When Cable & Wireless launched their digital cable service, Interactive TV was the main attraction and focus for the platform.
Cable & Wireless teamed up with Liberate to deploy it’s eNavigator middleware client for their set top boxes. Liberate had already made deals with many US digital platforms for both Motorola and Scientific Atlanta networks, and had partnered with Acer & Thomson/RCA for their own set top box / internet tv devices. These allowed for the internet to be browsed on a TV itself, similar to a webTV or the Bush Internet TV. With that in mind it made sense to go with Liberate for its interactive platform, with many of the interactive being HTML based, essentially being microsites being designed to be useable on a PAL TV screen, as well as being usable on the set top box hardware itself. By using a HTML based system, it would be easy for existing web developers to adapt their websites for cable interactive TV.
The main interactive developer portal, viewed within the Cable & Wireless interactive browser. This also showcases the browser interface, note the lack of address or URL bar, since this service was designed to be a walled garden. Instead a url bar is provided on the developer portal, likely to allow developers to test their websites.
An interesting oversight is if you sent an email with a hyperlink embedded into it to a website such as Lycos or Google, you could use that link to open the browser to that page, and if its a search engine you could use that to load other websites that are not part of the service
Developer Website
Not much to say here, the developer portal provide links to documentation details the requirements and limitations of the TV internet platform. This goes into details the specifics of the Liberate eNavigatior platform.
Viewed in Internet Explorer 5
A look at the services…
Unfortunately the screenshots are of a low quality and resolution since they have been extracted from the PDF documents above but give a general idea of the scope of the service provided. Some screens have the browser banner at the top of the screen, I’m assuming these are portals to the microsites.
Another view of the interactive home screen, this may be from a later redesign
TV Internet Home
Similar to the Open… home screen, provides links to various services available
Sports Main Menu
Provides links to other sports themed websites,
Email Main Menu
Menu options are Check Email, Write Message, not sure of the third items, Drafts? Templates? Deleted?
Email Inbox
The STB had a built in email client, designed for the C&W email service
Two Way TV
Looks like a games service, hard to tell because of the resolution
RAC Breakdown
A resource for traffic information and a route planner
TravelTime
Looks like some sort of holiday broker
Travel
Provide links to holidays, not sure if this goes directly to the sites themselves?
News
News headlines, and weather from various sources.
When the consumer division of Cable & Wireless was acquired by ntl in 2000, the interactive platform continued it’s development. In 2002 ntl deployed the Liberate 1.2 middleware which bought improvements to the browser rendering engine, and the TV guide was rewritten to take advantage. ntl would later spend time developing services for the Langely platform, which was originally planned to use the PowerTV platform, but chose Liberate instead. This was done to ensure parity between the two platforms.
The Sky Guide user interface has been though a lot of changes ever since its launch in October 1998. Being one of the first Digital TV platforms in the UK, however despite having numerous software updates throughout the years, its core design remains the same albeit with certain alterations being made in light of new feature being added to the service.
Screenshots below are captured off a Pace 2500S5 running EPG software version
Search & Scan
Pressing the blue button cycles through the selected favorite channels, Personally I’ve never understood why it cant just open up a small menu showing favorite channels along with what’s being broadcast now, the way it’s been implemented seems like it was tacked on at the last minute, and if you have nearly 50 favorite channels it can take a while to cycle through them all.
If you wondered what the messages button does, It just shows the message above. Originally it was supposed to received broadcast style messages to the digibox, informing customers of any changes to their service
Low battery icon, supported on 2001 and later revision remotes
Sky Guide
TV Guide
Main grid style view, programmes highlighted in white have audio description, this can be changed in the Language & Subtitles menu in the Services section.
Pressing i on the remote brings up a synopsis of the program selected. Also wtf is going on with modern Simpsons?
Sky added further categories in 2005 to accommodate the amount of channels. However in 2021 some of these genres are redundant, there’s only one channel in the Gaming & Dating category for example.
Viewing channels based on genre
No more Lifestyle & Culture channels, Sky merged the genre back into Entertainment
TV Guide: A-Z Listings
Viewing A-Z list of programs by genre. This has always been a mess since the same programme is repeated multiple times due to the advent of +1 and HD simulcasts, Ideally Sky should have combined the same program title into one per channel, instead you can have pages of the same program if it is repeated on multiple channels at different times.
Programs can be viewed by subgenres, which can be selected using the bottom row of colour buttons.
TV Guide: Personal Planner
The Personal Planner was introduced in 2001, and serves as a timer and reminder feature of Sky Guide. Programs can be added here and the digibox will remind you when the program starts. Autoview will make the digibox switch over to the channel automatically, useful for recording programs to a VCR (remember those?). Series Link automatically adds the next program to the personal planner, like the Season Pass feature of the Tivo.
To be honest, I found the Personal Planner to be buggy, many series links will randomly disappear over time.
TV Guide: Favorite Channels
The Digibox can store up to 50 favorite channels, which a separate EPG being introduced that lists the favorite channels exclusively, introduced in the EPG 3.4 update
Box Office
Sadly Sky axed it’s Box Office Pay-Per-View in 2016 in favor of its on demand service. So this part of the guide is now dead.
Services
Shows telephone numbers for broadcasters and departments on Sky. I thought this was a wasted feature since how often do you contact these broadcasters?
A better feature would be to allow the user to enter and save their own phone numbers, then should a contact call, a small message would appear with the callers phone number and name, like a caller display feature. It would certainly give customers a good reason to plug the Digibox into the phoneline. The only time I’ve seen this feature implemented was on a BT Freeview box.
Services: System Setup
Second Location Picture Format refers to the RF2 output, if the second TV is 4:3 with the main set being 16:9
On-Screen icon timeout referrers to the red button props that appear for interactive. Previously the red button icons would stay on screen unless the user pressed the Backup key
Model number referrers to the driver stack implemented on the digibox, and varies for each box model and revision
Version Number – First two characters refer to the Digibox manufacturer, the next two are the major revision (model/CPU chipset), the last two refer to the minor Digibox hardware revision. This field is static and remains the same throughout
Serial Number – identifies the digibox uniquely
Viewing Card Number – Refers to the viewing card number currently inserted
Operating System – the core operating system on the digibox, using a modified OpenTV1.2 with the NucleusOS realtime kernel
EPG Software Version – Version of Sky Guide currently running
Signal Strength – How much signal is being received, determined by the size of the dish, quality and length of the cable run and the quality of the tuner used in the box.
Signal Quality – Signal to noise ratio
Lock Indicator – If the digibox can decode the transport stream
Network ID – Used to identify the satellite the user is on, Astra 28.2 is 0002 with Astra 19.2E being 0001, Hotbird 13E is 013e
Transport Stream – The transponder that the digibox is tuned to
Services: Installer Setup
This menu is hidden in plain view, since it can technically disrupt normal operation of the digibox.
LNB Setup – To change tuning parameters of the LNB if a non standard LNB is being used, not needed if using a Sky Minidish.
Default Transponder – The transponder where the Digibox loads its TV listings upon bootup
Telephone Settings – If the user need to specify a prefix to access the outside line
RF Outlets – To change the RF output channel
Manual Tuning – Manually tune a frequency, similar to Add Channels but shows the signal strength and quality.
Services: Auto Standby
Services: Other Channels
Other Channels lets you add channels that are not on the Sky EPG, but are broadcasting on the 28.2E satellite. These could be regional channels not populated on the guide, or test channels.
In theory you could use this feature to watch channels on different satellite providing your dish is pointed to the satellite. In practice you are limited to two symbol rates (22.0 and 27.5) which restricts what transponders you can tune into (on 19.2E this isn’t much of an issue since Astra frequencies tend to stay consistent). The digibox isn’t a good receiver for this purpose since it wasn’t designed for it, it only barley works with the standard Sky digital service.
Services: Favorite Channels
Lets the customer program up to 50 favorite channels. This was originally 20 channels with the limit being increased in 2005.
Pressing i gives you a channel description, this also appears when you access a channel that you are not subscribed to.
Interactive
MySky
A list of interactive services, or service. Sadly this menu used to be full of different service that were available back in the day (Playjam, Sky Active, QVC, DirectGov, Gky Gamestar)
Unfortunately MySky no longer loads
Pressing i gives you a description of the service
Error Messages
What happens when you disconnect the sat feed, the box cannot load listings, showing that the full listings are not cached in the digibox itself
A weird glitch, BBC Alba and Premier Sports on channel 65535
I believe this is due to a channel being restricted via the encryption, yet the customer is enrolled on the package. Could be due to area/post code restrictions,
Low battery message, supported on v4 remotes and later
Nag screen that appears when you boot up the digibox without a telephone line connected, since Sky have axed all of the interactive services (except for BBCi which does not use the telephone) they might as well remove this prompt
Appers when you switch on the digibox from the mains
All regular Sky digibox’s can only decode MPEG2 SD channels, if you go to an HD channel you simply receive this message. You used to be able to get tv listings for HD channels but Sky remove this to conserve memory since they were running out of EPG spaces
Appears when you insert the viewing card backwards, rumored to charge Sky for the subscription rather than the customer
When you have no signal being received for that channel transponder
Sometimes the digibox can’t load the program information, this message will be diplayed for a few seconds before the synopsis appears.
One of the many Digibox’s Pace produced over the years, and one of the first to have the tuner integrated on the mainboard, previous models had the tuner enclosed on a separate metal box fixed onto the board, or as a ZIF style socket module.
Pace 2500S digibox mainboard
Another box from the same era was the PaceDi4000N for ntl, although this is a cable receiver you can see some similarities in the design.
Pace Di4000 ntl box mainboard
Its quite a minimal clean design compared to the other boxes Pace have produced, like the Di4001
Back to the 2500S5, you can see the CPU of the box
The main, and only processor STi5512SWE. This chip incorporates the CPU (ST20) running at 60Mhz, MPEG2 decoder and graphics processor, basically a receiver on a chip. I’m not sure how it compares to other digibox’s of the era in terms of speed, considering this box was made in 2002.
ST processors were stupidly popular in many satellite receivers, and this one seems to be an NDS variant
Not sure what this chip does, maybe I/O for the RS232 port?
The unused PCMCIA slot
Flash memory chips (right) that store the EPG software and operating system. Each chip is 2Mb for a total of 4Mb Flash. There are two unpopulated banks for a potential of 8Mb. The chip at the top left, above the Omega chip is part of the RAM.
View of the dual card slots, the bottom is for the viewing card, whilst the top is for the interactive card.
ESS Teledrive ES2898S
Appears to be the modem used for the Digibox’s return path. This allows for the digibox to communicate back to Sky for box office events and interactive. Unsure of the port on the right
The front of the box with the panel removed, showing the location of the remote sensor
Connecting an old ntl box running ancient (by cable standards) software to a modern Virgin Media network. Whilst Virgin Media is the sucessor to ntl there are a few possible roadblocks to this;
VM no longer broadcast their channels in MPEG2 with the exception of a few off air slates and radio channels.
The DVB-SI that VM broadcast may not be consistent with what the software is expecting
The STB itself may be looking for something that VM are no longer transmitting
Getting the box to boot was a struggle itself, just connecting it to a cable feed is not enough since the box will get stuck on the starting up screen, I left it overnight and the box was still trying to start up
Forcing a boot (holding Up+Down and letting go once LDR appears on the display) wouldn’t work either
What worked in the end was to power up the STB will the cable feed disconnected, this will cause the box to display NIT on the front panel LED display. Connecting the coax feed, the box will then proceed to the start up screen and after around 5 minutes a channel will be displayed.
Well the box managed to load something, lets see what we get…
The main EPG, showing the many channels or streams Virgin broadcast
What’s disappointing is nothing can be tuned, you can select a channel but nothing will play, not even radio channels. Potentially this could be the NetID mismatch causing this , since the STB originated from a different area of the network.
Looks like software update streams for the various tivo box models currently in use with Virgin Media.
To breakdown what works and not
Channels Numbers exist but its not the order that Virgin use, the STB seems to place them consecutively in the EPG, i.e starts at 1 and goes up to 350
There are issues selecting channels over 255 in the guide, trying to select a channel number over 255 causes the box to pull a channel from the top section of the EPG, i.e selecting channel 260 causes channel 5 to get selected instead.
Only now and next information is loaded, no further schedule information is available
Subject search does not function
Channel genres do not work, selecting Entertainment or Sports shows no channels.
Various hidden streams and channels appear in the guide
Changing channels using the + and -, the list is out of order and the STB seems to jump between different channels.
Program reminders work and can be set
Maybe changing the Net ID will at least allow the radio channels to be opened
To access the engineering mode, unplug the Virgin media Tivo box and hold down the Up + Down arrow buttons on the front panel to the STB (not the remote), continue holding until Starting Up disappears off the screen, typically around 50 seconds.
Screens were captured through the HDMI output, I’m not sure if tis will work via the Scart connection.
The first frequency the tivo checks when it is booting up, typically contains firmware updates
STB information and local network ID
Various MAC and IP address used by the STB networking interfaces
Signal information
Information found in the DVB signal information tables
Earlier I went though the ntl CR3 Bromley software which was introduced in 2002 and was the basis for ntls new interactive services.
The Pace Di4000 was a redesign of the previous 4001 and 1000/2000 series box. Its worth mentioning that Pace’s model numbers don’t seem to follow a specific scheme, you would assume the Di4001 was the successor to the Di4000, however the Di4001 was the launch box for ntl in Langely areas and was a DAVIC based box, with the Di1000/DiTV1000 being its DOCSIS equivalent for Telewest and ntl Bromley areas.
These early generation boxes were designed around the Hitachi SH3 CPU with C-Cube Chipset for MPEG2 decoding and descrambling. The Di4000 replaces that with the Broadcom demodulator and the Conexant MPEG2 decoder which contains the ARM CPU.
Pace Di4000
Left Pace Di4001, Right Pace 2500 Sky Digibox
The main difference you will notice between the two is the reduction of components, with the Di4000 only having two main processors. The previous generation was split over 5 different processors. this reduction means the mainboard is smaller and the box produces less head as a result. In fact its not too far off an average Sky Digibox.
The Power supply is now separated from the main board, like the Sky Digibox design, allowing for the PSU to be replaced independently from the main board.
The audio out jacks have been removed, no you can no longer connect the box to a Hi-Fi system unless you use a scart breakout adaptor. The design for it still exists on the main board however.
The Serial port and Printer part are removed in favor of a single USB port. the serial port still exists and can be access using a VCR to RS232 adapter.
The second card slot has been removed, this was originally designed for Mondex cashcards.
The remote control protocol now supports IRDA and RC5
Conexant CX22490 – ARM920 based core, 160Mhz – 175MIPS
Broadcom BCM3250KPB – Demodulator
CrystalLAN CS8900A-CQ – Ethernet controller
Conexant Bt861KRF – Video encoder for Scart/AV output
The tuner modules, one for TV and the other for data/DOCSIS modem
Pace Di4000 front panel boardPace Di4000 rear panel
Power Input
Ethernet – For internet connectivity for the internal cable modem
USB port – To connect additional devices, never used officially by ntl or Telewest
IR in/Out – never used by ntl or Telewest
Scart ports
RF Input/Output
Cable Input
Diag Screens
To access these on this box, hold down the Up & Down buttons whilst the STB is booting, and continue to hold them down until you see this screen. The front panel LED display will change to ldr and will then go blank once you have entered diag mode.
Di4000 Setup screen 1
Sets the default frequency which is checked when the stb boots up, this frequency carries the netid for the area and any software updates
Di4000 Setup screen 2
Shows build information about the software loaded, and the hardware identifier of the box.
The replacement to CR2 software that saw the launch of interactive services for the bromley platform, CR3 saw a rewrite of the guide software, with everything now being written in the Liberate browser, and Two Way TV support for downloadable applications, whilst Liberate being used for interactive. This software would form the basis for Langely CR3, and would be the next step in unifying the platforms in terms of feature set.
Sadly not all areas had access to CR3 with former Videotron areas in London being stuck on pre-interactive CR1 blue to the networks inability to support a return path connection. ntl would have to upgrade and repull the network in order to provide support for broadband and on demand services, all of which are dependent on a return path.
The software here is running on a Pace Di4000N
The user interface of ntl digital, not a fan of their purple/pink colour scheme and the bad thing is that its everywhere, thankfully they changed the scheme by the time it can to Langely.
Interesting is the listing for interactive settings, rather than be part of the list it looks like a separate link,
Now & next
Unfortunately the purple makes it’s way onto normal viewing, with the now and next bar
I’m not sure why these early cable TV software did not allow for the volume to be changed via the STB remote, since the Telewest side also did not support changing the volume. One theory was that customer would complain to ntl about how they were unable to her any sound through their TV, unaware that the volume on the analogue box has been set to a low level or mute, so to prevent further calls that disabled the feature.
In the end they enabled the volume control in a later build ofCR3, along with Telewest. Maybe they got fed up of the support calls asking why the volume control isn’t working on their box. In hindsight they should have followed the Sky design where the STB remote controls the volume on the TV at launch (they ended up doing this later, with the newer remotes)
The options button gives a small menu, allowing for access to the help function and a shortcut to the diary. The audio Language lets to changed the language of the audio, or enabled narrative audio description, Sky would later implement a similar feature in its Sky Guide.
TV Guide
The main TV guide grid. No channels here since the box is not connected to the cable feed.
Here would have been a list of all channel genres, such as Movies, Sports, News, etc
Pressing the i button shows a short description of the program
TV Guide: Diary
The diary is ntl’s version of the personal planner, and is used to store reminders for future events and shows. Future PPV events appear here.
Subject Search
The subject search feature can be thought of as an alternative to the A-Z listings of Sky Guide, showing programs rather than the channels themselves. The idea is that the customer can find a program they like by the genre of the show.
Sadly the TV guide only has 3 days of TV listings, compared to the 7 days offered by Sky Digital.
A list of subgenres
Searching for a specific program via text
The on screen keyboard, not sure if this is the way it’s supposed to look since a lot of the text to the right being cropped off.
ntl customers could also purchase an optional keyboard to make it easier to enter text.
One nice feature is the ability to save personalized genre lists, here you choose the type of programs to like to see and you can easily search for that list without having to manually select categories.
Interactive
Trying to load interactive services which sadly no longer exist. the Liberate middleware was used to deploy the interactive microsites, with the TwoWayTV middleware being used for the interactive applications such as games.
On Demand
Looking for PPV events, this was before true video on demand had launched
Settings
The parental control feature
Changing TV settings, not sure what Enhanced Programming corresponds to?
Favourites
The favorites feature, very similar to Ntl Langely CR3
Help
There’s a help system but with no content stored on the box.
Diag Screen
Diag screen that shows the software an signal information
Using with Virgin Media
Somehow I was able to get the box to bootup on a modern Virgin media connection, with many Channel and TV listings being loaded. Sadly I was not able to get any TV channels to load, not even radio channels which still broadcast in MPEG2
So I’ve been trying to install and use old Linux distros, mainly to look at the possibility to get older Linux games to work, like Simcity 3000 and Unreal Tournament 2004, all of which run into issues when attempting to play on modern Linux operating systems. First thing I tried was to use a virtual machine to run install the OS into.
VirtualBox
Not sure if this is an error or if it’s just because the hard disk just uninitialised
Why would I enable hard drive optimisations when it could cause data corruption?
So far so good, were at the login screen
Oh…
Might be because we don’t have any graphics drivers for the virtual graphics card. At least you would expect a failsafe graphics driver
On VMware
Like on Virtualbox we are able to install as normal, but when it comes to booting the OS,
It seems to have issues detecting the hard disk. Since by default VMWare uses an IDE drive for these old Linux operating systems I though we could try SCSI instead. Unfortunately I was unable to get the installer to detect the SCSI controller.
On PCem
I had better luck using Pcem v17, which actually emulates older PC hardware, rather than using a virtual environment. This has its benefits regarding compatibility but at the expense of performance. Not only must you emulate a slower x86 CPU (In our case an AMD K6 or Pentium, but your host CPU must be able to emulate that older CPU in addition to the video card, chipset and any other peripherals Pcem is emulating. Since Pcem is a single threaded application, having a CPU with a high IPC is beneficial, which is something my AMD FX processor is not well known for. Also depending on the motherboard you emulate in Pcem you may not be able to boot off the CD-ROM directly. Thankfully there was a Linux boot floppy that could be used instead.
The first install went by without a hitch, but when it came to booting the OS it would immediately reboot and would continue to reboot by getting stuck in a boot loop. I fixed this by changing the CPU from a Cyrix to an AMD K6.
The next issue I ran into was with this screen, where it would get stuck at a terminal looking screen with that penguin, where the screen would blink every second. I wasn’t sure what was causing this initially however after changing graphics card in PCem (from a Cirrus Logic 5432? to an ATI Mach, this triggered the Kudzu utility which is used to install system drivers, kind of like the add new hardware wizard in Windows.
Once I selected the correct graphics card, the system rebooted and loaded up the login screen. This helped me understand what was going on previously, either Mandrake did not have the correct driver support for the cirrus logic or PCem is not able to emulate the VGA card properly in Linux. Either way Mandrake was trying to load the X Window system but was failing each time, hence why it was ‘blinking’, the X window system was loading and then crashing.
Unfortunately the speed issues caused a problem with this approach, since PCem would frequently go under 100%, which is the percentage of the speed being emulated by it. Anytime it goes under 100% means the emulator has to slow down in order to catch up. I ended up changing the CPU from an AMD K6 166Mhz to a Pentium 75Mhz, which is below the specification needed for Simcity 3000 and way below what’s needed for Unreal Tournament 2004.
Still at least I was able to boot into a desktop, I guess it’s time for a host CPU upgrade.
Neptune was the supposed successor to Windows 98 and was to be the introduction of the NT kernel for home users.
It’s mostly the same as the Windows 2000 install, makes sense considering both were being developed at the same time, and have a lot in common in terms of visual elements.
When you first login you are presented with this dialog box. You can enter your name or just close it. It does not seem to make a difference.
One issue with this build the the Still Image Service which is faulty in this build and causes a minute hang at startup. This can be disabled without any consequence though the Service management panel (Start, Run, Services.msc)
Once disabled the system will startup and login without any delays or freezing.
Windows Media Player 7, very identical to the Windows ME version
Activity Zones
Windows Explorer has had a slightly new design bringing it closer to the 2000 interface.
Viewing the activity zones in Internet Explorer
Setting the Activity Zones as an Active Desktop background. This may have been the intended use. A lot of the items listed on the activity zone were integrated onto the Windows XP start menu. Shortcuts to the Documents, Music and photos appear here also appears on the XP start menu. E-Mail and Internet shortcuts also appears on the XP start menu where they would show the default respective applications at the top of the stat menu. So one could assume the activity centres made their way somewhat by being embedded in the Start menu.
Customising the desktop activity centre
Alternative background theme
The login screen, the Ctrl+Alt+Del style screen still exists and can be re-enabled.
Unreal Tournament runs somewhat, the mouse aiming is broken partially due to the way Virtual-box captures the mouse, might see if this works better in PCem or 86box instead.
Sadly Neptune did not have a bright future and was scrapped in favour of Windows ME, which was identical to 98 with a few refinements and bringing Windows explorer design inline with 2000. It wouldn’t be until the release of Windows XP (Whistler) when home users would get to take advantage of Windows NT.
Former Telewest/Virgin Media box used for standard definition TV Services.
Starting up…
Sadly the NetID for this box does not match my area, which means channels cannot be watched. Virgin have migrated their streams to MPEG4 anyway which this box cannot decode, however radio channels remain in MPEG2 although they are tied to the NetID which is why they don’t appear here.
The now and next banner that appears when you change channels. If you are used to Sky’s interface you will be familiar to how Virgin’s guide works since it’s mostly the same principles. Left and Right lets you browse the different channels, which unlike Sky will automatically filer out unsubscribed channels, and you can view information for all channels for the next 24 hours
When you remove the smartcard from the set top box
The main home screen, typically the channel you are watching appears in the box to the right. You can’t do that on a regular Sky Digibox. From here you can also access the on demand and catch services, which at the time would have consisted of BBC iPlayer and content from ITV and Channel 4. For a brief period Virgin also offered box-sets in the form of Virgin Central which could be accessed like a regular channel
Channels can be divided into multiple genres. Oddly there’s a high definition section there, despite the box lacking the ability to decode HD channels.
The main TV guide screen
Setting a reminder, similar to adding a programme to the personal planner on Sky
The favorites guide, channels you mark as favorite appear here
The reminders section, similar to the personal planner on Sky Digital
Sorting channels by genre
Settings
Box supports RGB and composite over scart, and has a widescreen option. The EPG does not run in widescreen mode however.
OnDemand and Interactive
Press F to pay Respect… or OK. I guess most of the liberate interactive stuff has been removed
General Use
For years Telewest customers were promised the launch of digital text services that could be activated by the text button. Eventually they just gave up
Help
Pressing the Help button brings up a short guide that mentions most of the common features
Earlier Build
Diag Screens
Kind of like the BIOS of a PC where you can change certain settings like the default frequency. To access it hold down the Up and Down buttons on the front panel of the box whilst it is booting up (whilst -un- appears on the front display). DIAG will then appear on the front
The only thing you can change here is the default frequency parameters. and the RF output.
Inside the box
I’m not sure how similar our 4200DVB is to the American version of the 4200. I guess the CPU chip set might be the same but the software will defiantly be different, since Scientific Atlanta have their own Operating System and middle-ware stack, whereas Virgin use Liberate TV Navigator for their software. Then there’s the DOCSIS modem compared to the DAVIC based one in the American version, and the different encryption systems (Nagravision vs PowerKey)
The internals are similar to the Di4000. One thing I have noticed with Scientific Atlanta boxes is they always mount the PSU on the side. I’m not sure if this allows for better heat dissipation since there are vents underneath the box. The tuner module is huge and takes up a lot of room on the main board.
The CPU (right) with the cable modem coprocessor (left). The CPU seems to be a customized chip for Scientific Atlanta and is designed by ST. This may indicate the CPU core being ST20 based, since many ST chips used that core in various satellite receivers, including Sky Digibox’s. As with modern designs, the main processors integrates the CPU, MPEG2 decoder, CA descrambler and graphics core on the same chip. In terms of memory, the box has 32MB of RAM and 8MB of flash, same as the Pace Di4000T.
The IO is standard for many cable boxes of the era, although this model drops the USB port, and the RF loop through has been removed. The earlier Pace Telewest boxes had an RF loop through that would modulate the STB signal onto a spare RF channel, whilst this box does the same, you cant loop the antenna feed through it, wither a combiner or diplexer device would be needed. Assuming you even wanted to use RF, most customers would use the scart connecter with the RF being used to feed a second TV. I’m not sure if the box feeds the analogue cable channels though the RF out, but since this box was released in 2004 and Telewest were already planning to shut of the analogue feed it’s unlikely.
At least there’s an Optical audio out along with analogue out, which the Di4000 boxes dropped, and the mysterious IR blaster connector.
Front view of the STB, the panel is based on the Scientific Atlanta 4250 design.
Updating System Software
To force a software update, power off the box, hold Power and Ok whilst powering the box on
It’s nice they used Wordart in their software update screens
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