| Electronics > Repair |
| Aeroflex IFR-2398 / calibration / repair help |
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| andy_silicon:
I would suggest RBW fail is a fault rather than calibration issue. If you look through the thread you will see the passwords necessary to get you into calibration menus. Use at your own risk. |
| dbloong:
My machine I changed the battery backup, backup battery without electricity |
| dr equipment:
Hi, I have a same problem in my IFR 2398. The problem is in YTO or in MCL-1 SKY-60? Can you send me a zoom photo of MCL-1 SKY-60 and the circuit around? Thank you :-+ |
| WernerFalken:
Old thread, I know, but just wondering if you got this sorted. I repaired one with level/rbw fails and it was right at the front of the input - one of the AH002R2 switches. Diagnosing that fault wasn't as straight forward as it sounded. A lot of wild goose chases! I went through much of the same frustration with making a riser card/RF adapters to get it functioning so I could probe with another SA.... quite fun. And locating a NEW replacement of that chip was a PITA.... Depending on the rev, there are two different Ax002R2 chips: AH002R2, and AW002R2, and they are not drop-in compatible for these units. On a calibration note: IFR told me that these units are hardware designed to self-cal within 1db across the spectrum. After that, a cal table is used. From what I can tell, the statement was truthful. I used a HP 8664A & HP 437B to check it after intentionally wiping the NVRAM, and the repaired 2398 was pretty darned close for hobby work! Going in and manually calibrating works, but isn't entirely intuitive, so I haven't nailed it down 100% yet. Anyhow, I started a Google Group to gather info about this model, along with the LG SA-7270A, which appears to nearly identical to one revision. https://groups.google.com/forum/#!topic/aeroflex-ifr-2398/3C1R7NfneEk I have a bunch of content there - including some firmware files. |
| BravoV:
--- Quote from: andy_silicon on June 28, 2014, 05:09:34 pm ---Okay - the service manual mentions keying in the password "27329780" to get to the factory setting which allows the calibration tables to be cleared before recalibration. For the life of me I couldn't get this password to work. ( no enter key! ) So after much reverse engineering I now see the bloody obvious. ( once you see that they used a generic routine for entering numbers it was obvious the termination of input was one of the Hz/Mhz/GHz buttons ) It's the "Hz" key to enter the password. Sigh.... At least on the way I discovered another password for the system menu "72237908" Needless to say don't mess with these extra menus unless you wan't to wipe out you calibration. There do appear to be undocumented gpib commands - the work continues. --- End quote --- Aware this is an old thread, just want to say thanks as these both passwords worked at my LIG NEX-1 NS-30, as its originated from Korean LG, before sold to Aeroflex and renamed to IFR-2399 Using that, enabled few 'extra' software features. :-+ Anyone have the abandoned diagnostic/calibration program for this Aeroflex spectrum analyzer series ? Few shots of my NS-30 when unpacking while ago. |
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