I used the MAX232 extra sections to do the conversion to interface with the Motorola TTL. This is the pin-out I used:
It was suggested to add an additional divide by two to the counter stages. Here is how the pins of the two chips are connected after the change.
A program
to collect and display data from the GPS controller board. This is
written in QBasic (ver 4.5) and runs in DOS. This is easily
edited to run with whatever you have.. VGA color is suggested, but can
be edited to run in any screen mode.
It collects the data, plots it on a graph and starts a new screen
after 5 + hours.
The program will display the data while running in a "DOS" Window
(W98 anyway) but won't log from the COM port unless in DOS. Way to go
Bill !
It still has a few bugs... feel free to fix them ! I find it useful
for long long long monitoring of the controller status.
The compiled (read BIGGER) 68,376 bytes is here...416.exe
Again thanks Bill !
This will do all of the above with the addition of plotting DAC and
adding time stamps to the file which
can be exported (imported) into a spreadsheet or whatever you
have. The file is "space delimited" and could be modified easily
to provide "comma delimited" or "tab delimited". It also
converts the 2's complement to voltage and adds a column in the output
file. It's very easy to move it to "EXEL" for more fun.
Some notes while waiting for the oven to stabilize
POWER AND PINOUT FOR HP 10544/10811 OSC
EFC network for 10544/10811 HP oscillators
Brook Shera GPS
Controller
page
The
UT+ DOCs 2057483 bytes