Re: 2440 nvram (was: NVRAM back-up battery change on a 2715..... avoiding disasters)
So is there a bottom line here? I have ordered replacement NVRAM modules but now am leery of installing them, as I may lose calibration, which seems to be good even though the batteries are down.toggle quoted messageShow quoted text
On Saturday, November 9, 2019, 01:26:28 PM PST, Raymond Domp Frank <email@example.com> wrote:
On Sat, Nov 9, 2019 at 08:39 PM, Szabolcs Szigeti wrote:
True for the operational settings, not true for the Adjustment (chapter 5) data that is stored in the "store..." menus during Adjustment.
Here I disagree.
If this were true, what purpose would the menu-supported adjustments (like setting numbers, turning external pots) and storing by pressing keys etc., see msg #161473, during manual calibration ("Adjustment", chapter 5) serve? They are quite different from the saving of operational settings, which happen all the time during use.
In these respects, the NVRAM function is quite comparable to that in 'scopes like the 2445/65 series. Calibration constants are stored in NVRAM, as are the operational settings. The latter change all the time when working with the 'scope, whereas the former cannot be restored by just pressing a button: The scope needs to be Adjusted as per SM chapter 5. Many 'scopes also store user-initiated attenuator offset corrections in NVRAM.
Not if the constants that were set during Adjustment (chapter 5) were lost because of exchanging the NVRAM , unless the 'scope does have another place to store them. It seems that we don't know where that would be in this model.