EHI head fmod Gravure Japanese_Newspaper_OEM_Engine Lotem_Quantum Magnus_400 Magnus_800 Magnus_VLF Slave_MCE_Firmware Thermoflex Think_Motion_Controller Trendsetter_400/800 Trendsetter_NEWS Trendsetter_Series_4 This parameter affects the performance and stability of the lens positioning servo. It has been set to 0, and should never be changed in the field. This parameter should always be set to 0 except during head alignment in the factory. When fmod and power are both set to 0 (the normal case) the modulation is optimally adjusted internally and the focus laser power set by the "hdm sr" setting. The rest of this description applies only if these values are not set to 0. If fmod is nonzero, it specifies the modulation depth of the light output from the autofocus laser diode. The focus laser beam is amplitude-modulated to improve the noise rejection of the optical distance sensor. The modulation depth depends on the fpower setting. If fpower is changed, fmod has to be changed to maintain the same modulation depth. The units are not calibrated. The output of the optical sensor is proportional to the modulation depth and not to the average output power of the diode. To increase the amplitude of the signal emerging from the optical distance sensor, fmod, not fpower, should be increased. If fmod is too large, the sinusoidal modulation becomes clipped, which may degrade the sensor's performance. This parameter is available.

Please issue the appropriate monitor command to determine this parameter's default value.

Please issue the appropriate monitor command to determine this parameter's minimum and maximum values.

07-May-2002 Normal

../prm/ehi_head_fpower.xmlPRM: head fpower

../prm/ehi_hdm_sr.xmlPRM: hdm sr

..\..\ShowAllErrors.htmFirmware 1 Error Index

..\..\ShowAllCommands.htmFirmware 1 Command Index

..\..\ShowAllParameters.htmFirmware 1 Parameter Index

Updated: Thu Jul 17 07:23:57 2008 PST