FunkTronic Major BOS 8a User manual

Major BOS 8a

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Page
Inhalt
Major BOS 8a 3
Connectivity 3
Control and Display Elements Major BOS 8a 4
Calling a Single Radio Subscriber 6
RX-AF Outputs 10
Encoder 10
External Signalling Device 11
Transmitter Control 11
Connection to Telephone AF 11
Microphone Selection 11
Channel Selection (additionally) 11
Opto-Coupler Input 12
Connecting several Major in Parallel Circuit 13
Activating the Busy Lines 13
Actions on Detection of Busy Lines 14
Monitoring-Interface TBBox4 (Accessories) 15
Tape Control (continued) 17
Functions for TETRA Digital Radios (Software V5.2 and newer) 17
Switching Matrix for Circuit Forwarding (optional) 18
New Registers in MBOS 8a: 19
Service Program 20
EEPROM Adresses 22
EEPROM Adresses (continued) 23
Jumpers und Potentiometers 28
Board Layout 29
Adjustment Instructions 30
Sockets Pinout 31
Technical Data 33
General Safety Remarks 34
Returning of Old Equipment 34
Release Notes 35
Appendix 36
Conversion chart: hexadecimal (HEX) <--> decimal (DEC) 36
Order Information
Order No. Description
631110 Major BOS 8a
635090 RS232 programming cable
900011 Power supply unit, suitable for Major BOS 1a, 2b, 4a, 8a

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Major BOS 8a
Major BOS 8a is a µC-controlled desktop controller unit for 2-way radio systems controlling
up to eight radios. Different operating parameters can either be factory preset or programmed
during installation.
Connectivity
For operation 12 V DC power supply is necessary. Up to eight channels (radio sets, PA
systems -/intercom etc.) can be connected, also an external handset/headset, up to two
external monitoring-interfaces (TBBox4), an external signalling device, a tape recorder
and a AF-RX-amplifier for each channel.
Furthermore there is a RS232-connection, to which a terminal can be connected, or a PC
for external control.
There is a squelch input for each radio and also a PTT output, a busy-line,an AF-input and
AF-output. As the TX-AF-outputs are only active while transmitting, several Major BOS
4a´s can be connected in parallel without any problems.
12VDC -> power supply connector (12V DC, external, max. 1.5A)
I2C -> I2C bus
TB -> Tonbandgerät
RS232 -> RS 232 connection
PTT -> PTT (e.g. foot switch)
HS -> headset
1 - 8 -> transmit/receive (circuit 1 - 8: radio, PA system-/
intercom, etc.)
see also section Sockets Pinout

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1 - PTT , carrier , loudspeaker and selection displays
2 - selection buttons
3 - volume buttons (increase)
4 - volume displays (LED line)
5 - volume buttons (decrease)
6 - loudspeaker buttons (mute)
7 - call 1 buttons
8 - call 2 buttons
9 - PTT buttons (for gooseneck microphone)
10 - loudspeaker
11 - handset with PTT button
12 - gooseneck microphone
Control and Display Elements Major BOS 8a
4
5
6
87
9
2
3
10
11
1
12

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Control and Display Elements (continued)
Keyboard
The keyboard holds the following functions for each of the eight channels:
Kreis selection button
increase volume
decrease volume
mute loudspeaker
Ruf 1 button for tone call 1
Ruf 2 button for tone call 2
Senden PTT button
Carrier Display (Squelch)
For each of the eight circuits there is a separate carrier display (squelch) LED . To
control the carrier display the squelch input can either be switched for ground (GND) or
to +12V. The logic of the squelch input can be configured separately for each radio with
the jumpers J18 to J25.
PTT Display
For each of the eight circuits there is also a separate PTT display LED , that lights if
the transmitter for the respective circuit is keyed by pressing PTT, call 1 or call 2. If a PTT
display flashes, another control set is transmitting on this radio circuit.
Loudspeaker Display
The loudspeaker display LED lights either if loudspeaker AF is active or if the loudspeaker
is muted for that circuit.
The logic of the loudspeaker display can be programmed in register 030 / bit 0 of the
EEPROM:
register 030 loudspeaker display lights when
bit 0: 0 = loudspeaker AF is active
1 = loudspeaker AF is muted
Selection Display
The selection display LED lights, if the respective circuit was selected and is active. If
programmed in that way, the LED flashes if the circuit is selected by a different Major.

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Calling a Single Radio Subscriber
To activate one of the eight channels push the corresponding selection button. To
deactivate a channel again push the corresponding selection button once more.
Depending on the configuration of the EEPROM-Register 030 in bit 1 you can either
select several channels simultaneously or only one channel at a time.
register 030 number of circuits that can be selected
bit 1: 0 = several channels simultaneously (cumulative)
1 = only one channel at a time selected
When channels are activated the channel selection LED lights up. If the channel has
already been selected by a different Major BOS 8a the device can be programmed so that
the corresponding channel selection LED flashes.
In EEPROM register 024 you can preselect which of the channels 1..8 (bit 0..7) is
automatically selected after turning on the control set.
register 024 selected channels after turning on
bit 0: channel 1 no / yes (0/1)
bit 1: channel 2 no / yes (0/1)
bit 2: channel 3 no / yes (0/1)
bit 3: channel 4 no / yes (0/1)
bit 4: channel 5 no / yes (0/1)
bit 5: channel 6 no / yes (0/1)
bit 6: channel 7 no / yes (0/1)
bit 7: channel 8 no / yes (0/1)
It is possible to configure the EEPROM-Register 027 so that the selected channels are
automatically saved in the EEPROM-Register 024 when the radio installation is turned
off.
Register 027 angewählte Kreise speichern Nein/Ja (00/01)
Communicating with the Radio Subscriber
There are three different ways of communication with a calling radio subscriber:
a) By pushing one of the red PTT buttons the transmitter of the corresponding channel
is activated and you can talk to the caller through the gooseneck microphone. (It is also
possible to connect an external switch contact instead of a PTT button. See section Opto-
Coupler input.) After pressing the PTT button the caller can be heard on the loudspeaker.
The receiver volume of the corresponding channel is adjustable.
b) By picking up the handset and pushing the PTT button on the inside of the handset.
By doing so the transmitter of the selected channel is activated (PTT LED lights up) and
you can talk with the caller through the microphone of the handset. Depending on the
configuration you can hear the caller constantly on the handset or only after deactivating
the PTT button. The call is ended by replacing the handset. The volume of the earpiece
and the microphone are each adjustable by a potentiometer. The potentionmeter is situ-
ated near the earpiece of the handset and is easily accessible from the outside, using a
screw-driver through a small opening on the inside of the handset.

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c) By connecting a compatible handset/headset and pressing the corresponding PTT button
PTT2 (e.g. a foot switch). By doing this the transmitter of the selected radio channel is also
turned on (PTT LED lights up) and you can talk with the caller through the microphone of
the handset/headset. Depending on the configuration you can hear the caller constantly
on the handset or only after releasing the PTT button. The volume of the corresponding
channel is adjustable.
If another controlling device is already transmitting on a radio channel the Major BOS
4a can be programmed so that the corresponding TX LED blinks and optionally the PTT
button is blocked. After ending the call the activated radio channel can be deactivated by
pressing the corresponding selection button again.
The microphone level of the handset/headset can be adjusted with the potentiometer P10
and the level of its loudspeaker with the potentiometer P12.
Loudspeaker
The built-in loudspeaker is automatically turned off during transmission.
It is also possible to configurate the EEPROM-Register 02A in bit 1 so that the
loudspeaker is also turned off automatically when the handset is lifted.
register 02A Loudspeaker switching status when handset is lifted
bit 1: 0 = Loudspeaker ON
1 = Loudspeaker OFF
The receiver AF (on the loudspeaker) of individual radio channels can either be muted
manually by pressing the loudspeaker buttons or automatically when the correspending
busy line is activated (see section Parallel circuit of several Major BOS 8a).
In EEPROM register 025 the loudspeaker switching statuses of the radio channels 1..8
(bit 0..7) can be preselected after turning on the radio installation.
register 025 Loudspeaker switching status after turning on
bit 0: Channel 1 OFF/ON (0/1)
bit 1: Channel 2 OFF/ON (0/1)
bit 2: Channel 3 OFF/ON (0/1)
bit 3: Channel 4 OFF/ON (0/1)
bit 4: Channel 5 OFF/ON (0/1)
bit 5: Channel 6 OFF/ON (0/1)
bit 6: Channel 7 OFF/ON (0/1)
bit 7: Channel 8 OFF/ON (0/1)
In addition it is possible to make a configuration in the EEPROM register 028 so that the
loudspeaker switching statuses are automatically saved in EEPROM register 025 when
the Major is turned off.
register 028 Saving the loudspeaker switching statuses
No/Yes (00/01)

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Loudspeaker (continued)
The EEPROM-Register 02A in bit 0 can be configurated so that the receiver AF of all
radio channels (without muting) is switched to the loudspeaker or that the corresponding
radio channels also have to be activated additionally.
register 02A receiver AF on loudspeaker
bit 0: 0 = all radio channels without muting
1 = only activated radio channels without muting
Volume Control
The volume of the loudspeaker which is turned on can be set separately with the volume
buttons ( = higher, = lower) for each radio channel. The volume level is displayed
on the LED line.
In EEPROM registers 018...01F the volume settings (´01..´08) for each radio channel
can be preselected separately after turning on the radio installation.
volume after switching on for
register 018 Channel 1
register 019 Channel 2
register 01A Channel 3
register 01B Channel 4
register 01C Channel 5
register 01D Channel 6
register 01E Channel 7
register 01F Channel 8
In EEPROM register 029 you can also make a configuration so that the selected volume
settings are automatically saved in the EEPROM registers 018...01F when the radio
installation is turned off.
register 029 save volume setting No / Yes (00/01)

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Earphones
The receiver AF of the selected radio channel can always be heard on the earphones of
the handset and the headset.
The earphone AF of individual radio channels can be muted either manually by pressing
the selection buttons or automatically by transmitting on the active or on one of the other
radio channels (earphone muting).
a) In EEPROM register 022 a configuration for the radio channels 1..8 (bit 0..7) can be
made so that the earphone AF for the active radio channel is muted while transmitting.
register 022 earphone AF (while transmitting on the active channel) for
bit 0: Channel 1 OFF / ON (0/1)
bit 1: Channel 2 OFF / ON (0/1)
bit 2: Channel 3 OFF / ON (0/1)
bit 3: Channel 4 OFF / ON (0/1)
bit 4: Channel 5 OFF / ON (0/1)
bit 5: Channel 6 OFF / ON (0/1)
bit 6: Channel 7 OFF / ON (0/1)
bit 7: Channel 8 OFF / ON (0/1)
b) In EEPROM register 023 a configuration for the radio channels 1..8 (bit 0..7) can be
made so that the earphone AF is muted while transmitting on a different radio channel.
register 023 earphone AF (while transmitting on a different radio channel) for
bit 0: Channel 1 OFF / ON (0/1)
bit 1: Channel 2 OFF / ON (0/1)
bit 3: Channel 3 OFF / ON (0/1)
bit 4: Channel 4 OFF / ON (0/1)
bit 5: Channel 5 OFF / ON (0/1)
bit 6: Channel 6 OFF / ON (0/1)
bit 7: Channel 7 OFF / ON (0/1)
bit 8: Channel 8 OFF / ON (0/1)

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RX-AF Outputs
The volume-controlled receiver AF can be tapped individually for each radio channel on
the Major BOS 8a. The outputs can be used e.g. for connecting external AF-amplifier.
The receiver AF (RX-AF outputs) of individual radio channels can be muted either
- manually by pressing the loudspeaker buttons or
- automatically by activating the corresponding busy lines or
- automatically by transmitting on the active or a different radio channel
There is one muting output per radio channel with which the connected AF-RX amplifier
can be muted when there is no receiver signal (squelch) (output switches to GND). See
also section Sockets Pinout.
a) In EEPROM register 020 a configuration for the radio channels 1..8 (bit 0..7) can be
made so that the RX-AF output is muted while transmitting on the own radio channel.
register 020 RX-AF output (while transmitting on the active radio
channel) for
bit 0: Channel 1 OFF / ON (0/1)
bit 1: Channel 2 OFF / ON (0/1)
bit 2: Channel 3 OFF / ON (0/1)
bit 3: Channel 4 OFF / ON (0/1)
bit 4: Channel 5 OFF / ON (0/1)
bit 5: Channel 6 OFF / ON (0/1)
bit 6: Channel 7 OFF / ON (0/1)
bit 7: Channel 8 OFF / ON (0/1)
b) In EEPROM register 021 the radio channels 1..8 (bit 0..7) can be configured so that
the RX-AF output is muted while transmitting on a different radio channel.
register 021 RX-AF output (while transmitting on a different
radio channel) for
bit 0: Channel 1 OFF / ON (0/1)
bit 1: Channel 2 OFF / ON (0/1)
bit 2: Channel 3 OFF / ON (0/1)
bit 3: Channel 4 OFF / ON (0/1)
bit 4: Channel 5 OFF / ON (0/1)
bit 5: Channel 6 OFF / ON (0/1)
bit 6: Channel 7 OFF / ON (0/1)
bit 7: Channel 8 OFF / ON (0/1)
Encoder
Major BOS 4a has an integrated encoder for call 1 and call 2. The calls for each channel
are transmitted directly with the corresponding buttons on the keyboard (RUF 1 or RUF2).
The calls are transmitted as long as the corresponding button is being pressed.

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External Signalling Device
An external signaling device can be connected to Major BOS 8a. The sensitivity of the
potential-free inputs can be adjusted with the potentiometer P11.
By activating the corresponding PTT button input (PTT3) the external signal is transmitted
to the selected radio channel(s). Here, an additional external switch contact can be
connected as PTT button.
Transmitter Control
The transmitters of the selected radio channels are activated with one of the PTT buttons
(e.g. handset or headset) and stay activated as long as the PTT button is being pressed.
During transmitting the corresponding transmitters are automatically activated.
It is always possible to transmit on non-activated radio channels by using the red PTT
buttons on the control panel.
The transmitter control can be switched to ground or to +12V. The logic of the PTT button
outputs can be configured separately for each radio with the jumpers J10 to J17. By
using the open-collector outputs it is easily possible to connect several Major BOS 8a
in parallel circuit.
Connection to Telephone AF
The audio-frequency connection is not integrated in the Major BOS 8a anymore. But
by connecting the external headset-adapter the headset can be used as a combined
communicating device for telephone and radio.
The headset is switched to the telephone by an opto-coupler input, which has to be
programmed accordingly (see section Opto-Coupler Input).
Microphone Selection
For each of the 3 PTT inputs it is possible to program the corresponding microphone
individually in register 052. Additionally there are two ways of automatic headset
detection:
- the PTT2 input can be programmed as headset detection (programming register 04C)
- the Major BOS 8a can detect if a headset is connected by measuring the headset
supply voltage (programming register 051/052).
The threshold level in register 051 has to be set so that the measured supply voltage
(at ST10 between Pin 2 and 5) without headset is higher and with headset is lower than
the threshold level. If the PTT2 input is used as headset detection the Major BOS 8a
detects the headset when the input is activated (bridge to ground (GND)). If the Major
BOS 4a has detected a headset then all buttons programmed as SH/HS-PTT use the
headset microphone. Otherwise they use the gooseneck microphone.
Channel Selection (additionally)
In register 04E you can program whether the loudspeaker is turned on simultaneously
when activating the radio circuit. In register 04F you can program whether the loudspeaker
is turned off simultaneously when deactivating the radio circuit.

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Opto-Coupler Input
The Major BOS 8a has an opto-coupler input at connector ST14a. This opto-coupler
input can be programmed with different functions.
a) If this register is encoded to value ´00´, the opto-coupler input switches the handset/
headset to the audio-frequency-connection when activated (standard function, see
section Connection to Telephone AF).
b) The opto-coupler input can also be used to emulate certain key functions
of the switch panel or to enable switching functions for special applications.
To do this the assignment to the radio channels is coded at the 1st digit (high-nibble) in
EEPROM register 047. At the 2nd digit (low-nibble) the key function resp. the special
function which is to be emulated, is encoded:
register 047 Opto-coupler input
Special function
00 = control the telephone relais
10 = microphone switching for PTT2
PTT2 transmits via gooseneck microphone, when opto-
coupler is turned on
20 = microphone switching for PTT2
PTT2 transmits by gosoeneck microphone when
opto-coupler is turned off
1st digit Assignment to
0 = all activated radio channels
1..8 = radio channel 1..8
2nd digit emulated key / special function
0 = (-no function -)
1 = radio channel (selction)
2 = volume higher
3 = volume lower
4 = loudspeaker ON / OFF
5 = call 2
6 = call 1
7 = transmit (gooseneck microphone)
8 = transmit (microphone of handset/headset)
9 = transmit (external encoder)
A = special functions button
B = transmit (SH or HS-micro), PTT2 selects micro
C = transmit (SH or HS-micro), switching by automatic
headset detection
To activate the opto-coupler input direct current (3V < U < 15V) is necessary that can be obtained
directly from ST14a/2. For higher ext. switching voltages an additional external dropping resistor
is necessary (internal dropping resistor = 1kohm).

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Connecting several Major in Parallel Circuit
As the AF outputs are only open during transmission and the AF inputs can be switched
to high-resistance by pulling the jumpers J1 to J4, it is possible to connect several Major
BOS 8a in parallel.
Therefor, all connections to the single radio circuits (TX-AF, RX-AF, squelch and transmitter
PTT) have to be connected in parallel (bus- or hub-wiring).
Here the busy lines of the radio channels, which can only be connected with other control
sets, have a special function.
Activating the Busy Lines
Each control set, which is connected to the corresponding busy line, can signalize to other
control sets in parallel circuit, if a radio channel has already been selected and/or if a radio
channel is already used for transmitting.
a) In the EEPROM register 02B it is possible to make a configuration for the radio channels
1..8 (bit 0..7) so that the corresponding busy line is activated if the circuit is selected.
register 02B activate busy line if circuit is selected
bit 0: circuit 1 NO/YES (0/1)
bit 1: circuit 2 NO/YES (0/1)
bit 2: circuit 3 NO/YES (0/1)
bit 3: circuit 4 NO/YES (0/1)
bit 4: circuit 5 NO/YES (0/1)
bit 5: circuit 6 NO/YES (0/1)
bit 6: circuit 7 NO/YES (0/1)
bit 7: circuit 8 NO/YES (0/1)
b) In the EEPROM register 02C it is possible to make a configuration for the radio chan-
nels 1..8 (bit 0..7) so that the corresponding busy line is activated when transmitting (on
this channel).
register 02C activate busy line during transmission
bit 0: circuit 1 NO/YES (0/1)
bit 1: circuit 2 NO/YES (0/1)
bit 2: circuit 3 NO/YES (0/1)
bit 3: circuit 4 NO/YES (0/1)
bit 4: circuit 5 NO/YES (0/1)
bit 5: circuit 6 NO/YES (0/1)
bit 6: circuit 7 NO/YES (0/1)
bit 7: circuit 8 NO/YES (0/1)

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Actions on Detection of Busy Lines
Each control set, which is connected to the corresponding busy line, detects an activated
busy line and reports this optically to the user as a blinking channel selection LED or as
a blinking TX LED.
This optical display can be configurated in EEPROM register 02D for the radio channels
1..8 (bit 0..7).
register 02D optical busy-LED for
bit 0: circuit 1 as blinking channel selection LED / TX LED (0/1)
bit 1: circuit 2 as blinking channel selection LED / TX LED (0/1)
bit 2: circuit 3 as blinking channel selection LED / TX LED (0/1)
bit 3: circuit 4 as blinking channel selection LED / TX LED (0/1)
bit 4: circuit 5 as blinking channel selection LED / TX LED (0/1)
bit 5: circuit 6 as blinking channel selection LED / TX LED (0/1)
bit 6: circuit 7 as blinking channel selection LED / TX LED (0/1)
bit 7: circuit 8 as blinking channel selection LED / TX LED (0/1)
You can also configure how the Major BOS 8a treats busy radio channels: e.g. the trans-
mitter PTT can be disabled and/or the receiver-AF for the loudspeaker (and the RX-AF
output) can be muted:
a) In EEPROM register 02E it is possible to make a configuration for the radio channels
1..8 (bit 0..7)so that the PTT is disabled when the radio channel is busy.
register 02E PTT is disabled when the channel is busy
bit 0: circuit 1 NO / YES (0/1)
bit 1: circuit 2 NO / YES (0/1)
bit 2: circuit 3 NO / YES (0/1)
bit 3: circuit 4 NO / YES (0/1)
bit 4: circuit 5 NO / YES (0/1)
bit 5: circuit 6 NO / YES (0/1)
bit 6: circuit 7 NO / YES (0/1)
bit 7: circuit 8 NO / YES (0/1)
b) In EEPROM register 02F it is possible to make a configuration for the radio channels
1..8 (bit 0..7) so that the loudspeaker-AF is muted when the radio channel is busy.
register 02F loudspeaker-AF is muted when the channel is busy
bit 0: circuit 1 NO / YES (0/1)
bit 1: circuit 2 NO / YES (0/1)
bit 2: circuit 3 NO / YES (0/1)
bit 3: circuit 4 NO / YES (0/1)
bit 4: circuit 5 NO / YES (0/1)
bit 5: circuit 6 NO / YES (0/1)
bit 6: circuit 7 NO / YES (0/1)
bit 7: circuit 8 NO / YES (0/1)

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Monitoring-Interface TBBox4 (Accessories)
The optional monitoring-interface TBBox4 can be looped in to max. 4 radio channels in
order to connect a multi-track voice recorder and/or to interpret or transmit signaling on
the radio channels with the help of a PC if the TBBox4 is equipped with the corresponding
UGA-modules (option)(using a modem).
For this purpose the external PC is connected by the integrated RS232-interface of the
TBBox4.
Together with the Major BOS 8a certain calls like tone sequences or single tones (e.g.
call 1, call 2), which are preprogrammed in the TBBox4, can be evaluated. The evaluation
status is transmitted to the Major BOS 4a by the I²C-Bus (connector ST14).
If the evaluation status is to be transmitted to several Major BOS 8a or controlling the tape
relay of the TBBox4 is used by several Major, their control inputs have to be connected to
the I²C-Bus-concentrator I2C-Con.
For programming the TBBox4 see manuals Monitoring-Interface TBBox4 and
Universal-encoder/decoder-module UGA00.
Assigning Circuits to the UGA-Modules
Each TBBox4 can be equipped with max. 4 UGA-modules, so that up to 8 UGA-modules
are available for decoder functions when 2 TBBox4 units are connected..
The individual radio channel numbers (´01´...´04´) in the EEPROM registers 031...038
can be assigned freely to these 8 UGA-modules. If no radio circuit is to be assigned to a
certain UGA-module set the radio channel number to value ‘00’.
Assigned radio channel number for
register 031 UGA(1)/TBBox4(1)
register 032 UGA(2)/TBBox4(1)
register 033 UGA(3)/TBBox4(1)
register 034 UGA(4)/TBBox4(1)
register 035 UGA(1)/TBBox4(2)
register 036 UGA(2)/TBBox4(2)
register 037 UGA(3)/TBBox4(2)
register 038 UGA(4)/TBBox4(2)
Ex factory the EEPROM registers 031...034 are programmed in sequence with the radio
channel numbers 01...04 and the EEPROM-registers 035...038 with the value ‘00’ (no
radio channel assigned).

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Decoder Functions
Each TBBox4 can be equipped with max 4 UGA-modules, so that up to 8 UGA-modules
are available for decoder functions when 2 TBBox4 are connected.
Each UGA-module can be programmed so that when certain signalings (single tones, tone
sequences) are decoded either one of the two switching outputs DEC1 or DEC2 briefly
(e.g. 1 sec)switches to ground (GND). See manuals Monitoring-Interface TBBox4 and
Universal-encoder/decoder-module UGA00.
The status of the switching outputs DEC1 and DEC2 of all UGA-modules is transmitted to
the Major BOS 8a and causes the loudspeaker-AF of the corresponding radio channels
to be turned on(if it was turned off before):
a) If the switching output DEC2 is turned on because of the UGA-decoding, then the
loudspeaker-AF of the corresponding radio channel is turned on permanently.
b) If the switching output DEC1 is turned on because of the UGA-decoding, then the
loudspeaker-AF of the corresponding radio channel is turned on for the duration T. The
duration T can be programmed separately for the radio channels 1..8 in the EEPROM
registers 03D...044 in steps of seconds (Value coded as HEX-Number in seconds).
register 03D radio circuit 1
register 03E radio circuit 2
register 03F radio circuit 3
register 040 radio circuit 4
register 041 radio circuit 5
register 042 radio circuit 6
register 043 radio circuit 7
register 044 radio circuit 8
Ex factory the EEPROM registers 03D...044 are programmed with the Hex-value ‘0A’
(10*1sec=10sec).
Tape Control (switching contact)
The switching contact for controling the tape (Start/Stop) can be configured separately for
each of the two TBBox4 units.
In EEPROM registers 039 and 03A you can code which radio circuits 1..8 (bit 0..7)
control the audio tape switching contact of the TBBox4(1) and TBBox4(2).
register 039 audio tape switching contact TBBox4(1) controlled by
bit 0: circuit 1 NO/YES (0/1)
bit 1: circuit 2 NO/YES (0/1)
bit 2: circuit 3 NO/YES (0/1)
bit 3: circuit 4 NO/YES (0/1)
bit 4: circuit 5 NO/YES (0/1)
bit 5: circuit 6 NO/YES (0/1)
bit 6: circuit 7 NO/YES (0/1)
bit 7: circuit 8 NO/YES (0/1)

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Tape Control (continued)
register 03A audio tape switching contact TBBox4(2) controlled by
bit 0: circuit 1 NO/YES (0/1)
bit 1: circuit 2 NO/YES (0/1)
bit 2: circuit 3 NO/YES (0/1)
bit 3: circuit 4 NO/YES (0/1)
bit 4: circuit 5 NO/YES (0/1)
bit 5: circuit 6 NO/YES (0/1)
bit 6: circuit 7 NO/YES (0/1)
bit 7: circuit 8 NO/YES (0/1)
The tape control switching contacts are activated with each PTT or squelch/carrier
detection of the corresponding radio channels. After discontinuation of these conditions
they are deactivated automatically after the delay time T.
The delay time T can be programmed separately for the tape control switching contacts
of the TBBox4(1) resp. TBBox4(2) in the EEPROM registers 03B resp. 03C in steps
of 100ms.
Delay time T = N*100ms (enter as Hex-value!!!)
Register 03B Delay time for tape control switching contact TBBox4(1)
Register 03C Delay time for tape control switching contact TBBox4(2)
Ex factory the EEPROM-registers 03B and 03C are programmed with the Hex-value „32”
(50*100ms = 5sec).
The own tape control switching contact (ST12 / Pin2) is activated as long as one of the
two TBBox4 switching contacts is activated.
Functions for TETRA Digital Radios (Software V5.2 and newer)
Using TETRA, speaking is not pssoible until the conversation is initiated. Therefor, the radio
transmits an attention tone. Usually, this tone cannot be heard in the loudspeaker as it is
muted when transmitting. If transmitting using handset or headset the tone can be heard
in the earphone. When the gooseneck microphone is used the toe cannot be heard.
In the new register 054 it can be programmed if an analogue (0) or a digital (1) radio is
connected. If the radio is programmed as analogue, the usual settings are applied. If it is
programmed as digital, the loudspeaker is not muted during transmission with the goo-
seneck microphone (ONLY with the GN microphone) to this radio. ALL currently activated
radio circuits can still be heard on the loudspeaker during the conversation.
The programming of registers 020 and 021 also is of importance for transmission on a digital
circuit. Usually, in register 020 the same value as in register 054 has to be programmed.
Register 021 allows to turn off other radio circuits during transmission.

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Programming Example:
radio circuits 1-6: analogue, radio circuit: 7-8 digital
Only the circuit of the current conversation is to be heard on the loudspeaker
register 020: C0
register 021: 00
register 054: C0
The values to program in all 3 registers are calculated as follows:
circuit 1: 1
circuit 2: 2
circuit 3: 4
circuit 4: 8
The numbers of all selected circuits have to be added and the result is programmed in the
second digit of the register.
circuit 5: 1
circuit 6: 2
circuit 7: 4
circuit 8: 8
The numbers of all selected circuits have to be added and the result is programmed in
the first digit of the register.
Numbers 10-15 are programmed as letters A-F (10=A, 11=B, 12=C,13=D, 14=E, 15=F).
Switching Matrix for Circuit Forwarding (optional)
The additional functions for radio circuit forwarding are controlled by long pressing of
the the circuit's selection and loudspeaker buttons. MBOS 8a allows to transmit an
incoming AF of one circuit to the same (RS1) and/or to any other circuit (RS2). Here,
only one channel is receiving in order to avoid feedback. Controlling the transmitter can
be done by carrier or by AF with a delay time. After decay of the carrier or at the end of
the AF decay time the transmitters are turned off and the initiation of new forwarding is
blocked for a programmable time
The circuits that are acitvated for forwarding are indicated by fast flashing of the lower
volume LED. Long pressing of the selection buttons toggles the status of the circuit
from forwarding active (LED flashes) to forwarding off (LED on or off depending on
the volume). Long pressing of a loudspeaker button activates a combination of circuits
defined in the EEPROM. At least one of the loudspeaker buttons should be programmed
with '00' to be able to turn off all active forwarding operations.
Current forwarding is indicated on the display by fast flashing of the transmission LED.
The programming of all parameters is acheived form the PC via the RS 232 interface
using a terminal program. The EEPROM registers > 100 are adressing the EEPROM on
the switching matrix board.
The RS1 function is active if exactly one circuit is active for forwarding and the
respective BIT in register 113 is programmed properly. If the corresponding BIT in
register 112 is programmed, forwarding of this circuit to all other circuits always results
also in forwarding to the original circuit (RS1).

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Starting with software version V3.8 of the Major BOS 8 main board forwarding to
certain circuits can also be activated and deactivated via the RS232 interface. Therefor,
there is the new command '$Kxx'. xx (00-FF) corresponds to the active circuits as also
programmable in registers 080-087
Ab Software Version V3.8 der Major BOS 8 Hauptplatine lassen sich die Überleitkreise
auch durch die RS232 aktivieren und deaktivieren. Dazu gibt es den neuen Befehl
‚$Kxx‘. xx (00-FF) entspricht dabei den aktiven Kreisen wie auch im Register 080-087
programmierbar.
Example: $K00: no forwarding , $K03: forwarding to circuits 1+2
New Registers in MBOS 8a:
register 048: time for long pressing, (HEX) nn * 10ms
Example: 64 (HEX) = 100 (DEZ) * 10ms = 1s
register 080: predefined circuits to which forwarding is active upon long pressing of
loudspeaker button (of circuit 1)
BIT0 = circuit 1 ..... BIT7 = circuit 8
reg. 081-087: same as Register 080 for loudspeaker buttons of circuits 2-8
reg. 100-107: threshold value for AF detection (circuit 1-8)
reg. 108-10F: delay time for AF detection (circuit 1-8, nn*50ms)
Example: 14 (HEX) = 20 (DEZ) * 50ms = 1s
register 110: forwarding mode for circuits 1 (BIT0) - 8 (BIT7)
BIT=0: AF-controlled, BIT=1: carrier controlled
register 111: blocking time after end of forwarding until new forwarding operations
are possible, nn*10ms
Example: 32 (HEX) = 50 (DEZ) * 10ms = 500ms
register 112: RS1 additionally to RS2 for this circuit
BIT0 = circuit 1 ..... BIT7 = circuit 8
register 113: RS1 only if exactly one circuit is activated for forwarding
BIT0 = circuit 1 ..... BIT7 = circuit 8

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Service Program
The Major BOS 8a has a RS-232-interface with the following specifications:
19200 Baud, 1 startbit, 8 databits, no parity, 1 stopbit
The connectors for the RS-232-interface (RXD, TXD, GND) are located on the 8-pin
RJ45-plug ST15 inside. See section Sockets Pinout.
To use the service program, a simple terminal or a PC with terminal program has to be
connected to this RS-232-interface.
For this purpose the data format resp. the interface has to be set to the above mentioned
specifications.
If Windows is installed on your PC, you can configure the standard Windows terminal
program (e.g. Hyperterminal) accordingly, choosing the option protocol = X on / X off.
(Therfore you only have to connect the three pins RXD, TXD and GND.
If the terminal (or the PC) is connected correctly, you will have access to the service
program and to a range of service commands for:
- programming mode EEPROM
- software reset
To start the service program just enter <$A2>, <return>. The following text will appear on
the screen:
Online - Monitor PIC 16F877A Software ‚MBOS8a‘ V 2.0
vom {Datum} (C) FunkTronic ‚01-07
Rxxx Read EEPROM Register xxx
Pxxx:yy Program yy in EEPROM Register xxx
X Reset
#
Please note: the character _ means <space> resp. <blank>.
Monitor Status
The service program will usually be locked after the device has been turned on
(monitor status = ´00`). In this case the service program has to be started by entering
<$A2><CR>(=Enter). Then the monitor menu ( see above) appears on the screen.
If the Major BOS 8a is to be programmed or controlled automatically by a PC or a control
center computer it may be useful for the monitor function to be immediately available
when turned on (monitor status = ´01`or ´02`).