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RTB6211D
UHF FULL DUPLEX
BASE STATION
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OPERATORS MANUAL
(Preliminary)
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RTB6211D SYNTHESISED BASE STATION
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CONTENTS
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INTRODUCTION .................................................................................................................................................
3
Front Panel ..........................................................................................................................................................
4
Rear Panel ...........................................................................................................................................................
6
Connector pinouts and switch information ...........................................................................................................
7
AC Power inlet 7 ..........................................................................................................................................................
12V DC INPUT 7 .........................................................................................................................................................
Audio Inputs 7 ..............................................................................................................................................................
Audio Outputs 7 ...........................................................................................................................................................
Radio Control/Interface 7 .............................................................................................................................................
DIP Switches 8 .............................................................................................................................................................
Antenna Connections 8 ................................................................................................................................................
Duplexer Connections (Optional module) 8 ................................................................................................................
Front panel USB Interface ...................................................................................................................................
9
Operation .............................................................................................................................................................
10
Duplexer module ..................................................................................................................................................
11
General performance/Specifications ....................................................................................................................
12
Technical description ............................................................................................................................................
13
Circuit Diagrams ..................................................................................................................................................
14
Warranty ..............................................................................................................................................................
15
WEEE & RoHS information ..................................................................................................................................
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WEEE Directive 16 ......................................................................................................................................................
RoHS Directive 16 .......................................................................................................................................................
Declaration of Conformity (CE) ............................................................................................................................
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About this manual/Contacting Raycom ................................................................................................................
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RTB6211D Page !2
1. INTRODUCTION
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The Raycom RTB6211D is a synthesised Full Duplex NBFM/NXDN Digital Base Station designed for
continuous operation. It is specifically designed to meet the requirements of both Studio and Outside
Broadcast. The standard unit can be software configured for channels in the 440 - 470 MHz range.
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Analogue FM channels can operate in narrow or standard modes with 12.5 and 25kHz spacing. In NXDN
digital mode, channel spacing can be 6.25 or 12.5kHz for extremely efficient use of bandwidth.
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Either radio can operate in receive or transmit mode, with continuous output powers up to 5W in analogue or
digital mode.
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The 1 U 19” rack mount unit has the following key features :-
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• Efficient NXDN digital or analogue modulation systems
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• True 6.25 kHz Channel Spacing Operation (NXDN mode)
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• Auto-senses received mode (Digital or Analogue)
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• The unit will provide continuous output power of up to 5 watts RF per radio PC
programmable
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• The internal switched mode power supply operates without adjustment over the range 90 240Vac, provision is made for an external supply of 13.8Vdc via rear panel socket.
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• XLR industry standard audio input/output connectors are provided for patching to hard-wired
comms. Systems.
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• Line in / Line out at 600Ω. 0DBm.
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• LED indicators monitor audio in, audio out.
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• Long service/adjustment interval.
RTB6211D Page !3
2. Front Panel
1. Mini type B USB Socket. Used for programming of Radio 1 with KPG-141D software. Programming
is covered in the software help files.
2. LCD display showing status or Radio 1
3. TRANSMIT LED. When LED shows green, Radio 1 transmit is ACTIVE.
4. TRANSMIT push button for Radio 1. Press to activate transmission for Radio 1. Press again to
release transmit (de-activate) and enter receive mode.
5. CHANNEL UP button for Radio 1. Pressing selects next highest programmed channel. This button
has no action when Radio 1 transmit is active. This button can also affect Radio 2 - see UNLOCK
button function.
6. CHANNEL DOWN button for Radio 1. Pressing selects next lower programmed channel. This
button has no action when Radio 1 transmit is active. This button can also affect Radio 2 - see
UNLOCK button function.
7. UNLOCK LED. When illuminated green, the channel up and down buttons of each radio are linked.
This synchronises channel up/down between the radios.
8. UNLOCK push button. Pressing selects UNLOCK mode. When UNLOCK LED is illuminated green,
the channel up and down buttons of each radio are linked. This synchronises channel up/down
between the radios. This mode is automatically cancelled if either radio enters TRANSMIT active
mode. UNLOCK cannot be selected if either radio is in TRANSMIT active mode.
9. CHANNEL UP button for Radio 2. Pressing selects next highest programmed channel. This button
has no action when Radio 1 transmit is active. This button can also affect Radio 1 - see UNLOCK
button function.
10. CHANNEL DOWN button for Radio 2. Pressing selects next lower programmed channel. This
button has no action when Radio 1 transmit is active. This button can also affect Radio 1 - see
UNLOCK button function.
11. Mini type B USB Socket. Used for programming of Radio 2 with KPG-141D software. Programming
is covered in the software help files.
12. LCD display showing status or Radio 2
13. TRANSMIT LED. When LED shows green, Radio 2 transmit is ACTIVE.
14. TRANSMIT push button for Radio 2. Press to activate transmission for Radio 2. Press again to
release transmit (de-activate) and enter receive mode.
15. TALKTHRU LED. When LED is illuminated, TALKTHRU mode is enabled. This mode is only
possible when one radio is in transmit active mode.
16. TALKTHRU push button. Pressing selects TALKTHRU mode. This mode is only possible when one
radio is in transmit active mode. This mode routes the audio output of the receiving radio to the
transmitting radio.
17. R1 PEAK LED. When Radio 1 is in transmit active mode, LED illuminates to show transmitted audio
is present. When Radio 1 is in receive mode, LED illuminates to show presence of received audio.
18. R2 PEAK LED. When Radio 2 is in transmit active mode, LED illuminates to show transmitted audio
is present. When Radio 2 is in receive mode, LED illuminates to show presence of received audio.
19. SUPPLY LED. When illuminated green, the base station has power (from either DC or AC inputs).
RTB6211D Page !4
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RTB6211D Page !5
3. Rear Panel
1. M4 stud. Connect to earthing system in rack.
2. IEC C14 inlet with fitted 2A type T 20mm fuse. Compatible with standard IEC C13 'computer' cable.
3. 4 pin XLR male chassis socket for 12V supply input. Internally protected by 15A non resetting fuse.
4. 3 pin XLR female socket for Radio 2 audio input. Electronically balanced.
5. 3 pin XLR male socket for Radio 2 audio output. Electronically balanced.
6. 3 pin XLR female socket for Radio 1 audio input. Electronically balanced.
7. 3 pin XLR male socket for Radio 1 audio output. Electronically balanced.
8. D-type 9 way socket for Radio 1 control/interface.
9. D-type 9 way socket for Radio 2 control/interface.
10. 4 way DIP switch. Used to set power on state for various base station features.
11. BNC 50 Ohm socket. Radio 2 antenna connection.
12. BNC 50 Ohm socket. Low frequency input/output for optional duplexer. Normally connected to
Radio 2 antenna connection with short U link cable.
13. BNC 50 Ohm socket. Antenna connection for optional duplexer.
14. BNC 50 Ohm socket. High frequency input/output for optional duplexer. Normally connected to
Radio 1 antenna connection with short U link cable.
15. BNC 50 Ohm socket. Radio 1 antenna connection.
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RTB6211D Page !6
4. Connector pinouts and switch information
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All connector drawings are shown as viewed from the rear of the chassis.
AC Power inlet
Fused IEC C14 inlet. Connect to an AC supply 90-264V, 47-63Hz. For other
frequencies/voltages please consult Raycom. Fuse is 2A 20mm ceramic cartridge
type. Tripping characteristic T (anti surge). A spare may be located in the fuse drawer.
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12V DC INPUT
4 Pin XLR Male for connection to 12V (vehicle battery) supply. This input is diode 'OR'ed with the 12V
internal AC power supply module. A DC input of more than 12V will mean the
base station takes its supply from the DC input whether the AC supply is
connected or not. The DC input is protected by a non resetting 15A PCB fuse.
Connecting the wrong (negative) polarity to this input will cause the fuse to fail.
The recommended mating connector is Neutrik NC4FX.
Pin 1 0V – Connected to chassis/ground
Pin 2 No Connection
Pin 3 No Connection
Pin 4 12V DC Input
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Audio Inputs
3 Pin XLR female for balanced audio input. Input impedance is 600Ohm. If
unbalanced input is required, connect pin 3 to pin 1. The recommended mating
connector is Neutrik NC3MX.
Pin 1 Ground/screen. Connected to chassis.
Pin 2 Electronically balanced +/hot
Pin 3 Electronically balanced -/cold
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Audio Outputs
3 Pin XLR male for balanced audio output. Output impedance is 600Ohm. This
output is not floating. If unbalanced output is required, leave pin 3 unconnected –
do not connect to ground. Output impedance is 300Ohm in this case. The
recommended mating connector is Neutrik NC3FX.
Pin 1 Ground/screen. Connected to chassis.
Pin 2 Electronically balanced +/hot
Pin 3 Electronically balanced -/cold
Radio Control/Interface
9 Pin D-type female. Pins 2/3 require standard RS232C levels. Pins 1,6
& 7 are connected in parallel to the front panel buttons. De-bounce
RTB6211D Page !7
1 5
96
FUSE
circuitry is provided. Do not connect these pins to a voltage source, otherwise damage to the source or base
station may occur. Pin 8 is connected direct to the FNC6 AUX I/O pin of the radio. The function of this pin
can be programmed according to customer requirement.
Pin 1 Transmit (momentary connect to ground)
Pin 2 RS232 TXD (Output)
Pin 3 RS232 RXD (Input)
Pin 4 No Connection
Pin 5 Ground/screen. Connected to chassis.
Pin 6 Channel UP (momentary connect to ground)
Pin 7 Channel DOWN (momentary connect to ground)
Pin 8 Radio FNC6 (I/O from radio)
Pin 9 No Connection
DIP Switches
The DIP switches set the power on state of a number the base station
functions. When either AC or DC power are applied, the base station
will start in the preset state.
1. Radio 1 transmit. Position B, transmit is not active.
Position A, transmit is active.
2. Radio 2 transmit. Position B, transmit is not active.
Position A, transmit is active.
3. TALKTHRU. Position B, TALKTHRU is not active.
Position A, TALKTHRU is active.
4. Not used.
Antenna Connections
BNC female 50Ohm connectors. Transmit/receive for each radio. Connect to a
suitable antenna/filter/duplexer with good quality coaxial cable. Alternatively,
connect to optional internal duplexer module with short U link cables provided.
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Duplexer Connections (Optional module)
The optional duplexer module allows connection of the two radios to a single
antenna system. When fitted, link the radio antenna ports to the adjacent duplexer
port with the provided U link cables. The duplexer antenna port should be
connected to the antenna system.
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RTB6211D Page !8
A
B
1 2 3 4
5. Front panel USB Interface
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The RTB6211D has a pair of USB connectors on the front panel, adjacent to the display for each radio. Marked PROG,
these connectors are used for programming each radio with the KPG-141D configuration software. All radio
parameters, such as channel frequencies, spacing, power, modulation type etc are set with this software. Use of the
software is covered in the software help files. Please consult Raycom for further information.
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The USB connector is a mini type B USB socket. Standard USB cables are readily available to connect these ports to a
computer. Internally, the RTB6211D uses FTDI FT232R chips to communicate with the radio. Drivers for these chips,
if not already installed on the host computer, are usually downloaded automatically by the operating system (normally
Microsoft Windows). If the drivers are not on the computer and an internet connection is not available, drivers can be
downloaded from the FTDI web site:
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http://www.ftdichip.com/FTDrivers.htm
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Make sure to choose the VCP (virtual com port) driver. The FTDI chips in Raycom RTB6211D base stations are
configured with a common serial number. This ensures that the host computer always allocates the same COM Port
number to the USB port, making programming easier. However, this does mean that it is not possible to have both USB
ports connected to the same host computer. If both are connected, only one will be recognised.
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RTB6211D Page !9
6. Operation
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RTB6211D Page !10
7. Duplexer module
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RTB6211D Page !11
8. General performance/Specifications
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Frequency Range 400-470 MHz
Number of Channels 260
Channel Spacing Analogue : 25 kHz/20 kHz/12.5 kHz
Channel Spacing - Digital - Wide/Narrow 12.5 kHz/6.25 kHz
Frequency Stability ± 1 ppm (-30 °C to + 60 °C)
Operating Temperature Range -30 °C to + 60 °C
Operating Voltage (DC) 12V DC (11.5 ~ 15.6 V DC)
Operating Voltage (AC) 90 - 240Vac
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Receiver
Adjacent Channel Selectivity (Analogue) 78 dB at 25 kHz
76 dB at 20 kHz
68 dB at 12.5 kHz
Sensitivity Digital @ 3% BER:
0.28 µV at 12.5 kHz
0.20 µV at 6.25 kHz
1% BER:
-2 dB µV at 12.5 kHz
-5 dB µV at 6.25 kHz
Sensitivity (Analogue) - EIA 12 dB SINAD 0.25 µV
Sensitivity (Analogue) - EN 20 dB SINAD -3 dB µV
Spurious Response Rejection (Analogue) 80 dB
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Transmitter
RF Power Output 0-5 W
FM Noise (EIA) Analogue:
50 dB at 25 kHz
50 dB at 20 kHz
45 dB at 12.5 kHz
Modulation Distortion Less than 3%
Modulation Limiting Analogue:
± 5.0 kHz at 25 kHz
± 4.0 kHz at 20 kHz
± 2.5 kHz at 12.5 kHz
Spurious Emission (EN) -36 dBm ≤ 1 GHz
-30 dBm > 1 GHz
Spurious Response (EIA) 80 dB
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9. Technical description
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RTB6211D Page !13
10. Circuit Diagrams
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11. Warranty
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RTB6211D Page !15
12. WEEE & RoHS information
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WEEE Directive
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The European Community WEEE directive No. 2002/96/EC covers the safe disposal of Waste Electrical and Electronic
Equipment at the end of its useful life. It places certain obligations on the producer of the product.
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The end-user should return this product (RTB6211D) for correct disposal when it becomes waste (end of life). As
required, we operate a like for like take-back scheme for equivalent products bought before 13th August 2005 when
being replaced by this Raycom product - we can take-back waste equipment who's origin is a different producer.
Products bought after that date are to be returned to their own producer or distributor. Raycom is not responsible for the
cost of returning any equipment.
RoHS Directive
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The EU Directive No. 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and
electronic equipment (RoHS) took effect on 1st July 2006. It restricts the use of the six substance groups lead, mercury,
cadmium, hexavalent chromium, PBB (polybrominated biphenyl) and PBDE (polybrominated diphenyl ether) for
electrical and electronic products that are put on the EU market.
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This Raycom product (RTB6211D) and included Kenwood radios comply with the RoHS directive.
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RTB6211D Page !16
13. Declaration of Conformity (CE)
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RTB6211D Page !17
14. About this manual/Contacting Raycom
RTB6211D Page !18
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