Downconverter IF Attenuator Adjustment

(M9393A)

The goal of this adjustment is to determine the relative errors of the IF and ADC attenuators in the IF path of the downconverter module in the three different IF (40A, 40B, 160 MHz) filter paths. This data is used to determine the error from ideal attenuator setting.

Network Analyzer Calibration Procedure

The network analyzer used in this adjustment must be calibrated prior to running the adjustment. The calibration will need to be repeated once every three days or if the connectors or cables have been disturbed. If it's been within the three day time frame and the connectors and cables have not been disturbed, then the network analyzer calibration is not necessary and you may proceed with the adjustment.

For a list of required equipment and calibration instructions to perform the network analyzer calibration, go to the Network Analyzer Calibration Procedure topic page.

Required Test Equipment

Test Equipment

Recommended Models1

Network analyzer

N5245A2 Options 400, 423, 080, and 088

Frequency reference module

M9300A

Cable, 2.4 mm (f) to 2.4 mm (m)

8121-2065 (or equivalent)

Adapter, 2.4 mm (f) to 2.4 mm (f)

11900B (or equivalent)

Adapter, 2.4 mm (m) to 3.5 mm (m)

11901A (or equivalent)
  1. Refer to the main required equipment list for alternative models.

  2. Minimum firmware version A.10.43.00 required.

Connections and Setup Procedures