Antennair BATC DTX1 User manual

‘BATC DTX1’
DVB-S Encoder / Modulator
USER GUIDE Issue 1.1
This Guide should be used in connection with firmware 01.00.00
Copyright 2013 Antennair Limited, Neo House, Shaw Road, OLDHAM OL1 4AW

Contents
Table of Contents
Foreword..............................................................................................................................4
Hardware Installation – Boxed Version.................................................................................4
Bare Board Version..............................................................................................................5
BATC DTX1 – A Quick Guide to Getting Started!.................................................................5
Some words of Caution....................................................................................................5
Housing the Board...........................................................................................................5
Powering the Board..........................................................................................................6
Controlling the Board.......................................................................................................6
Keyboard Connector P1...................................................................................................6
RF Output P3...................................................................................................................7
Audio and Video Inputs....................................................................................................7
Serial Port P16.................................................................................................................7
Getting on Air...................................................................................................................8
Pre-sets............................................................................................................................8
Load from Pre-set........................................................................................................8
Save to Pre-set............................................................................................................8
Menu Navigation..................................................................................................................9
Menu Structure...................................................................................................................10
General Notes on Menu Options and Usage......................................................................14
LED Indicators....................................................................................................................15
Configuration......................................................................................................................15
General..........................................................................................................................15
Time...........................................................................................................................15
Date...........................................................................................................................15
LCD Contrast.............................................................................................................15
Input...............................................................................................................................15
Video Source.............................................................................................................16
Video Signal...............................................................................................................16
Aspect Ratio...............................................................................................................16
Contrast.....................................................................................................................16
Colour........................................................................................................................16
Brightness..................................................................................................................16
Modulator.......................................................................................................................16
RF Frequency............................................................................................................16
RF Level.....................................................................................................................16
RF Mode....................................................................................................................17
FEC............................................................................................................................17
Symbol Rate..............................................................................................................17
Spectral Inversion......................................................................................................17
Encoder..........................................................................................................................18
System Bit-rate Mode................................................................................................18
System Bit-rate..........................................................................................................18
Avg System Bit-rate...................................................................................................18
Audio Bit-rate.............................................................................................................18
Audio Sample-rate.....................................................................................................18
Audio ES Mode..........................................................................................................18
Video Filter.................................................................................................................18
2 Copyright 2013 Antennair Ltd BATC DTX1 (Iss 1.1)

GOP Structure...........................................................................................................19
Names............................................................................................................................19
Channel Names.........................................................................................................19
Network Name...........................................................................................................19
Provider Name...........................................................................................................19
Service...........................................................................................................................19
PMT PID....................................................................................................................19
Video PID...................................................................................................................19
Audio PID...................................................................................................................19
AUX PID.....................................................................................................................19
LCN............................................................................................................................20
Program Number.......................................................................................................20
Trans Stream ID.........................................................................................................20
Network..........................................................................................................................20
Network ID.................................................................................................................20
Orig Network ID.........................................................................................................20
Status.............................................................................................................................20
Program Stream.........................................................................................................20
Table..........................................................................................................................20
Stuffing.......................................................................................................................20
Serial port settings..............................................................................................................21
Serial Command Set..........................................................................................................21
Flashing new firmware via the Bootloader..........................................................................25
Product Support.................................................................................................................26
Appendix 1.........................................................................................................................27
BATC DTX1 (Iss 1.1) Copyright 2013 Antennair Ltd 3

Foreword
This user guide contains basic instructions for installation and operation of both Single and
Dual Channel DTX1 Modulators.
Please read through this document to determine how best to deploy the unit (location,
connections & settings) to suit your intended application.
1. Hardware Installation – Boxed Version
The boxed unit should be located indoors, in a reasonably well ventilated location and
away from direct sources of heat such as radiators, direct sunlight, or excessively hot
electronic equipment. The rear of a dual unit is arranged like this:
(Figure 1) Rear Panel
Connections are arranged in two horizontal rows. The lower row is always present on
both Single and Dual units, whereas the upper row is only present on Dual units. On the
bottom row, connections from left to right are as follows:
1 ‘F’ Connector UHF Output into 50 Ohms coaxial cable.
2 Barrel ROKA Plug 12V 1A DC PSU Input, Centre Positive (+).
3 Yellow PHONO socket Composite Video Input, PAL/ NTSC 75 Ohms
4 Mini DIN Socket S-Video Input, PAL/ NTSC 75 Ohms
5 White PHONO Socket Audio Channel LEFT input 10K Ohms
6 Red PHONO Socket Audio Channel RIGHT input 10K Ohms
7 RJ45 Socket Serial Connection to host - reserved.
(Table 1) Connectors Main
N.B. The group AV1 are the primary input feed.
4 Copyright 2013 Antennair Ltd BATC DTX1 (Iss 1.1)

On the top row from left to right connections are the secondary feed AV2 as follows:
1 Yellow PHONO socket Composite Video Input, PAL/ NTSC 75 Ohms
2 Mini DIN Socket S-Video Input, PAL/ NTSC 75 Ohms
3 White PHONO Socket Audio Channel LEFT input 10K Ohms
4 Red PHONO Socket Audio Channel RIGHT input 10K Ohms
(Table 2) Connectors (Expansion)
In the majority of cases, the only connections used will be DC Power, UHF RF output, and
Video and Sound inputs. You may select whether to use S Video or PHONO video inputs
in the menu options (see later). If a Stereo sound source is not available, using just one of
the two inputs for a Mono source will automatically feed audio to both LEFT and RIGHT
channels of the modulated output, but with reduced input impedance. For best picture
quality choose an S-Video picture source as opposed to composite video where possible.
In all cases use good quality screened leads. Make all connections before powering up
the unit.
The RF Output can be fed directly to a PA or depending on sensitivity you may require an
intermediate amplifier such as a MMIC block. Nominal full power out is -6dBm.
2. Bare Board Version
If you have purchased the 'bare bones' DTX1 board from BATC you will have to provide a
5 button keypad to operate it, or a serial cable to a host PC running a terminal program.
For more details of hardware connections and the serial command set, refer to
http://www.dtx1.info/ where you can also obtain the latest firmware upgrades and other
information.
2.1. BATC DTX1 – A Quick Guide to Getting Started!
2.1.1. Some words of Caution
Please note – the DTX1 PCB contains static sensitive devices. You should take
appropriate care to make sure you don’t damage it. Always work with an ant-static wrist
strap to discharge any static before touching the card even if it’s unpowered. Also, there
are switching power supply circuits on the board which convert the 12V DC input to
various low voltages, which should not be touched during operation (e.g. to see how warm
they might be!) as this might upset the sensitive feedback circuitry, and so cause
excessive voltages and damage to components. The general rule is – don’t touch the
board while it’s working, and don’t zap it while it isn’t!
2.1.2. Housing the Board.
The DTX1 PCB is made up of 6 layers, and contains quite a lot of copper to dissipate
unwanted heat from the various IC’s on it. When fitted in the extruded aluminium case
(also available from BATC) this heat is dealt with by conduction to the slide-in grooves at
the side of the case, and by conduction from the F connector to the rear panel to which it
should be affixed. We aren’t talking about a lot of heat here – the whole thing only takes
about 6 watts – but anything which can be done to reduce the operating temperature
BATC DTX1 (Iss 1.1) Copyright 2013 Antennair Ltd 5

makes for more stable and reliable electronics. So if you are using your own metalwork
(preferred over an ABS box) use metal stand-offs, bolts or whatever to mount the PCB,
and make use of conduction through the F connector, which will help keep the modulator
IC temperature down.
2.1.3. Powering the Board
Supply voltage is +12 Volts nominal, with the CENTRE PIN POSITIVE.
The board will operate reliably from 10 to 15V DC. We recommend a 1A PSU to have
something in reserve, especially you might be adding a secondary encoder at some point.
2.1.4. Controlling the Board
Either a simple keypad, or RS-232 serial commands, may be used. If the cased option is
being built up, this comes with an ‘Antennair Quadrant’ front panel membrane (the DTX1 is
a derivative of a commercially available unit). Simply plug the membrane ribbon connector
into the 6 pin connector on the PCB. If you are making up your own case, connect up 5
buttons (press to make switches) so that they all have one end in common. Wire as per
table below.
2.1.5. Keyboard Connector P1
(Pin 1 is the nearest to the corner of the board)
PIN No. SIGNAL
1 RIGHT
2 DOWN
3 LEFT
4 ENTER
5 UP
6 COMMON
(Table 3) Keypad Connector
6 Copyright 2013 Antennair Ltd BATC DTX1 (Iss 1.1)

2.1.6. RF Output P3
Output is approx -5dBm into 50 Ohms from the 'F' connector at the rear of the board. Do
not short circuit, or allow static charges to damage the output circuit.
2.1.7. Audio and Video Inputs
1V Stereo Audio into 10K Ohms Red and White PHONO, and 1V Video into 75 Ohms
PHONO, or Y/C into 75 Ohms S Video Mini DIN connector. PAL and NTSC supported.
2.1.8. Serial Port P16
(Pin 1 is the furthest from the corner of the board
PIN No. SIGNAL
1 GROUND (via. 10 Ohms)
2 CTS
3 TXD
4 RTS
5 RXD
6 DSR
(Table 4) Serial Connector
For the serial option, make up a cable to your PC, the DTX1 end is wired as follows to an
RJ11 connector. Set your terminal to 115K, N,8,1.
BATC DTX1 (Iss 1.1) Copyright 2013 Antennair Ltd 7

2.2. Getting on Air
2.2.1. Pre-sets
The units has three pre-set locations (memories) where the whole configuration of the unit
can be stored or recalled for quick access to different configurations. As shipped, there
are 3 useful pre-sets already stored in non-volatile memory, called P1 P2 and P3, as
follows:
PRESET
P1 – for 70cms P2 – for 1248 MHz P3 – for 1275 MHz
AV1 AV2 AV1 AV2 AV1 AV2
Frequency 437 MHz 1248 MHz 1275 MHz
Symbol Rate 2 Ms / second 4 Ms / Second 4 Ms / second
FEC 1/2 1/2 3/4
Video in Composite Composite Composite Composite Composite Composite
RF 100% 100% 100%
Provider
name BATC BATC BATC
Network
name DTX1 DTX1 DTX1
Channel
name Call sign
CH1
Call sign
CH2
Call sign
CH1
Call sign
Ch2
Call sign
CH1
Call sign
CH2
PMT PID 0x102 = 258 0x202 = 514 0x102 = 258 0x202 = 514 0x102 = 258 0x202 = 514
Video PID 0x100 = 256 0x200 = 512 0x100 = 256 0x200 = 512 0x100 = 256 0x200 = 512
Audio PID 0x101 = 257 0x201 = 513 0x101 = 257 0x201 = 513 0x101 = 257 0x201 = 513
Aux PID 0x103 = 259 0x203 = 515 0x103 = 259 0x203 = 515 0x103 = 259 0x203 = 515
(Table 5) Pre-sets
2.2.2. Load from Pre-set
Choose the configuration that best suits your requirements from the above table.
Select P1 / P2 / P3 to load the current configuration from that pre-set location.
(Factory default is set to be P1).
2.2.3. Save to Pre-set
If you edit a configuration you may save it to keep the new values. Select P1 / P2 /
P3 to save the current configuration to that pre-set location.
8 Copyright 2013 Antennair Ltd BATC DTX1 (Iss 1.1)

3. Menu Navigation
The menu system allows the user to set up various operating details such as Operating
Frequency, Logical Channel Number (e.g. 555), Time and Date, Video Source type and
Channel Name and so on.
The menu is navigated by a simple 5-button arrangement, whilst observing the LCD at the
left of the front panel. The centre key is the ‘OK’ or ‘Enter’ function.
The left, right, up and down buttons will be referred to as <, >, ^ & vrespectively.
The menu structure for the 'BATC DTX1' (and Antennair 'Quadrant', of which it is a
derivative) is shown in the next 3 pages.
BATC DTX1 (Iss 1.1) Copyright 2013 Antennair Ltd 9

3.1. Menu Structure
10 Copyright 2013 Antennair Ltd BATC DTX1 (Iss 1.1)
GENERAL
** EXIT SETUP **
INPUT
MODULATOR
DATE
LCD CONTRAST
AV Input 1
AV Input 2
VIDEO SOURCE
VIDEO SIGNAL
ASPECT RATIO
COLOUR
BRIGHTNESS
RF CHANNEL
RF LEVEL
SPECTRAL INV
VIDEO SOURCE
VIDEO SIGNAL
ASPECT RATIO
COLOUR
BRIGHTNESS
TIME
RF MODE
FEC
SYMBOL RATE
Standard Menu
If Daughter
Board Present