Advantest R3465

[tecman]

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

[edpalmer42]

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

[tecman]

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

[edpalmer42]

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