Synthesizer Output Power Adjustment

(M9391A)

There are four power adjustments, one for each RF output port (1A/B and 2A/B) on the M9301A Synthesizer. In this process, a separate measurement is made at each RF output using a power meter and, based on the result, a computer algorithm calculates the value to adjust the output step attenuator.

Required Test Equipment

Test Equipment	Recommended Models¹
Power meter	N1914A²
Power sensor	E9304A Opt. H20
Adapter, Type-N (f) to 3.5 mm (m)	1250-1750
Frequency reference module	M9300A
Refer to the main required equipment list for alternative models. N1914A power meters with serial number prior to MY53040007 require Service Note N1914A-07 which fixes a power supply ground loop. The ground loop injects noise into the measurement circuits which can cause unstable measurements at low (-30 dBm) power levels.

Connections and Setup Procedures

For procedures that apply to multiple ports, illustrations will show the setup on only one test port.

Setup for Power Meter Calibration

Setup for Synthesizer Adjustment