During all other slots except slot 0, MM3 listens on channel 13,Īfter synchronized, when an OpenMote received a frame from SCuM, it sends back an Acknowledgement (CalAck) on the same channel it was listening before. MM3 can only send beacons on slot 2 on channel 13. During all other slots except slot 0, MM2 listens on channel 12, MM2 can only send beacons on slot 1 on channel 12. During all other slots except slot 0, MM1 listens on channel 11, MM1 can only send beacons on slot 0 on channel 11. The communication rules on each slot are:īefore being synchronized, each OpenMote only listens on channel 11 and wait for CalBeacon sent by MM1.Īfter being synchronized, each OpenMote only sends multiple CalBeacon frames on specific slot at specific channel. Slotframe contains 16 slots and each slot is split into multiple sub-slots for transmitting one frame and receiving an Acknowledgement. The software running on OpenMote is simple time-slotted protocol, no stack running on top. MM2-MM16 are the slave nodes, acting as time slaves MM1 is the master node, acting as time master Each OpenMote is labeled as MM1, MM2, …, MM16 where: The result of this algorithm is two freq_setting tables:įrequency_setting_rx which contains the frequency settings of 16 channels for RXįrequency_setting_tx which contains the frequency settings of 16 channels for TXĬalBox is consist of 16 OpenMotes. We want that to quickly as soon as possible. The goal is to determine SCuM’s frequency setting for each channel, both for RX and TX. Epson shoot-out.A SCuM chip that needs to calibrate, within range of the CalBox I’ll discuss more in the inevitable Panasonic vs. Note that THX and the other similar highest quality modes really look good, if just a touch cool. They measure 800 lumens, a significant increase of more than 20% “out of the box” compared to Mike’s measurements last year for the older HC5010.Ĭomparing “out of the box” brightness of best modes with the Panasonic, the Epson sports just over 800 lumens to the Panasonic’s 650ish lumens. That makes this Epson HC5020 UB more than 20% brighter. We consider this important, as most often, a projector has a brightest mode that just is not pretty to watch. Well, it turns out that Epson has managed to stay ahead of them, by 7-8% That’s not huge but, it does mean you can fill a roughly 5″ larger diagonal screen with the same amount of brightness (compared to the PT-AE8000).Īs always, I ask Mike to also “tweak” the brightest mode, to improve color as much as possible, at the least cost in brightness (we call his “tweaking” a “quick-cal”). More impressive, however, Mike reported that after his calibration, the HC5020 measured 10% brighter than last year.Ī side note for those of you considering this Epson projector or its closest competitor, the Panasonic PT-AE8000: In the recent PT-AE8000 review I commended Panasonic for increasing brightness, and said (anticipating no increase in calibrated brightness for this Epson), that Panasonic, has finally caught up to Epson in terms of calibrated lumens. When measuring the Dynamic mode it proved to be brighter, but by less than 5%. Very interesting! Although according to Epson and their specs, the Home Cinema 5020 UB is the same brightness as the older HC5010, there was a nice surprise.
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