Reply With QuoteI've been clocking at 7.8Mhz for over 8 months now with no ill effects, further more it cured the latency problems I was experiencing with external clients.
3.57Mhz or 6Mhz ?
Just wondering if there are any issues with running an NDS card at 6Mhz either off a DM500 or an external server.
I am sure the card will work at 6Mhz but will it harm it?
Also I assume working at 6Mhz would be an improvement in general for ECM/EMM responses etc.
| Look Here -> |
I've been clocking at 7.8Mhz for over 8 months now with no ill effects, further more it cured the latency problems I was experiencing with external clients.
Agree with Cruiser but depends on the card, Bluey 7.8, Yellow 7.8 and an orangey with a boxkey in give good ecm times as is without overclocking.
DM500s Black with rear on/off switch $99 inc post , DM800 sim 82 $250 inc post, DM800SE $310 inc
K1.Cruiser (07-08-09)
It very much depends on the card. In general overclocking a card will either work fine, not work at all, crash occasionally, or overheat. It's only the overheating that you need to worry about.
If it seems to work OK for a couple of minutes, pull it out, touch the gold contacts on your upper lip and check that it doesn't feel too hot. If it's hot enough to hurt then you're risking card damage. Otherwise put it back in, run it for several hours, then try again: if it's too hot or appears discoloured then it's unwise to continue. Otherwise relax.
Card voltage is also a factor when overclocking but that's another story.
K1.Cruiser (07-08-09)
How high can you go with the voltage?
Leroy
XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS
No probs here either with 7.8. smargo/blue
Thanks for the replies.
I suspected working at 6mhz was good idea.
BTW how are you measuring the speed or is the 7.8Mhz simply the setting that has been made in the config.
get a smargo reader that supports 7.8
run cccam in debug mode - CCcam2.xx -dvn and you will see what your running at.
add 78000 in the CCcam line for the smargo device
uflca
Should be 7800000 there uf
oops my bad i missed a zero
thanks
hmmm I thought maybe a slightly higher voltage may allow for better over clocking like CPU's in PC's. Nobody tried this?Originally Posted by LeroyPatrol
Leroy
XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS
It's certainly true that most microcontrollers including smartcards can run faster if you increase the voltage, but a safer way to interpret that is that microcontrollers' maximum speed reduces when you reduce their supply voltage! You need to be very careful if considering an increase in voltage because many 5V logic devices have an absolute maximum around 5.5-6.0V. Exceeding those specified limits usually causes permanent damage. Devices designed for 3.3V often have an absolute maximum of 3.6V.
There are a few exceptions. It's not uncommon for 3.3V microcontrollers to have 5V tolerance on their input and I/O lines, in order to assist integration with 5V support logic and peripherals. But that doesn't happen by accident, it's the result of deliberate design to allow those higher levels, and they're tolerated only on certain pins.
ISO7816 requires all standard-compliant cards to support 5V initially for the ATR, with hosts subsequently switching down to 3.3V or 1.8V if requested by the card. Evidently though NDS specification isn't ISO7816 compliant: a number of interface ICs (such as ) indicate that NDS requirements are distinct from ISO7816. Over thirty manufacturers produce receivers to NDS licencees around the world apparently and "NDS approval" is all about getting access to those supply contracts. I haven't found a copy of the "NDS specification" so I don't know for certain how NDS requirements differ from ISO7816.
Some here have suggested that NDS is strictly a 3V/3.58MHz system and said that applying 5V to NDS cards is dangerous. I haven't had much experience with NDS (I live in Irdeto 2 territory) so will defer to those who have empirical evidence. But [380K PDF] indicates that NDS requires card hosts to support "4.5, 6.75 & 13.5MHz", and indicates that NDS requirements include "3V or 5V VCC power source to the smartcard". The press release also hints at card current draw of up to 90mA and strict noise management.
It would be possible to modify the DM500 to run the card slot at 3V, I wrote about it a while ago, but it'd be fiddly and it's not something I'd recommend. There's nothing between the smartcard's logic pins and the main system controller so if you make a mistake you may not just fry the card but kill the whole box. If a card really needs 3V you're far safer running it from an official CAM or from an external Phoenix.
Last edited by gw1; 11-08-09 at 06:13 PM.
allover (11-08-09),digidude (17-08-09),LeroyPatrol (11-08-09)
He's Not the Messiah (He's a Very Naughty Boy)
Posting Permissions
Bookmarks