On Sep 28, 2006, at 3:59 AM, Geoffrey Mackenzie-Kennedy wrote:
Evening Kevin,
A step attenuator capable of adding up to 140db or so of loss is
certainly very useful when working with receivers, but would be quite
expensive I believe.
This is exactly why we designed the XG1 and XG2 receiver test
oscillators. Both give you a 1 microvolt +/- 1 dB signal for use in
receiver sensitivity testing. 1 microvolt is -107 dBm, and the AT1 step
attenuator could reduce the signal to around -148 dBm. Now *that's* a
weak signal :)
73,
Wayne
N6KR
---
http://www.elecraft.com
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