At 5/11/2010 21:07, you wrote: >For those who wonder how the TFD61x2 filter can impair the transmit signal >at 2m, look at the attached plots. The TFD6102 filter is electrically >identical to the TFD6112, and the TFD6101 filter is electrically identical >to the TFD6111. Although there will be some variation between individual >filters, it is quite obvious that a commercial-band filter severely >attenuates a signal at 2m.
So was this filter Motorola's way of dealing with the undesired harmonic & subharmonic products from the exciter? Wondering why they felt they needed a BPF, not just a LPF. Bob NO6B
