I agree, WR probe may not be useful especially if you have a LA. With WR option back case have a BNC for trigger output. It is possible to re-wire it for 10MHz input for better CTT time resolution. Even it may not be that useful if you already have a frequency counter.
Yes, I have a Racal Dana 1998 with higher resolution, high stability option and GPSDO.
I would not bother with messing with option 1E (even if it seems easy to do) if it was just for 8 digit precision/resolution. If it were for the scope timebase it would be another story, but it seems apparently impossible.
In that case Dallas -> FRAM change is not applicable, at least it is not a drop in replacement. Your board has an accessible battery, if you are careful and supply a secondary power source you can change the battery without losing contents. You could even decide to put a battery holder for future replacement.
Yes, but having a battery it's really pissing me off, provided all the mess it causes. It reminds me about Icom IC-751A transceiver (and family), it has the MCU program loaded in SRAM(!), if you lose the battery charge, the radio becomes a paperweight.
Anyway I would like to go from SRAM to FRAM.
If this would not be possible eventually I could change the battery.
Having an EPROM burned would allow me to regenerate values in SRAM if something goes bad during the battery surgery operation.
Temporarily substituting the firmware eprom with this one that has a program and my cal data in it to populate again the SRAM.
I have the BOM, once it will be clear to me that/if my 2465B can support a FRAM I will decide how to proceed.
Giuseppe Marullo
IW2JWW - JN45RQ
