[RFI] Re: Final Re about smell tests

[Tim Groat]

Eddie,

I'm curious if you measured the "noise pulses" with a quasi-peak receiver 
or spectrum analyzer. That is what the FCC specifies for Part 15 devices at 
HF. The QP detector has a fast-attack, slow-decay response (1ms and 1 sec 
time constants, respectively, if I recall correctly). It's intended to 
represent the perceived severity of low duty cycle interference sources.

I have seen more than 30dB difference between the QP detector and average 
signal levels. That often happens when a rectifier produces short, 
high-amplitude transients at every AC line half-cycle.

73,
--Tim (KR0U)

At 12:00 PM 10/25/04 -0400, you wrote:
 >There were noise pulses there that were about 40-60db above the noise
 >floor, but they were very thin across the band so they didn't cause
 >much interference.