Synthesizer Ref Atten Adjustment

(M9393A)

The goal of this adjustment is to adjust the reference attenuator to deliver the target power level at the 4800MHz Out port. This adjustment changes the reference attenuator while measuring the 4800MHz Out level with a power meter to obtain the target output level on the M9308A synthesizer 4800MHz Out SMP connector. Once the target output level is achieved, the settings are recorded in the calibration file.

Required Test Equipment

Test Equipment	Recommended Models¹
Power meter	N1914A²
Power sensor	E9300A Opt. H25
Cable, SMA (f) to SMP (f)	M9308-20013
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

Setup for Power Meter Calibration

Setup for Synthesizer Adjustment