Pharoah Editorial, Inc

Version 2.2 requires a modification to SynFlash circuitboard. Instructions may be downloaded.

• Flash/pips with duration of 1 frame are now standard for all interlaced and progressive formats. (Prior to this version, some formats produced flash/pips of 2 frame duration.)
  
  
• New modes have been added for frame rates above 30, giving a choice of either 1 or 2 frame duration flash/pips. For rates of 30 and below, operation is similar to earlier versions. For rates above 30, the Mode switch cycles through 10 choices. The first 5 choices provide flash/pip duration of 1 frame, the remaining 5 choices provide flash/pip duration of 2 frames with slower repetition speeds, and give the appearance that SynFlash is operating with video frame rates ˝ as fast as they actually are.
  
  
• “One per second” mode now operates as expected at all supported frame rates and flash/pip durations. (The "25p compromise" has been eliminated.)
  
  
• The Field select switch has been relabeled. F1 = ”Lower”, F2 = “Upper”. This is only a label change, the switch operation is unchanged.

• Synflash now starts in 1 flashpip per second mode, when a valid reference with standard frame rate is detected at turn on. 1080p/25 users see the last note. (Previously, SynFlash started in either 8 frames per flash/pip or 10 frames per flashpip mode, depending on detected frame rate.)
  
  
• "Video pull down” frame rates (23.976, 29.97, 59.94) are detected.
  
  
• When flashpip mode of 8, 10, or 12 frames per flash is selected, SynFlash regularly pauses the flashpip repetitions. This update changes the length of the pause. Now, after 12 flashpips a pause equal to 4 additional flashpips occurs. (Previously, after 14 flashpips a pause equal to 2 flashpips occurred.)
  
  
• Reference signal error detection and re-lock, especially after a change of video frame rate and/or format, has been improved.
  
  
• The placement of individual flashpip on/off points (relative to the reference signal) has been adjusted to more closely match standard active video area. (Previously, a flashpip event could start up to 4 video lines ahead of active video and extended up to 2 lines beyond active video.
  
  
• Battery drain has been reduced by approximately 20 percent during operation. Drain during sleep mode is reduced approximately 50 percent.
  
  These two changes apply ONLY to v2.0:
• Fixed bug with 1080p operation, to correctly make 1 per second flashpip spacing. NOTE: progressive formats produce flashpips with duration of 2 frames, not 1 frame. Regardless of flashpip duration, the spacing between flashpips is now correct except for 1080p/25.
  
  
• IMPORTANT "25p Compromise": For 1080p/25p only, flashpip spacing has been changed. The actual spacing between flashpips is always either 24 (25-1) or 26 (25+1) frames, and thus they are not spaced at exact 1 second intervals. The longterm average spacing, though, is 1 per second.
  Explanation: Since progressive flashpip events are always 2 frames in duration, as noted above, a true “1 per second” flashpip sequence from SynFlash is not possible at any odd numbered frame rate. Therefore, when a 1 per second rate is selected with 1080p/25 reference, SynFlash must place flashpip events on even frame numbers. Each flashpip alternates between 24 and 26 frame spacing. This compromise can be eliminated with a hardware modification and installation of v2.2 (or higher) firmware. Modification instructions are available on the download page.