BurstElement

Avtechs sales staff and management firmly believed that GPRS wasn't possible on AVC760/761 when I queried this about a year ago... I can't say I've tried it though. Have you tried it?

These are supposed to be connected to constant 12V (battery). If you connect it to your switched ignition line you probably will get a corrupted hdd.

I assume this is what you're after... http://rapidshare.com/files/58088418/AVC76X_IO.pdf.html

AVC760 and AVC761 don't support the GPRS Java AP... you need AVC783, 785 or 787 etc. for that. That said, you can get the Java AP here:- http://211.22.74.18/

The firmware is for AVC760 and AVC761 but its quite an old version now... the current version is here:- http://www.electusdistribution.com.au/products_uploaded/AVC7601_AV083_2020K8.rar All of these DVRs are based on AVC783 which was the first 4CH MPEG4 model from Avtech so it doesn't surprise me that they may have left that part number floating around in the firmware somewhere.

Here you go... http://www.electusdistribution.com.au/products_uploaded/AVC760_761_1098K2.zip

Usually you'll find manufacturers use 1/4" sensors in speed domes so that they can reduce the overall length of the lens... bigger sensor = longer zoom lens.

You'll probably find a decent aspherical IR cut lens will take away most of that reflection.

Yep RS232 PTZ connections typically have four wires (TX+, TX-, RX+, RX-) RS485 connections just have two wires + / - or A / B On camera's which can do both RS232 and RS485 you typically connect RS485+ to TX+ and RX+ and RS485- to TX- and RX-

Pure infrared light is invisible, however, most CCD sensors sensitivity drops off dramatically anywhere past near-IR (NIR) light levels (~850nm) which is why most CCD IR illuminators give off a faint red glow. Many manufacturers have tried to market camera's and illuminators that use invisible IR light (~940nm) but because of the sensitivity of the sensor they have to use hugely powerful illuminators (e.g. clusters of 5W luxeon style led's) just to get the same sort of results as you would get from a small bank of 5mm NIR led's. Because of this most of these "invisible" IR camera manufacturers disappear off the market quite quickly.

I'd suggest your problem is the D-link modem... we refuse to use them because they lock up too easily (NAT overflow) and have buggy interfaces e.g. some firmware versions don't "save to flash" when settings are edited via firefox... only Internet Explorer works.

I wouldn't blame the connector if you are using underspec cable... find another cable supplier. My preference on connectors is: 1. Compression 2. Crimp 3. Solder 4. Twist on I always use compression connectors for outdoor work and crimps for indoor work... never had a problem with connections on any of my installs thus far. (crosses fingers)

Premade cables are only for end users DIY installers... the only premade cables we use are for DVR to monitor connections etc. Camera installs should always be done with siamese RG59 & 18g and I must say you boys are all getting ripped off on your cable... I could run RG6 + T&E mains cable for that sort of pricing!

1. Check the voltage at the camera, if you are using a DC power supply over a long run you might have too much voltage drop over the cable. 2. If you are transmitting over CAT5 double check that you have the video signal and signal ground running on a pair and not two seperate strands. 3. Be careful not to run the cables too close to the DVR's power supply... switching mode power supplies can make for some nasty video interference.

You need the video server E program that was supplied with the unit. If you don't have it anymore you can download it again via the link "Download AP" that appears on the login page of the web interface. Once you have the Video Server E program you can use it to convert the vse file over to a more usable avi format.

You're pretty much on the money there Thomas... CIF is pretty much the CCIR broadcast standard for analogue video and D1 is the broadcast standard for digital video. To me 100IPS @ CIF for an 8ch is half the speed I would expect to see, however, we are seeing more and more consumer / prosumer / povstaller hardware these days and it's sort of coming down to a question of what do you need vs what is good / bad. Basically I would put it down to price... if you (yourself) are happy with the price as defined by your region (I expect that would go for ~250-300US but your market will differ) then go for it. Also although I've never seen that unit / brand before it smells like an Avtech product... either OEM or copy and running at half the speed. The reason I say that is simply because of the layout of their spec sheets and the "pentaplex" BS which if anyone has read the box and considered what they are claiming would realise it's just marketing BS.

Hi Steve, I assume you're talking about this Seagate HDD (I don't think there is another 750GB EIDE that is commonly available): Specifications 750 GB Model Number ST3750640A-RK Interface Ultra ATA/100 PHYSICAL Cache 16 MBytes Capacity 750 GB PERFORMANCE Spindle Speed 7200 rpm Unfortunately Seagate don't list current draw @ 5/12V on their website as those figures would be my only concern with using this HDD in the AVC760. I highly doubt Avtech will have tested AVC760 with a 750GB hdd in particular, and if they did then it would appear in the table at the back of the manual, however, in "theory" it should work. Reason: AVC760 supports LBA48 and is based on the same basic hardware and the same basic firmware that AVC787 / AVC787D use and I know for a fact that the Seagate 750GB's work on AVC787D because we loaded one up for a customer along with a fully loaded (3x750) hdd array (total 3TB). As I said my only concern would be the power supply but with Avtechs most recent PSU's (i.e. all of their MPG4 DVRs) all that happens when you overload a rail is the unit shuts down. Also do you realise that if you do put the Seagate 750GB into AVC760 that you will probably be the first person in the world that has done so... AVC760 is the entry level / economy DVR and unless UK prices are much different to AU prices you should be paying more for the HDD than the DVR