Advantest R3267 R3273 Spectrum Analyzer Service Read more about advantest, spectrum, analyzer and manual.

This series was designed in 1998-1999 by japanese test equipment firm Advantest. The RF input and a couple things were revised for the A revision a few years later. The A revision increases the maximum input power from 20dBm to 30dBm.

Using my Lecroy scope to generate a 2mhz square wave. At this point it passes all test except IF Step Amp when not fully warmed up. After about 40mins of running time self test indicates TOTAL GAIN errors (this is measured through both the RF and IF boards) Rear view in the card cage. From top to bottom: CPU, A/D IF/LOG RF CPU and analog acquisition board.

Main CPU is a Motorola 68306 (basically a 68EC000 with a bunch of extra i/o crap, DRAM controller and no FPU) Can't be assed to figure out how much RAM, not important. Probably 128K or something around there. 1Mbyte NOR flash mfg by Fujitsu (that's the tsop48) Interesting that the CPU is after the Freescale split (2006 date code) and there's micron DRAM from 1998! Had to be fun sourcing parts for this in 2007. Not shown is the floppy drive.

A couple custom ADVANTEST asics (which as far as I can tell are NEC gate arrays). The sony CXD**** chips are IO expanders which are present on the boards probably for bus decoding. IF/log board. According to the maintenance manual (there is no service manual) the IF is 3.58mhz, or the NTSC colorburst frequency. As everything is low frequency here there's no exotic microstrip filters, just through hole varactors and 1206 smds. Bottom left is IF input coax from RF stage. Now all that's left is the RF section proper.

The covered BNC is the optional 10mhz reference oscillator input. The top of the RF mainboard. I don't know jack squat about anything here so feel free to add. Bottom of board. RF block with type N input. If someone says it's OK to open the hood I will (and get pictures) but otherwise cant risk it.

YIG tuned oscillator There are about 13-14 CMOS analog switches scattered around the boards. I will be replacing those and then seeing how the self tests go after that.

This seems to be a common failing point for these units. Anyway if you have anything to add or point out feel free. I recently purchased and repaired a couple of R3132's.

That model suffers from 2nd L.O. Drift with age causing PLL unlock.

I will upload some pictures of the 3132 as its RF circuits are total 'RF Porn'. Having been inside a 3131A before, I was surprised at how different the 3132 is on the inside. A totally different layout and it is all modular for ease of servicing (for Advantest, not me!) These are very nice units when working. A good purchase. I repaired another couple of 3132's for the seller, so got a large discount on my second 3132.

Here are some photos of the 3132 RF module. This is very different to the 3131 and, IMHO, a better design. These pictures are taken from 3 different 3132's and the Microprocessor PCB is from an early model. That unit had a corrupted Firmware Compact Flash card. I had to reconstruct the firmware on a new industrial CF card using the CF from a later unit.it was a PITA job as the 3132 is very fussy about its CF cards and their partitioning.

Note the earlier revision of RF module in picture '102-0550-1' and the later version in '102-0107-1'. The later module has significant improvements in the design. Command Conquer Zero Hour No Cd Patch. I like a manufacturer who continues product development after its original release to make it even better or fix 'niggles'.

The issue was in the 4th section of the IF/LOG board. I replaced the AD606 log opamp (a $40 part) and it was not failing as bad - there was a small amount more gain in the stepamp test stage.

I then replaced the AD826 opamps after that. Then I replaced the two 4072 opamps at the very tail end of the IF board. These drive the signal through the backplane connector onto the ADC / CPU board where it is digitized. Replaced both here and the problem was fixed.

The original is an ON Semi 4072 family, my replacement was MC34072DR2G. After running warm for an hour it still passes with flying colors.