Tsebi Projects Forum

This thread is for DragonLink connection instructions and such.

Daniel

All the modules are now with John and we are slowly assembling and testing each and every single module to ensure that we get the expected level of performance out of these things. Currently we have 4 or 5 transmitter modules assembled and tested. Unit ID's are also now being assigned.

Daniel

There seems to be another sensor that we missed, the MPXV7002DP from Freescale. This actually reports a range of -2kPa to 2kPa but with the differential ports, could be the perfect thing for TAS sensing. Outputs analog so should be easy to use.

Daniel

Okay, today I got down to figuring out why the received picture was not stable. As it turns out - we should not have put the output AC-coupling capacitor before the video amplifier because this caused the signal to be zero biased and only the positive side of the waveform was getting amplified. This...

The IF frequency appears to be 480MHz. Typical video bandwidth is around 15MHz in total. The SAW filter used, however, has a bandwidth of 21MHz so in theory we could improve the S/N ratio by using a narrower filter. We can also try using a filter with a lower insertion-loss. It is unclear at this po...

The breakdown of the key active component parts are as follows:- HS153SN-J - 8-bit MCU from EMC or Elan SL1461SAB - Video IF IC from Zarlink E07SL - PLL IC from Fujitsu U2860B - FM stereo demodulator F480-1 - 480MHz SAW filter BW:21MHz(-1.5dB), IL:18dB P5 - BFG425W NPN RF transistor Daniel

The 2.4GHz video receivers Mark uses employs the GP-622RA receiver modules. This has been shown to have quite good sensitivity thus far and we want to see if there is any way by which we can improve this performance further. Daniel

My half of the TX boards all done:- Daniel

20 Receivers assembled, fused and programmed. They just need to be calibrated and tested, then have heatshrinking applied. Daniel

Got news that the second board is in the mail and should arrive in about a week - or maybe this Friday (but I'm not around by then).

Daniel