electrorocket
Member
Hey. Just got one of these off of eBay, and cracked it right open to see the guts. There's a few interesting things. First, theres the 2 jumpers.
One is near the clock in, and is a terminator. I guess that's good to have on if you aren't using that input. It looks like it parallels a couple smd resistors with the tip. I guess that gives is a 75 ohm dummy load? Otherwise, are you supposed to use a terminator on the bnc connector?
The second one is more interesting, because I don't really know what it does. It's the PLL range. High or Low. It's defaulted to high. I know a PLL is some kind of clock, but that's about the limit of my knowledge. What does this jumper do?
There's a couple cheap looking capacitors in there too. A 2200uf 16v and 47uf 35v. They're labeled NRSA, and have a big N and a very small c Logo. At first I thought Nichicon, but it doesn't look like one. And they're only 85 degree rated. Would upgrading to an elna, nichicon or vishay yield longer life, or even better performance?
Now I'm gonna put this back together, and fire it up!
One is near the clock in, and is a terminator. I guess that's good to have on if you aren't using that input. It looks like it parallels a couple smd resistors with the tip. I guess that gives is a 75 ohm dummy load? Otherwise, are you supposed to use a terminator on the bnc connector?
The second one is more interesting, because I don't really know what it does. It's the PLL range. High or Low. It's defaulted to high. I know a PLL is some kind of clock, but that's about the limit of my knowledge. What does this jumper do?
There's a couple cheap looking capacitors in there too. A 2200uf 16v and 47uf 35v. They're labeled NRSA, and have a big N and a very small c Logo. At first I thought Nichicon, but it doesn't look like one. And they're only 85 degree rated. Would upgrading to an elna, nichicon or vishay yield longer life, or even better performance?
Now I'm gonna put this back together, and fire it up!