Everytime a new DBC firmware version is installed (PFB or tunable) the calibration parameters should be determined.

1) Apply a tone of 764 MHz at -15dBm to input #1 of all of the DBBC boards using a splitter.

2) Start the DBBC firmware (PFB or DDC) and wait until programming is finished

3) start the DBBC client (e.g. "DBBC client v3.exe")

  > dbbcifa=1,agc,1     (selects input #1 for ifa)
  > dbbcifb=1,agc,1	(selects input #2 for ifb)

  wait a while until the agc has stabilized.
4) start the calibration
	for PFB mode:
		> calibration
	for DDC mode:
		> dbbcgain=all,man
		> calibration=all

  
  a file containing the results is produces in c:\ (e.g. DATE-calib.txt)

  inspect or plot the DATE-calib.txt file and search for the minimum between the two peaks. 
  insert the minimum values into the configuration file e.g. c:\DBBC_CONF\dbbc_config_file_104.txt (file name 
  varies depending on the version). Edit the line just above CAT2 entry.