FunkTronic FT 634a User manual

Line Interface
FT 634a, FT 634aC, FT 634aCL

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Content
Technical Data 2
General Features 3
Channel Switching 4
Option Line Monitoring 4
Transmitter Control 4
Functions of the LEDs 4
Examples 5
Jumper 7
Block Diagram FT634a (C, CL) 8
Block Diagram DSP 9
Pinout 10
Connecting Cable RS232 12
Service Program/Adjustment 12
Programming 14
Tone Chart 16
General Safety Instructions 17
Factory Returning of old equipment 17
Terms and Abbreviations 18
These instruction are valid from serial number: 3001/06 PCB Nr.: FT634a2
Seite
Technical Data
Voltage of operation +12V DC -30% +40%
Current demand ca. 200 mA
Fuse 1 A, self-resetting
Weight ca. 525 g
Dimensions W x H x D 104 x 44 x 175 mm
Frequency of pilot tone 3300 Hz
Pilot tone decoder +/- 0,8 % (+/- 26 Hz)
Response time < 20 ms
Release time < 40 ms
min. pilot tone level at measuring (monitor.)point 75 mV
Notchfilter pilot tone suppression > 50 dB
2- resp. 4-wire
Input level 2-wire -1,4 dBm nominally, 658 mV
Adjustment range 2-wire -23 dBm to +3 dBm, 55 mV to 1 V
Input level 4-wire -3,5 dBm nominally, 518 mV
Adjustment range 4-wire -25 dBm to +1 dBm, 44 mV to 869 mV
Input impedance 2-wire Zr or 600 Ohm, 4-wire 600 Ohm
Output level 2/4-wire -4,5 dBm, 461 mV at 600 Ohm (max. without limit)
Output level range 2/4-wire, 600 Ohm -30 dBm to -2 dBm, 25 mV to 615 mV
Output level range 2/4-wire, 200 Ohm -36 dBm to 8,5 dBm, 12 mV to 291 mV
Output impedance 2-wire Zr or 600 Ohm
Output impedance 4-wire 600 Ohm
Interface radio device resp. desk top control
Input level + 3 dBm nominally
Adjustment range - 24 to + 6 dBm
Input impedance 600 Ohm
Output level - 17 dBm ex factory setting
Adjustment range - 30 to + 5 dBm
Output impedance 600 Ohm

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General Features
The new line interface FT634a is completely constructed in SMD-technology. The connections are
pin-compatible with the former version, but instead of male connectors there are female connectors.
The line interface is used to remotely operate a two-way radio by a 2- or 4-wire connection. It is
possible to bridge very long distances depending on the cable attenuation. The FT634a is the simplest
and most reasonable version. There are 6 different versions of the line interface FT634a. All versions
offer the following features:
All versions of the FT634a
- 2- or 4-wire connection (selectable by jumper)
- Impedance 600 Ohm or Zr (selectabel by jumper) (Zr only for 2-wire)
- Connector radio device --> AF-in/output and PTT-out
- Pilot tone decoder 3300 Hz or DC-decoder
- Serial interface RS232 to adjust and program
- All levels adjustable with RS232
- All AF-in/outputs galvanically separated (transformer)
Version FT634aC
The version FT634aC additionally offers the possibility to switch channels remotely. The information
for switching channels remotely are transmitted by 5-tone. A pilot tone encoder for 3300 Hz and a DC-
encoder are also included. These are needed to connect the line interface to an operation terminal
(e.g Major 6). The FT634aC has 8 digital inputs and 8 digital outputs.
Version FT634aCL
The version FT634aCL additionally offers line monitoring. This means that the connection of the 2/4-
wire line is constantly monitored.
The versions FT634a, FT634aC and FT634aCL are available in two different housings.
- black flange aluminum housing
- 19 inch plug-in unit

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Channel switching
Remote switching of channels is achieved by transmitting certain 5-tone sequences. The interface to
the two-way radio device is parallel. The channel switching status output can be "binary", "binary-1",
"decimal" and "2xBCD". The channel output can be inverted if necessary.
Option line monitoring
The operating mode line monitoring can be configured for the FT634aCL. To do this devices with
this option are needed at both ends of the line. Line monitoring is only active during idle times of the
wire.
For this one of the devices has to be configured as master, the other as slave. The master device then
scans the slave device in certain intervals. If there is no reply or the slave-device doesn´t receive a
scan by the master-device within a certain interval, one of the switching outputs can be programmed
as error indicator.
Transmitter control
The transmitter control is activated as soon as the AC-line receives and decodes the pilot tone. Then
the PTT-output is switched by a potential-free relay. The PTT-output can also be controlled by DC- or
AF-decoding (register 053/1).
Functions of the LEDs
The green LED is on when the pilot tone is decoded by the AC-line or a DC potential is applied or
AF is decoded depending on the configuration. The green LED blinks when there is a decoding but
the switching of the transmitter relay is suppressed.
The yellowlbe LED is on when the pilot tone was activated or DC applied to the line or the AF
connected to the line. The yellow LED blinks when the activation of one of the afore-mentioned
functions is suppressed.
LED green transmitter relay on
because
- Pilot tone was decoded or
- DC was decoded or
- AF was decoded
(blinking see description)
LED yellow
- Pilot tone turned on or
- DC applied and
- AF connected to the line
(blinking see description)

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2
LIM AC
LIM AC
2 or 4
FT634aC (with channel switching) or
FT634a (without channel switching)
Example 2: Parallel circuit of several operation terminals --> LIM AC has to be equipped with notch
for pilot tone. On private lines the remote control can be carried out by DC.
Here the two LIM AC and the notch lters for the pilot tone are not
needed.
2
2
FT624
FT634aC (with channel switching) or
FT634a (without channel switching)
Major 4a or 5a
Major 5a
Major 4a
Example 1: 2- or 4-wire remote control via private lines
2 oder 4
FT634aC (with channel switching) or
FT634a (without channel switching)
FT634aCL (with line monitoring)
Major 4a, 5a or 6
Example 3: 2- or 4-wire remote control via leased lines.
AC- or DC- remote control
LIM AC (only 2-wire)
FT634aC
Examples
Depending on the setup of the radio installation different versions of the FT634a can be used. The
following questions should be answered when planning:
- Interface connection of the FT634a to an operation terminal or a two-way radio set
- Remote channel switching necessary
- Line monitoring necessary
- 2- or 4-wire connection, simplex or duplex
- Remote station also FT634a or operation terminal

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Example 4: Operation terminal Major 6 via 2-wire to the multi-channel radio set (with option line
monitoring)
2
Major 6, 4a or 5a
FT634aCL
(with line monitoring)
FT634aCL
(with line monitoring)

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Jumper
Different configurations can be adjusted with the internal jumpers . For example you can choose
between 2- or 4-wire connections. The functions of the different jumpers are printed directly onto the
circuit board.
2D = 2 wire
4D = 4 wire
Zr = complex impedance
600 = real impedance 600 Ohm
AC = remote control by AC voltage
DC = remote control by DC voltage
= jumper
Jumper setting normal, 2D, Zr, AC (ex factory)
Jumper setting 2D, 600 Ohm, DC
Jumper setting 2D, Zr, DC Jumper setting 2D, 600 Ohm, AC
Jumper setting 4D, 600 Ohm, DC Jumper setting 4D, 600 Ohm, AC

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Block diagram FT634a (C, CL)

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Block diagram DSP

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Pinout
The pinout is the same for all types of the FT634a .
8-pole Western jack "RS232"
I/O 12 (in/output) 8
I/O 11 (in/output) 7
I/O 10 (in/output) 6
I/O 09 (in/output) 5
I/O 08 (in/output) 4
GND (in/output) 3
RS232 RxD (input) 2
RS232 TxD (output) 1
LED green, transmitter relay on, because
- pilot tone decoded or
- DC decoded or
- AF decoded
(blinking see description)
LED yellow
- pilot tone on or
- DC on and
- AF connected to line
(blinking see description)
I/O: Line, 2D, 4D out 1
free 2
I/O: GND 3
free 4
I/O: Line, 2D, 4D in 5
6 OUT: Line, 4D out
7 I/O: I/O 13 (Pull-up 5V)
8 I/O: I/O 4 (o.C.)
9 IN: Line, 4D in
9-pole Sub-D jack "LINE"

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15-pole Sub-D jack "RADIO"
IN : + 12 V 1
OUT: PTT-Relay 2
OUT: PTT-Relay 3
OUT: radio, AF out 4
OUT: radio, AF out 5
I/O: I/O 0 (o.C.) 6
I/O: I/O 1 (o.C.) 7
I/O: GND 8
9 IN: + 12 V
10 IN: Squelch
11 IN: radio, AF in
12 IN: radio, AF in
13 I/O: I/O 2 (o.C.)
14 I/O: I/O 3 (o.C.)
15 I/O: GND
64-pole bus connector, 19 inch version
Pin A C
------------------------------------------------------------------------------------------------------------
1 IN : + 12 Volt IN: + 12 Volt
2 IN : Analog 1 (0-7V) IN: Analog 2 (0-7V)
3 I/O: I/O 08 (Pull-up 5V)
4 I/O: I/O 09 (Pull-up 5V) IN : Line, 4D in
5 I/O: I/O 10 (Pull-up 5V) OUT: Line, 4D out
6 I/O: I/O 11 (Pull-up 5V) I/O: Line, 2D, 4D out
7 I/O: I/O 12 (Pull-up 5V) I/O: Line, 2D, 4D in
8 I/O: I/O 13 (Pull-up 5V) OUT: bus, AF RADIO>BUS
9 I/O: I/O 14 (Pull-up 5V) IN : bus, AF BUS>LINE
10 I/O: I/O 15 (Pull-up 5V) IN : radio, AF in
11 I/O: I/O 0 (o.C.) IN : radio, AF in
12 I/O: I/O 1 (o.C.)
13 I/O: I/O 2 (o.C.)
14 I/O: I/O 3 (o.C.)
15 I/O: I/O 4 (o.C.) OUT: radio, AF out
16 I/O: I/O 5 (o.C.) OUT: radio, AF out
17 I/O: I/O 6 (o.C.) I/O: I/O 7 (o.C.)
18 IN : plug-in position config. 1
19 IN : plug-in position config. 2
20 IN : plug-in position config. 3 IN : bus, AF BUS>RADIO
21 IN : plug-in position config. 4 I/O: DATA (RS232_UGA)
22 IN : RXD (RS232_ext) OUT: TXD (RS232_ext)
23 I/O: SDA (I2C) I/O: SCL (I2C)
24 OUT: PTT-Relay OUT: PTT-Relay
25
26 IN : Squelch
27
28
29
30
31 OUT: +3,3V OUT: +5V
32 I/O: GND I/O: GND

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Service program/Adjustment
The FT 634aC has a RS-232 interface with the following specifications
9600 Baud, 1 Startbit, 8 Data bits, No Parity, 1 Stop bit,
no protocol or Xon/Xoff
For communication with Windows e.g. the terminal program "HyperTerminal" can be used. For Linux
we recommend the program minicom.
After hitting the key ENTER the terminal program prompts you for input. You have the following
choices:
Online - Monitor FT634a
-----------------------
Software: FT634aC
Version : V1.00
SW-date: 17.10.06
Rxxx................read register xxx
Pxxx yyyyyyyy.......program register xxx with yyyyyyyy
A...................adjust potentiometer
Tx..................TX-relay on/off (1/0)
Kxx.................switch channel xx (00-99,?)
Ixxxx...............tone generator on with xxxxHz
$xxxxx .............transmit tone sequence xxxxx
Q...................reset software
X...................end monitor
After hitting the key A the monitor prompts you for adjustment with the following screen :
Which potentiometer is to be adjusted?
1: input of line - amplification
2: input of line - equalization
3: output to two-way radio
4: input of two-way radio
x: end
5 GND
3 TxD RS232
2 RxD RS232
Computer equipped with RS232 9-pole jack
RS232 jack on FT634
RS232-connecting cable
GND 3
RxD 2
TxD 1

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The screen for potentiometer 1:
(The actual reading of the internal reference value iis shown after changing or blank key.)
Adjustment potentiometer 1:
Feed with required level into line-input at 1000Hz.
Adjust ‚Line‘ to 300mV at internal reference value.
Initial value: adjustment potentiometer 1:
Feed with required level into line-input at 1000Hz.
Adjust ‚Line‘ to 300mV at internal reference value.
Initial value: 014 (min:000 max:255) level: 000 mV reference value:
300 mV
Keys: <+> : +1
<*> : +10
<-> : -1
<_> : -10
< > : measuring only
<a> : self-adjustment
<p> : programming
<x> : cancel
The screen for potentiometer 2:
Adjustment potentiometer 2:
Feed with required level at line-input at 3400Hz.
Adjust ‚Line‘ to 300mV at internal reference value.
Initial value: 057 (min:000 max:255) level: 000 mV required value:
300 mV
Keys: <+> : +1
<*> : +10
<-> : -1
<_> : -10
< > : measuring only
<a> : self-adjustment
<p> : programming
<x> : cancel
The screen for potentiometer 3:
Adjustment potentiometer 3:
Feed with required level at line-input at 1000Hz.
Adjustment pot 1 and 2 (reference value ‚Line‘ = 300mV).
Adjustment radio-output at required value (required modulation
depth).
Initial value: 015 (min:000 max:255)
Keys: <+> : +1
<*> : +10
<-> : -1
<_> : -10
<t> : transmitter on/off
<p> : programming
<x> : cancel
The screen for potentiometer 4:
Adjustment potentiometer 4:
Feed at radio input with required level at 1000Hz.
Adjust at internal reference value ‚Radio‘ to 300mV.
Initial value: 160 (min:000 max:255) level: 000 mV required value:
300 mV
Keys: <+> : +1
<*> : +10
<-> : -1
<_> : -10
< > : measuring only
<a> : self-adjustment
<p> : programming
<x> : cancel

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Programming
Reg. Default Description
050 03100320 AF-mute level
1.+2. digit: ca. nn*0,9mV threshold AF-mute line>radio activation
3.+4. digit: ca. nn*0,9mV threshold AF-mute line>radio deactivation
5.+6. digit: ca. nn*0,9mV threshold AF-mute line>line activation
7.+8. digit: ca. nn*0,9mV threshold AF-mute radio>line deactivation
052 12500128 Pilot tone
1. digit: pilot tone filter frequency, 0=no filter, 1=3300Hz
2. digit: pilot tone detection, n*5ms decoding until on
3. digit: pilot tone detection, n*5ms no decoding until off
4.-8. digit: pilot tone detection, min.level (0-32767) 00128=75mV,
*2=-3dB;/2=+3dB sensitivity
053 12211220 TX-configuration
1. digit: TX-decoder 0=off, 1=PIL, 2=DC, 3=PIL+DC, 4=AF-squelch
2. digit: operating mode:
0: 4-wire, low amplification of line (-25...0dBm)
1: 4-wire, high amplification of line (-40...-15dBm)
2: 2-wire, low amplification of line (-25...0dBm)
3: 2-wire, high amplification of line (-40...-15dBm)
3. digit: priority
0: none
1: RX before TX
2: TX before RX
3: first come, first served...
4. digit: AF-directions without RX, without TX
5. digit: AF-directions with RX, without TX
6. digit: AF-directions without RX, with TX
7. digit: AF-directions with RX, with TX
0: RADIO>LINE off, LINE>RADIO off
1: RADIO>LINE on , LINE>RADIO off
2: RADIO>LINE off, LINE>RADIO on
3: RADIO>LINE on , LINE>RADIO on
054 02604010 AF-squelch configuration
1.-2. digit: n*5ms above threshold, until SQL on
3.-4. digit: ca. nn*1,8mV threshold AF on
5.-6. digit: n*5ms below threshold, until SQL off
7.-8. digit: ca. nn*1,8mV threshold AF off
055 10100000 Advance time register
1.+2. digit: nn*10ms advance time
3.+4. digit: nn*10ms delay time
056 00051205 Squelch configuration
1. digit: squelch input
0: active low, pullup on
1: active high, pullup off
2: free (audio squelch)
3: free (phantom)
4: active low, pullup off
5: active high, pullup on
3.+4. digit: nn*10ms TX-off-period after own AF on line
5.+6. digit: nn*10ms TX-off-period after own DC on line
7.+8. digit: nn*10ms TX-off-period after own pilot tone on line
EEPROM-Register FT634a

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063 BCD00000 channel switching register
1.-3. digit: digits 1-3 of the remote channel switching sequence
064 00100000 channel register
2.+3. digit: channel 00-99
066 01080000 channel configuration
2. digit: channel output
0: none
1: decimal
2: binary-1
3: binary
4: 2xBCD
3. digit: 0: channel output normal
1: channel output inverted
4. digit: number of channel bits (0-8)
5. digit: 0: channel acknowledgement normal (BCDxy)
1: channel acknowledgement Major6 (CBDxy)
2: channel acknowledgement normal with line activation
(pilot or DC like 069/1)
3: channel acknowledgement Major6 with line activation
(pilot or DC like 069/1)
069 00000100 RX-configuration
1. digit: RX-signaling to line
0: programmed pilot tone
2: DC
2.-5. digit: pilot tone
frequency 1000s,100s,10s,1s Hz
6. digit: pilot tone filter frequency, 0=no filter, 1=3300Hz
7. digit: line filter, 0=off, 1=on (bandpass 300-3400Hz)
080 01810000 decoder reference 1
1.-3. digit: nnn*5ms max. tone duration 1st tone
4.+5. digit: nn*5ms min. tone duration all tones
081 01800000 decoder reference 2
1.-3. digit: nnn*5ms max. tone duration from 2nd tone on
5. digit: tone calling system 0:ZVEI, 1:CCIR, 2:ZVEI2, 3:EEA
082 07707000 encoder reference
1.+2. digit: nn * 10ms tone duration 1st tone
3. digit: n * 10ms tone duration all other tones
103 DCBCDCBC configuration switching inputs FT634C
1.-4. digit: tone sequence digits 1-4
5.-8. digit: expected acknowledgement
230 00025560 4.-8. digit: multiplicator for output level line>radio (0-32768)
234 00008300 4.-8. digit: multiplicator for output level tone>radio (0-32768)
236 00000000 4.-8. digit: multiplicator for output level pilot>radio (0-32768)
242 00025560 4.-8. digit: multiplicator for output level radio>line (0-32768)
244 00008300 4.-8. digit: multiplicator for output level tone>line (0-32768)

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246 00006400 4.-8. digit: multiplicator for output level pilot>line (0-32768)
250 00000128 4.-8. digit: min. level for tone decoding of radio (0-32768)
251 00000128 4.-8. digit: min. level for tone decoding of line (0-32768)
Tontabelle
Tone chart
Tone ZVEI 1 CCIR ZVEI 2 EEA
0 2400 Hz 1981 Hz 2400 Hz 1981 Hz
1 1060 Hz 1124 Hz 1060 Hz 1124 Hz
2 1160 Hz 1197 Hz 1160 Hz 1197 Hz
3 1270 Hz 1275 Hz 1270 Hz 1275 Hz
4 1400 Hz 1358 Hz 1400 Hz 1358 Hz
5 1530 Hz 1446 Hz 1530 Hz 1446 Hz
6 1670 Hz 1540 Hz 1670 Hz 1540 Hz
7 1830 Hz 1640 Hz 1830 Hz 1640 Hz
8 2000 Hz 1747 Hz 2000 Hz 1747 Hz
9 2200 Hz 1860 Hz 2200 Hz 1860 Hz
A 2800 Hz 2400 Hz 886 Hz 1055 Hz
B 810 Hz 930 Hz 810 Hz 930 Hz
C 970 Hz 2247 Hz 740 Hz 2247 Hz
D 886 Hz 991 Hz 680 Hz 991 Hz
E 2600 Hz 2110 Hz 970 Hz 2110 Hz
Duration ZVEI 1 CCIR ZVEI 2 EEA
min. 52.5 ms 75 ms 52.5 ms 30 ms
typ. 70 ms 100 ms 70 ms 40 ms
max. 87.5 ms 125 ms 87.5 ms 50 ms

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Please read the operating instructions carefully before installation and setup.
The relevant regulations must be complied to when working with 230V line voltage, two-wire-
lines, four-wire-lines and ISDN-lines. It is also very important to comply to the regulations
and safety instructions of working with radio installations.
Please comply to the following safety rules:
- All components may only be mounted and maintained when power is off.
- The modules may only be activated if they are built in a housing and are
scoop-proof.
- Devices which are operated with external voltage - especially mains voltage -
may only be opened when they have been disconnected from the voltage source
or mains.
- All connecting cables of the electronic devices must be checked for damage
regularly and must be exchanged if damaged.
- Absolutely comply to the regular inspections required by law
according to VDE 0701 and 0702 for line-operated devices.
- Tools must not be used near or directly at concealed or visible power lines
and conductor paths and also not at and in devices using external voltage –
especially mains voltage - as long as the power supply voltage has not been
turned off and all capacitors have been discharged. Electrolytic capacitors
can be still charged for a long time after turning off.
- When using components, modules, devices or circuits and equipment the
threshold values of voltage, current and power consumption specified in the
technical data must absolutely be complied to. Exceeding these threshold
values (even if only briefly) can lead to significant damage.
- The devices, components or circuits described in this manual are only
adapted for the specified usage. If you are not sure about the purpose of the
product, please ask your specialized dealer.
- The installation and setup have to be carried out by professional personnel.
Factory returning of old equipment
According to German law concerning electronic devices old devices cannot be disposed off
as regular waste. Our devices are classified for commercial use only. According to § 11 of
our general terms of payment and delivery, as of November 2005, the purchasers or users
are obliged to return old equipment produced by us free of cost. FunkTronic GmbH will
dispose of this old equipment at its own expense according to regulations.
Please send old equipment for disposal to: FunkTronic GmbH
Breitwiesenstraße 4
36381 Schlüchtern
>>> Important hint: freight forward deliveries cannot be accepted by us.
February 2nd , 2006
Subject to change, Errors excepted
General Safety Instructions

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Terms and abbreviations
lLine 2-wire cable
Radio 2-way-radio
ZR Reference impedance,
this is the same as a real 2-wire-cable according to German TBR 15
2D 2 wire
4D 4 wire
Zr Complex impedance according to German TBR
600 Real impedance 600 Ohm according to German TBR
AC Remote control via AC voltage
DC Remote control via DC voltage
IN Input
OUT Output
I/O In- and output
SDA I2C-Bus Data
SCL I2C-Bus Clock
TXD RS232 Transmitter
RXD RS232 Receiver
PTT Push To Talk
DSP Digital Signal Processor
FT FunkTronic

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Revision remarks
Modifications made are only mentioned in note form in this section. For detailed information please
read the corresponding chapters.
23.06.09 - Revision remark added