[BC] 492x -494x and 300 Hz RBW...

[Mike Holderfield]

Good info Burt. I wondered about using 100 Hz for close in.
Chris Scott seems to have a way around the 80 db problem:

www.scott-inc.com/html/80db.htm

Burt I. Weiner wrote:
> Keep in mind that 73.44 only requires 300 Hz RBW for measurements with 
> 11.5 kHz of the carrier.  Beyond that you can use 1 kHz RBW.  When I was 
> using my 494AP for NRSC measurements I used 100 Hz RBW for the close in 
> measurements, which will accomplish the intent of 73.44.  I made a 
> statement in my reports in the methodology section about using these RBWs.
> 
> One of the things you want to be careful of is that many of the older 
> analyzers did not have the low noise floor necessary to easily allow you 
> to go out to 1 Kilometer and be able to see 80 dB below the carrier 
> (assuming the man made noise would allow it with any instrument!), 
> especially on lower power stations.
> 
> Burt