A wideband noise amplifier and detector is used to measure sun / moon noise and for tracking via moon noise.The Noise amplifier operates with a bandwidth of 4 MHz and at 141 MHz. FSD is selected as "full", "10", "2", "1", or "0.5"db" It has a "Zero" offset adjustment and gives excellent accuracy when doing CS/GND , sun and moon noise measurements. On the higher uW bands I found it invaluable as a tracking tool to measure moon noise and keep the dish "peaked" on the moon. The Noise Meter uses an AD8307 log detector device and is preceeded by ~ 40dB of gain with helical filtering employed, centred on 141 MHz. (I use a 144MHz IF for all my uW EME transverters.)