HP 70427A User Manual page 325

Softkeys and Displays
LOW NOISE
LOW NOISE
This softkey puts the local oscillator or source in low-noise mode. In this
mode the amplifiers at the output of the YIG-Tuned-Filter (YTF) are biased
to saturation.
Path
Service Misc Power Control LOW NOISE
HP-IB command None.
Figure 10-62 Reference Chain
10-82 HP 70427A/HP 70428A User's Guide