LO Output Power Option EXM Adjustment

This adjustment applies to the following models:

N9038A MXE with Option EXM
N9038B MXE with Option EXM
N9048B PXE with Option EXM

This adjustment adjusts the External LO Output amplitude to +16.5 dBm. In this adjustment, a power sensor is connected to the EXT MIX port. The DUT is placed in External Mixing mode and the center frequency is stepped in 75 MHz increments. At each center frequency, an internal DAC is adjusted until the power meter reads +16.5 dBm, and the DAC value is saved. The center frequency is then tuned to the next frequency and the process is repeated.

Required Test Equipment

Test Equipment	Model Number¹
Power Meter	N1914A
Power Sensor	N8485A
Adapter, 3.5 mm (f) to Type-N (m) 8485A adapter	08485-60005
Adapter, 3.5 mm (m) to 3.5 mm (f)	83059C

Refer to the main Required Equipment table for a list of alternative models.

Connection Setups

Power Meter Calibration

LO Output Power Adjustment Setup

Occasionally, due to manufacturing tolerances, the front panel may prevent the power sensor from fully seating on the External LO Connector. If this situation occurs, a 3.5 mm (m) to 3.5 mm (f) adapter (such as the 83059C) should be used to position the power sensor further from the front panel.