Audio Quality ...............................................................................................................................................04
Wiring and Test............................................................................................................................................05
Audio Adjusts ..............................................................................................................................................05
LEDs...........................................................................................................................................................05
Fan Control Output .......................................................................................................................................05
Audio Equalization ........................................................................................................................................05
Quick Reference ..........................................................................................................................................06
Conventions Followed In This Manual..............................................................................................................06
BASIC OPERATION
Remote Controlling ......................................................................................................................................07
Commands Syntax .......................................................................................................................................07
FUNCTIONS DESCRIPITION
[01] Repeater Transmitter Enable ..................................................................................................................08
[02] Transmitter Hang Time .........................................................................................................................08
[03] Time to Courtesy Tone ..........................................................................................................................08
[04] Courtesy Tone Duration .........................................................................................................................08
[05] Courtesy Tone Frequency ......................................................................................................................08
[06] Courtesy Tone Type...............................................................................................................................08
[07] Roller Beep...........................................................................................................................................09
[08] Confirmation Tone.................................................................................................................................09
[09] Time-out Action ...................................................................................................................................09
[10] ID Test ................................................................................................................................................09
[11] Repeater CTCSS Enable .........................................................................................................................09
[11] Link CTCSS Enable ................................................................................................................................09
[14] ID Timer ..............................................................................................................................................09
[15] ID Selection..........................................................................................................................................10
[16] CW ID Frequency ..................................................................................................................................10
[17] CW Speed ............................................................................................................................................10
[18] CW ID Setup ........................................................................................................................................10
[19] Voice ID Message Recording...................................................................................................................11
[20] Alarm Input ..........................................................................................................................................11
[21] Monitor Input........................................................................................................................................11
[22] Repeater Port .......................................................................................................................................11
[23] Link Port (Auxiliary, Control, Link e Cross) ...............................................................................................11
[24] Transmission Test .................................................................................................................................11
[25] Simplex Repeater..................................................................................................................................12
[26] Repeater Timer-out ...............................................................................................................................12
[27] Output 1 .............................................................................................................................................12
[28] Output 2 .............................................................................................................................................12
[29] Output 3 .............................................................................................................................................12
[30] Output 4 .............................................................................................................................................12
[31] Output 5 .............................................................................................................................................12
[32] Output 6 .............................................................................................................................................12
[33] Repeater DTMF Control Enable................................................................................................................12
[34] Repeater DTMF Mute Enable ...................................................................................................................12
[35] Password Setup ....................................................................................................................................12
[36] RESET..................................................................................................................................................13
[37] Remote FULL RESET ..............................................................................................................................13
[38] Voice Recorder Lock ..............................................................................................................................13
[39] Multi-Function Button ............................................................................................................................13
[40] Voice Messages Duration........................................................................................................................13
[41] Voice ID Priority....................................................................................................................................13
[42] Super User Mode...................................................................................................................................13
[43] Tone Editor...........................................................................................................................................13
Master RESET and FULL RESET (button)..........................................................................................................14
Contact and Service......................................................................................................................................14

ELEKTRA 2000 Hamtronix
2
TECHNICAL SUPPORT
If any doubt remains after a complete reading of this manual, visit
our web site. You will find last minute information and an FAQ
section with answers to frequent questions.
You can get support by phone or e-mail:
supp[email protected]
Questions by e-mail usually answered in less than 24 hours.
PRECAUTIONS
Please observe the following precaution to prevent radio equipment and controller damage:
Verify the correct polarity of the power source. Incorrect polarity may destroy the board.
Do not modify controller circuits unless instructed by this manual or by Hamtronix
documentation.
Do not place the controller in excessively dusty areas, humid areas, wet areas, nor on unstable
surfaces that may cause short-circuits.
If abnormal odor or smoke is detected coming from the board, turn off the power immediately.
Contact Hamtronix for support and service.
LIMITED WARRANTY
This Warranty covers all defects in materials and workmanship in Hamtronix boards for the original
purchaser. This Warranty will remain in effect for one (1) year from the date of purchase. This Warranty
do not covers damage, deterioration or failure resulting from:
1) Accident, misuse, abuse, neglect, unauthorized product modification or failure to follow
instruction contained in manual.
2) Water or other elements.
3) Repair or attempted repair by anyone not authorized by Hamtronix.
4) Any unit which is not new when sold to the first end user or upon which the serial number has
been defaced, modified or removed.
This board must be interconnected with radio equipment or accessories using connectors. Any sign
of direct soldering to the board will void the Warranty.
Hamtronix liability is limited to repair or replacement of any defective product, Hamtronix shall not be
liable for any damages, whether incidental, consequential or otherwise, because of any defective
Hamtronix product.
If it is necessary to ship the product to us for warranty service, you are responsible for the shipping
charges.
Firmware Updates
Firmware updates, when available, will be published at our web site. Update requests, if compatible with
your hardware, can be requested and will be free of charge during the Warranty period. The controller
must be shipped to Hamtronix for firmware updates. All shipment charges will be paid by customer.

ELEKTRA 2000 Hamtronix
3
CONNECTORS
CN1 –Repeater (RPT)
Pin
Signal
Description
1
RX
RX audio (from repeater receiver)
2
GND
Ground
3
MIC
TX audio (to repeater transmitter)
4
PTT1
PTT signal output (to repeater transmitter)
5
COR
COR/COS signal input (from repeater receiver)
6
TONE
CTCSS logic input (from repeater receiver or optional CTCSS decoder)
7
5V
Regulated 5V/100mA (power source for CTCSS decoder)
8
FAN2
Fan control output
9
VCC
DC Power source (11V ~ 15V/20mA standby)
Note 1:Open Collector - max.100 mA (Active in low)
Note 2:Open Collector - max.100 mA (Active in low)
CN2 –LINK
Pin
Signal
Description
1
RX
RX audio (from link transceiver)
2
GND
Ground
3
MIC
TX audio (to link transceiver)
4
PTT
PTT signal output (to link transceiver)
5
COR
COR/COS signal input (from link transceiver)
6
TONE
CTCSS logic input (from link transceiver or optional CTCSS decoder)
7
ALM
Alarm input (active high)
8
MON
Monitor input
9
-
No connected
CN3 –Remote
Pin
Signal
Description
1
Output 1
Remote Logic Output 1 (OV=OFF/5V=ON)
2
Output 2
Remote Logic Output 2 (OV=OFF/5V=ON)
3
Output 3
Remote Logic Output 3 (OV=OFF/5V=ON)
4
Output 4
Remote Logic Output 4 (OV=OFF/5V=ON)
5
Output 5
Remote Logic Output 5 (OV=OFF/5V=ON)
6
Output 6
Remote Logic Output 6 (OV=OFF/5V=ON)
7
GND
Ground
Note: Max.10mA per port.
PIN OUT
CN1 and CN2
CN3

ELEKTRA 2000 Hamtronix
4
INSTALATION
It’s recommended to enclose the controller board into a shielded box to avoid undesirable radio
interference that may cause unstable operation 1.
Pin on CN1
Legend
Connect to
1
RX
Audio output from repeater receiver2 (discriminator or speaker)
2
GND
Ground (common for power source/receiver/transmitter)
3
MIC
Audio input on repeater transmitter2(microphone or modulator)
4
PTT
PTT input on repeater transmitter
5
COR
COR/COS output from repeater receiver
6
TONE
CTCSS logic output from repeater receiver or optional decoder
9
VCC
13.8V power supply
Note 1: If exposed to high levels of RF without a proper shield, it may present unstable operation.
Note 2: Use shielded cables for audio signals to avoid undesirable noises on repeater audio.
DETERMINING COR LOGIC
Locate your repeater receiver’s COR output. This line has a DC voltage that changes state when a signal
is being received. If the COR line is 0 volts and goes to a positive voltage when a signal is received it is
said to be (positive logic) or active HIGH. If the COR line is a positive voltage, and goes to 0 volts when a
signal is received it is said to be (negative logic) or active LOW. Note: 0 volts is any voltage less than
0.8VDC. A positive voltage is any voltage greater than 2.0VDC.
POSITIVE COR (+)
If you receiver has positive COR, jumper J2 should be at 1-2 position.
NEGATIVE COR (-)
If you receiver has negative COR, jumper J2 should be at 2-3 position.
Note: COR for link port works the same way using at jumper J3.
AUDIO QUALITY
The fidelity of retransmitted audio won’t depend just of the controller’s audio circuit, but from where you get the
audio from the receiver and where you inject on the transmitter
De-emphasis and Pre-emphasis
Before an FM transmitter transmits the audio on the air, the audio coming from the microphone has to pass through a
pre-emphasis circuit. This circuit boosts the audio at 6dB per octave. Pre-emphasis is needed in FM to maintain a
good signal to noise ratio. At the receiver side, a de-emphasis circuit takes the unnatural sounding pre emphasized
audio and turns it back into its original response. Pre emphasized (discriminator) audio is available directly from the
audio demodulation (discriminator) circuitry.
Plain Audio
The main idea is your repeater gets the discriminator audio from the receiver (pre emphasized at origin) and
retransmits without any modification injecting this audio at modulator’s transmitter (after pre-emphasis circuitry).
That way your repeater audio response will be more natural.
The configuration “receiver speaker output”/”transmitter microphone input” can be used, but will required some
equalization to allow a natural sound. You can modify the controller’s flat audio response using capacitors in your
audio circuits. See more details on this on page 5.

ELEKTRA 2000 Hamtronix
5
TURNING YOUR CONTROLLER ON FOR THE FIRST TIME
Place jumper J1 (ON). A melody should be heard if all transmitter connections were made correctly. Key
up on repeater input frequency to check if the received signal is being retransmitted. If the receiver
connections were made correctly, you should be able to hear the courtesy tone after transmitter drops. If
you hear no melody at power up or you can’t access the repeater receiver, remove J1 and check all
connections on the CN1.
AUDIO ADJUSTS
Trimpot
Adjust
Description
Where Act
VR1
RX-1
RPT RX input level
Repeater audio coming from repeater receiver
VR2
TX-1
RPT TX output level
Repeater audio going to repeater transmitter
VR3
RX-2
LINK RX input level
Link audio coming from link transceiver
VR4
TX-2
LINK TX output level
Link audio going to link transceiver
VR5
BEEP
Courtesy tone/CW audio level
All tones generated by microcontroller chip
VR6
PLAY
Voice ID playback level
Voice recorded message
Note: Ideally the level of a coming signal should be retransmitted with the same level. Ask for someone to transmit a
tone or a DTMF tone (turn off mute function for this approach) at repeater input frequency. Using a radio with
REV/MON/Reverse switch, check the AC voltage at radio speaker or discriminator output. Adjust RX-1 and TX-1 to
obtain the same level.
LEDS
Legend
Color
What means
PWR
Red
The controller is powered
RX
Green
A signal is present at repeater or link receiver
TX
Red
The repeater or link is transmitting
DTMF
Yellow
DTMF tones presence
FAN CONTROL OUTPUT
When the repeater transmits, this output will be on (active low) and will remain on for 2 additional
minutes after the TX drops. Use this output to control a fan relay to cool the repeater’s transmitter. This
is an open collector output and can drive 500mA max. ID messages are not considered for fan control.
AUDIO EQUALIZATION
If you need some audio equalization, experiment with capacitors at C11 for repeater audio and
C12 for link audio. A start point could be 1nF until 10uF.
When getting audio from discriminator’s receiver and sending that audio directly to the
transmitter, equalization maybe unnecessary.

ELEKTRA 2000 Hamtronix
6
QUICK GUIDE
Function
Description
Option
Page
01
Repeater Transmitter Enable
[0] OFF, [1] ON
8
02
Hang Time
[0]~[9] X 300ms, 500ms, 1s, 2s, 3s, 5s, 7.5s e 10s
8
03
Time to Courtesy Tone
[0]~[9] X 50ms
8
04
Duration of Courtesy Tone
[0]~[9] X 50ms
8
05
Tone Frequency
[0]~[D] X 100Hz starting at 300Hz
8
06
Tipo do Beep
[0]=Single Tone, [1]~[D] Multi Tone
8
07
Roller Beep
[0]=OFF, [1]=1, [2]=10, [3]=20, [4]=40, [5]=60...
9
08
Courtesy Tone Type
[0]=No confirmation, [1]=2 Beeps and [2] melody
9
09
Time-out Action
[0]=No Action and [1]=transmitter drop
9
10
ID Test
[1]=Msg 1,[2]=Msg 2,[3]=CW and [4]=Hw.Version
9
11
Repeater CTCSS Enable
[0]=OFF and [1]=ON
9
12
Link CTCSS Enable
[0]=OFF and [1]=ON
9
13
Future Use
9
14
ID Timer
[0]~[7] X 5min and [8] for 3s Beacon/Fox Hunting
9
15
ID Selection
[0]=CW, [1]=Msg1 e [2]=Smart
10
16
CW ID Frequency
[0]~[9] X 100Hz starting at 300Hz
10
17
CW ID Speed
[1]~[5] (1 slower/5 faster)
10
18
CW ID Setup
See details on page 10
10
19
Voice ID Setup
[1]=Message 1 and [2]= message 2
11
20
Alarm
[0]=OFF and [1]=ON
11
21
Monitor
[0]=OFF and [1]=ON
11
22
Repeater Port
[0]=OFF and [1]=ON
11
23
Link Port
[0]=OFF, [1]=Aux,[2]=Ctrl, [3]=Link and [4] Cross
11
24
Transmission Test
[0]=OFF, [1]=Carrier and [2]= Carried with Tone
11
25
Simplex Repeater
[0]=OFF,[1]=ON, [2]=ON+beep
12
26
Repeater Time-out
[0]~[9] X 30s
12
27
Output 1
[0]=OFF, [1]=ON, [2]=Pulse
12
28
Output 2
[0]=OFF, [1]=ON, [2]=Pulse
12
29
Output 3
[0]=OFF, [1]=ON, [2]=Pulse
12
30
Output 4
[0]=OFF, [1]=ON, [2]=Pulse
12
31
Output 5
[0]=OFF, [1]=ON, [2]=Pulse
12
32
Output 6
[0]=OFF, [1]=ON, [2]=Pulse
12
33
Repeater DTMF Control Enable
[0]=OFF and [1]=ON
12
34
DTMF Mute Control Enable
[0]=OFF and [1]=ON
12
35
Password Setup
See details on page 12
12
36
RESET
Restart with user program
13
37
REMOTE FULL RESET
Restart with default program
13
38
Voice Recorder Lock
[0]=OFF and [1]=ON
13
39
Multi-Function button
[0]=PLAY, [1]=COR/REC , [2]=TX OFF
13
40
Voice Message Duration
[1]=One 20s Messages and [2]=Two 10s messages
13
41
Voice ID Priority
[0]= Low Priority and [1] High Priority
13
42
Super User Mode
[0]=Password Required and [1]= No Password Required
13
43
Courtesy Tone Editor
[Freq] [Dur] [Int] [Freq] [Dur] [Int] [Freq] [Dur]
13
CONVENTIONS FOLLOWED IN THIS MANUAL
Instruçtion
What To Do
Press 1.
Press and hold PTT switch, press key 1 momentarily, release
PTT switch.
Press 12.
Press and hold PTT switch, press key 1 momentarily, press
key 2 momentarily and release PTT switch.

ELEKTRA 2000 Hamtronix
7
BASIC OPERATION
CONTROLLING YOU REPEATER REMOTELY
With exception of audio levels, all functions are controlled remotely with your radio DTMF keypad.
COMMAND SINTAXES
Commands are as following:
PPPPFF0#
Where: PPPP 4 digits password
FF 2 digits function
O1 digit option
#Enter
See the command for change the sound of courtesy tone:
1234066#
Your controller will answer valid commands with two high frequency confirmation beeps (function 08
must be enabled). If the entered command is invalid, a long, low frequency tone will be heard. The
command must be entered completely in one transmission. If you release PTT switch before you
complete a command, the entered numbers will be discarded.
You can enter more than one command without having to release PTT between them. # acts like a
command separator. If entering a command and you made a mistake, just press * to clear the entered
string and start over.
Note 1: DTMF commands without a correct password will not generate an error message. They will just
be discarded.
Note 2: Some commands don’t require an option or may require extra procedures. These exceptions will
be explained in details at function description.
Note 3: Default password is 1234. After get acquainted with the controller commands, change this
password.
WARNING
To get a correct decoding of DTMF tones, the signal must be free of noises or jamming. If the
repeater is busy, wait until it becomes free prior to sending commands.

ELEKTRA 2000 Hamtronix
8
FUNCTION DESCRIPTION
01 –REPEATER TRANSMITTER ENABLE (Default = 1)
This is the master repeater switch. This function must be enabled for normal repeater operation. The
Elektra 2000 will continue to respond to DTMF commands even when the repeater's transmitter is
disabled. This function will automatically be enabled after a reset or power up.
0Disable 1Enable
02 –TRANSMITTER HANG TIME (Default = 4)
When not zero, the repeater's transmitter will remain on the air for a selected period of time before the it
drops.
0Drops Immediately
3Hang Time of 1s
6Hang Time of 3s
9Hang Time of 10s
1Hang time of 300ms
4Hang Time of 1.5s
7Hang Time of 5s
2Hang Time of 500ms
5Hang Time of 2s
8Hang Time of 7.5s
Note: This time must be greater than the sum of the time for courtesy tone and it’s duration or the
courtesy tone will be missed.
03 –TIMER TO COURTESY TONE (Default = 2)
This function determines the delay after COR is lost until the courtesy tone occurs.
0Immediately
3After 300ms
6After 600ms
9After 900ms
1After 100ms
4After 400ms
7After 700ms
2After 200ms
5After 500ms
8After 800ms
Note: This time must be less than the sum of hang time and courtesy tone duration or the courtesy tone
will be missed.
04 –DURATION OF COURTESY TONE (Default = 1)
Determine the duration of courtesy tone.
0No Courtesy Tone
3150ms long
6300ms long
9450ms long
150ms long
4200ms long
7 350ms long
2100ms long
5250ms long
8400ms long
Note: This function only affects the simple courtesy tone (see function 06). The duration of multi
courtesy tones are not controlled by user, they are pre-determined by the firmware.
05 –COURTESY TONE FREQUENCY (Default = 2)
Determine the frequency of courtesy tone.
0300 Hz
3600 Hz
6900 Hz
91200 Hz
C1500 Hz
1400 Hz
4700 Hz
71000 Hz
A1300 Hz
D1600 Hz
2500 Hz
5800 Hz
81100 Hz
B1400 Hz
Note: This function only act for simple courtesy tone (see function 06). The frequency of multi courtesy
tones are not controlled by user, they are pre-determined by the firmware.
06 –COURTESY TONE SELECTION (Default = 0)
Determine the type of courtesy tone. Only the simple tone may have it’s frequency and duration modified
(See function 04 and 05 for details).
0Simple Tone
5Two apart
ADouble Sweep Tone
1Courtesy Tone Editor (See Function 43)
6Plim-Plim
BFour Fast Tones
2Three Crescent Tones
7CW K letter
CSweep Tone
3Three Decreasing Tones
8NASA Quantar
DDroplet
4Fast Tones
9Five Crescents Tones

ELEKTRA 2000 Hamtronix
9
07 - ROLLER BEEP (Default = 0)
Determine after how many key ups the type of courtesy tone will automatically change.
0Disable
2every 10
4every 40
6every 80
1Each transmission
3every 20
5every 60
7every 100
Note: Options 0 and 1 should only used for demo purposes, since the constant change of courtesy tones
can cause some users to key up all the time and bother others. If function 06 is used, Roller Beep will be
disabled.
08 –CONFIRMATION TONE (Default = 1)
Determine the type of confirmation sound.
0No confirmation sound
1Two high frequency tones
2Melody
09 –TIME-OUT ACTION (Default=1)
When time-out is exceeded, you can choose between transmitter drop until the signal that caused the
drop disappears or just a melody sound of warning.
0Timer-out warning sound
1Transmitter drop
Note: If the transmitter drops and the signal that caused the drop is still blocking the repeater, if you
have a strong signal you can press * to bring the transmitter back.
10 –ID TEST
This function will allow you to test the IDs and check the controller’s version.
1Voice Message 1 playback
2Voice Message 2 playback
3CW ID
4Software version
11 –REPEATER CTCSS ENABLE (Default = 0)
When enabled, will require a correct CTCSS to operate the repeater port.
0Disable
1Enable
Note: This function should only be activated if a CTCSS decoder (optional) is installed and its logic
output is connected to CN1-6. The logic must be low (0V) when a CTCSS is present otherwise high (5V).
If the Hamtronix TED200 generic decoder is used, you can remotely change CTCSS codes using remote
control outputs. TED200 has 8 extra CTCSS tones not available in all amateur radios for a better security
in private or commercial repeaters use.
12 - LINK CTCSS ENABLE (Default = 0)
When enabled, will require a correct CTCSS to activate the repeater link port.
0Disable
1Enable
Note: This function should only be activated if a CTCSS decoder (optional) is installed and its logic
output is connected to CN2-6. The logic must be low (0V) when a CTCSS is present otherwise high (5V).
If the Hamtronix TED200 generic decoder is used, you can remotely change CTCSS codes using remote
control outputs. TED200 has 8 extra CTCSS tones not available in all amateur radios for a better security
in private or commercial repeaters use.
14 –ID TIMER (Default = 1)
Determine how often the ID (voice or CW) will be transmitted.
0No ID
2Every 10 min
4Every 20 min
6Every 30 min
8every 3s
1Every 5 min
3Every 15 min
5Every 25 min
7Every 35 min
Note: Option 8 is available for beacon and fox hunting applications. Prefer to use the 3s intervals for
sending command to controller.