EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: tecman on January 30, 2018, 05:40:37 pm
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I picked up a nice working R3465 8 ghz spectrum analyzer on ebay. It suffered some front panel damage to the frame of the front panel, but otherwise seems fully functional. Passes POST and calibrated w/o errors. There seems to be a lack of any documentation on the web other than the user manual, which is somewhat typical of Advantest. My question is does anyone have any documentation on the R3464/5 analyzers ? Also if someone has dug into one of these, I would be curious about the location and type of battery used for (cal) data storage.
paul
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The battery is on the processor board on the top of the unit. It's in the right, rear corner. In mine, it was a Maxell ER3, 1/2 AA, 3V6, 1.1 AH.
I have a copy of the service manual, but it's totally worthless. No schematic, parts list, or circuit descriptions. Utterly worthless.
Ed
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Did you replace yours ?
On my other equipment having a schematic is very helpful when replacing the battery. I usually connect a spare battery through a diode to the board after the internal diode from the unit's battery. This preserves the data. I will have to try to trace out a bit to see if I can find the isolation diode on the board.
I am not surprised to hear that the "service" manual was a bust. Somebody, somewhere must have some schematics on the Advantest stuff.
paul
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My battery was stone dead so I didn't have to jump through any hoops to replace it. I installed a BR2325 coin cell simply because I've got a bunch. It looks ugly, but it works.
One thing I noticed is that the voltage dropped in the first month from 3V3 to 2V9 and then basically sat there. I don't know if that was due to the battery or the load. My testing showed that at 2V9, the circuit draws ~3 ua. so, at 3V6, you could be looking at a 5 ua drain which sounds nuts to me, but whatever. After 4 yrs, the voltage is 2V870 and the clock is on time.
I don't know if there's supposed to be any high-band calibration data in there or not. If the R3465 has any kind of service menu, I haven't found it. Of course, the lack-of-service manual didn't mention anything. The autocal only works on the low band.
Usually in a situation like this, you replace the battery while the unit is running. Be sure to use an UNgrounded soldering iron.
Ed