Trace Noise

This topic page applies to all supported ENA models in both the Factory Recommended and the Normal Variant test plans.

This test checks the trace noise level for each test port of the ENA. The trace noise levels for S12, S21, S34, S43 are quantified by performing a "through" measurement 32 times over the full frequency range of the analyzer with a cable connected between two ports. The E5080A ENA requires a special semi-rigid cable for the through measurement that will improve the stability of the test result. Refer to the equipment list below.

The trace noise level for S11, S22, S33 and S44 are quantified by performing a "short" measurement 32 times over the full frequency range of the analyzer with a cable (terminated with "short" device) connected to each port (1,2,3, and 4).

Standard deviation of the measured values at each frequency is calculated and then translated into a noise level expressed in magnitude (dB rms) and phase (deg rms).

Required Test Equipment

Test Equipment
(DSG)1

Recommended Model Number2

E5071C > 8.5 GHz

E5071C ≤ 8.5 GHz
E5072A

E5080A

Cable, Type-N (m) to Type-N (m)
(Cable N:M-N:M 1)

8120-8862

 

X

X

Cable, test-port through cable assembly, 81.2 mm

  • E5080A 4-port models only

E5080-65151

 

  

X

Cable, test-port through cable assembly, 203 mm

  • E5080A 4-port models only

E5080-65152

 

  

X

Cable, test-port through cable assembly, 284.2 mm

  • E5080A

E5080-65153

 

  

X

Cable, 3.5 mm (m) to 3.5 mm (m)
(Cable 3.5mm:M-3.5mm:M 1)

8121-1834

X

 

 

Short termination, Type-N (f)
(N/A)

85032-60009

 

X

 

Short, 3.5 mm (f)
(N/A)

85052-60007

X

 

 

Open termination, 3.5 mm (m)
(N/A)

85032-60007

  

 

X

Adapter, 3.5 mm (f) to 3.5 mm (f)
(Adapter 3.5mm:F-3.5mm:F 1)

  • 2 required

85027-60005

X

 

 
  1. The DSG (Device Substitution Group) is listed below the equipment description, if applicable. These devices are required to be mapped in TME to execute a test. DSGs require either GPIB communication or are important for dynamic measurement uncertainty calculations. N/A refers to required equipment that is not mapped as DSGs in TME.
  2. Refer to the main Required Test Equipment for a list of alternative models.

Connection Setups
  • Due to the complexity of the ENA family of analyzers, only a single representative model will be shown.
  • For procedures that are repeated on multiple ports, illustrations will show the setup on only one test port.

Port 1 to Port 2 through measurement

 

Port 3 to Port 4

 

Short Termination with Cable (not for E5080A)

 

Open Termination (no cable) — E5080A only