Windows software for LPT-1250 Spectrum Analyzer - Page 1
Forum section: electronics / testgear

author: Ancato
author_rank: Newbie
timestamp: June 06, 2025, 03:01:41 pm
content: I have an LPT-1250 spectrum analyzer from LP Technologies, and I would really like to find the Windows software "SDL.EXE" for it. The software is used to remotely control the device from a PC.Does anyone have this software or know where it can be found online?Excerpt from the manual about SDL.EXE:With the remote operation program, SDL.EXE, the LPT-1250 is capable of communicating with a computer over the RS-232 port, providing display of the spectrum trace, saving the trace and printing of the trace, plus allows you to control the settings of the LPT-1250 from the computer.The PC application is designed to run on Windows NT, Windows 95, or Windows 98. The serial port used is selectable and the port setups are handled automatically by the application. The cable should be a straight through RS-232 cable (not a NULL modem).

author: coromonadalix
author_rank: Super Contributor
timestamp: June 06, 2025, 03:26:02 pm
content: from them ?https://www.lptech.com/lsmhave you asked them ?

author: Ancato
author_rank: Newbie
timestamp: June 06, 2025, 05:52:26 pm
content: Yes, I have asked the supplierwww.lptech.combut no reply so far.

author: Ancato
author_rank: Newbie
timestamp: June 27, 2025, 07:48:13 am
content: For the records if others are interested.I found the software sdl_v2_16.exe and is seems to work ok on Windows 11.The bad news is that the software is copy protected, you need a 16 digit key to unlock the software.Every LPT-1250 unit has its own key based on its serial number.I got another units serial number and corresponding key but it does not work with my unit.The supplierwww.lptech.comrefuses to give any kind of support on their old equipment.

author: m k
author_rank: Super Contributor
timestamp: June 27, 2025, 08:30:24 am
content: How is that key tested, by asking a serial number?Make a sniffer.When serial number comes out your sniffer replaces it.

author: Ancato
author_rank: Newbie
timestamp: June 27, 2025, 08:56:31 am
content: Yes, a sniffer that replaces the serial number could be a way forward.I might try it later.

author: coromonadalix
author_rank: Super Contributor
timestamp: June 27, 2025, 03:39:42 pm
content: can you share it on an free hosting site for one week ? and send me the link thks@acanto, is there any memory in it, like eeprom, I2c, serial devices etc.... maybeyou could be able to make a dump of it and try on another LPT-1250for sure the serial is stored somewhere ?

author: Bicurico
author_rank: Super Contributor
timestamp: June 27, 2025, 10:21:47 pm
content: Share a link to the software.

author: Ancato
author_rank: Newbie
timestamp: June 29, 2025, 08:36:12 pm
content: Here is a link to the LPT-1250 software sdl_v2_16.exe:https://www.dropbox.com/scl/fi/3pfi19dcghcrhdv2xuzmj/sdl_v2_16.exe?rlkey=sqjhzt2x1ec0696yh04cczgfu&st=e8lbjmey&dl=0

author: nanospace
author_rank: Newbie
timestamp: August 05, 2025, 08:35:38 am
content: Hi!I enclosed my sw for LPT-1250.1. Make a directory to save then content of the zip-file.2. Config.txt will hold the COM-port number selected.3. License.sec holds the key.4. Regdata.txt. I saved here my key and my unit's serial no.Try it, and try to discover the encryption method. That is all what I can help you!By the way! I'm search some information about the calibration, as my unit forget it. Can you help?Best Regards,Endre Melis (Hungary)

author: m k
author_rank: Super Contributor
timestamp: August 05, 2025, 03:17:19 pm
content: So scrambled with serial and installation adds a correct cipher?

author: nanospace
author_rank: Newbie
timestamp: August 06, 2025, 10:40:57 am
content: I don't remember how was it installed.... it was year 2002 :-)I will check the documentation (with the registration data), but only at end of august, as I'm not at home.Please send me a mail to remember me later. (nanospace@t-online.hu)