E5080B Method of Implementation (MOI) for USB2.0 Cable-Connector Assembly Compliance Test
Configuration Guides
Configuration Requirements
Description |
Test Equipment |
Qty |
Network analyzer |
Keysight Network Analyzer: (4-port test set with at least 4.5 GHz frequency range) • E5080B-440/460/490/4D0/4H0/4K0 or • P5020/21/22/23/24 (Opt.400 4-Ports) Note: Ensure that VNA firmware revision is at least version A.14.10 or above (Windows 10) |
1 ea. |
Software |
S9x011A/B Enhanced time-domain analysis with TDR * Selection is based on the VNA platforms. x=6 for ENA, x=7 for Streamline USB, x=5 for PXI |
1 ea. |
ECal or mechanical cal kit |
N4433D-010/0DC 4-Ports Electronic Calibration (ECal) Module or 85052D Economy Mechanical Calibration Kit |
1 ea. |
Test fixture |
USB 2.0 official test fixture and calibration standards, or an equivalent set of fixtures and standards. List of calibration standards • Short • Thru • 1/2 Thru • Line 1, Line 2, Line 3
|
1 ea. |
Adapter (for E5080B only) |
Coaxial straight Female-SMA Female-SMA 50-Ohm adapters (Keysight 1250-1666). |
4 ea. |
RF cable |
3.5 mm or SMA cables of 4 GHz bandwidth or more (EG: 5062-6691) * Y1740A-100 (3.5-mm m-m, 36 inch) cable is recommended for USB and PXI VNA |
4 ea. |
Terminator |
50-ohm terminations to terminate unused channels. |
12 ea. |
4. Measurement setups
4.1 Recalling a state file
This section describes how to recall a state file for Time Domain and Frequency Domain settings. A state file can be downloaded from Keysight.com at the following URL. www.keysight.com/find/ena-tdr_compliance
If you use your local PC to download, save the state file to a USB mass storage device in order to move it to the VNA unit. Connect the USB mass storage device into the front USB port of the VNA unit.
4.2 Perform calibration setup
The purpose of this step is to calibrate the RF effects such as delay, loss or mismatch of RF cables and test fixture traces before measurements. In order to remove the fixture trace effect, two calibration methods (ECal calibration & de-embedding or TRL calibration) are available with the VNA firmware for the USB2.0 connectors and cable assemblies compliance tests.
4.2.1. ECal calibration and de-embedding
Full calibration is performed by using the 4-port ECal Module (i.e. N4433A) at the end of RF cables connected to the ENA’s test ports. The effect of the fixture is removed by de-embedding the fixture traces with S-parameter Touchstone files.
Time-domain calibration - ECal calibration and de-embedding for time-domain measurements are performed by the TDR software.