On a PNA, what happens to the RF power during frequency-band crossings?
The MW PNAs have over twenty frequency bands. During band-crossings, the firmware turns off the RF power. Beware that if you are testing a high-gain device with ALC, when the PNA switches bands, the power shuts down and the DUTs ALC attempts to increase the gain. Microseconds later, the PNA power comes back on; however, in this short time frame, the DUT or the PNA can get damaged. The band-crossings are listed below.
