Bun's Lab – Telegram
Bun's Lab
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Electronics projects, vintæg computing, programming and repairs. A minimalist blog of sorts.
@BunsGarden @BunsNook
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Well, how sad.
E1406A_Command_Module_Users_Manual.pdf
2.8 MB
283 pages of documentation.

The E1406A is the C sized version of the E1306A. Couldn't find the manual for the E1306A.

No time to read it now, I wanna get somewhere fast
😨1
Bun's Lab
There's life on RS232!
This only gives me Unrecognized command no matter what
Using putty as a terminal emulator I get a TUI, but those function keys do not work, interesting.
Chapter 3, Page 61 in the pdf is about the text user interface the command module provides, and yes, this thing has auto detection of your terminal type. And you can override it.
ST is a command that is recognized, and so is ST VT220. Resizing my konsole window appropriately and doing
% echo $TERM
xterm-256color
% export TERM=vt220
% picocom -b 9600 -d 8 -p n -f n -y n /dev/ttyUSB0

and then running
ST VT220

Gives me a text user interface with working navigation using the function keys.
Now it completely died :(
There's a buzzer on the control module board and not even that does a sound anymore
Letting it cool off a bit, it comes back but barely so.

The PSU makes a squeaking sound on power off now. Yeaaaah... guess it's getting ugly now
Letting it rest a bit stabilizes it. I know it's risky to even try with a sketchy PSU but I have an urge to poke this thing. Will come up with a temporary solution tomorrow.
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The terminal emulation gave me issues. Only function keys F1 through F4 would work in the text interface. So I dug out a real terminal and set it to VT220 mode.
It still doesn't work right
Sneak peek at the next step: trying one of those multimeter modules. Looks like there are even more issues ahead
I want to move onto programming the instruments asap. The PSU issue of the main frame unit can wait. I got this VME back plane I used for tinkering with VME systems before
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VXI stands for VME eXtension for Instrumentation. My command module and instruments only use the P1 connector which is also present in VME. So it should work
Compare this to the VME bus (sans the 64 bit extensions on row z and a)
https://electronics.stackexchange.com/q/450179
VXI modules have a physical switch to set their logical address. This is one of the HP E1326B multimeter modules.