Freq Resp above 3.6 GHz, Preamp Off Adjustment

This adjustment applies to the following models:

At each correction frequency the DUT's conversion loss is measured. The loss is normalized to the loss at 4800 MHz and this number is placed in the DUT memory. The DUT uses these stored corrections to make accurate amplitude measurements.

In order to measure the conversion loss accurately, a known power must be applied to the DUT. The PNA-X network analyzer is used as the calibrated source. A calibration must be performed on the PNA-X prior to running the adjustment (see below).

The related performance test for this adjustment is Freq Resp Above 3.6 GHz Preamp Off Performance Test.

Required Test Equipment

Test Equipment

Model Number1

Network Analyzer 1

N5247B Option 425

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

8121-2065 (or equivalent)

Cable, BNC

8120-1840

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

  • For Options < 544

  • Calibration plane adapter

11901B

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

  • For Option 544

  • Calibration plane adapter

11900B (or equivalent)

Adapter, Type-N (m) to 3.5 mm (m)

  • For Options < 544

Maury CC-A-35N-MM

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

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, refer to Network Analyzer Freq Sweep Calibration.

Connection Setups

Due to the sensitivity of this adjustment, minimize cable movement from the network analyzer and avoid bending the cable unnecessarily.

Adjustment Setup (RF Input 1)