RF Eclectica Wiki

Try to learn something about everything, and everything about something - Thomas Huxley

User Tools

Site Tools


public:calculator:info:dm42_info

Calculator Information

DM42 Info

Purchase Information

  • Date : December 2020
  • From : Swiss Micros (via Amazon)
  • Price : £179
  • Serial : 06434

Firmware

DateSerial No.DM42 VersionFree42 VersionDMCP VersionFirmware Files
24/5/22 06434 3.21 3.0.9 3.22 dmcp_flash_3.23_dm42-3.21.zip
15/4/23 06434 3.22 3.0.153.24dm42_3.24.zip

RTC Correction

  • approx. error +3.4s/d = +39.3pm
  • Correction factor C from C = 2^20 P /(10^6 + P)
  • Approximations :
    • C = 1.04858 P
    • P = 0.953674 C
  • Calculated C = -41.26

Put a text file /rtccalib.cfg in root directory of FAT drive with contents:

-41.26

RTC Error

StartStopAccumulated Error (s)Rate Error (s/d)Comments
28/3/22 7/11/22 -5.80.0 -5.8s over period 224 days = -0.03s/d
15/04/23 22/11/23 -6.3 0.0

Swiss Micros Info

DM42 Program Listings

public/calculator/info/dm42_info.txt · Last modified: 22/11/23 13:36 GMT by john