Frequency Accuracy

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

This test checks the frequency accuracy of the ENA test-port output signal. The frequency accuracy is checked at several frequencies with a frequency counter. Since the ENA employs a PLL frequency synthesizer for the signal source, a Frequency Accuracy Test at certain frequency points can verify the accuracy for the entire frequency range.

Required Test Equipment

Test Equipment
(DSG)1

Recommended Model Number2

E5071C > 8.5 GHz

E5071C ≤ 8.5 GHz
E5072A
E5080A

Frequency counter 1

53230A Option 115

X

X

Frequency counter 2

53151A

X

 

Frequency standard 13

Microsemi 5071A

X

X

BNC Cable

8120-1840

X

X

Adapter, Type-N (m) to BNC (f)

  • 2 required

1250-0780

 

X

Cable, 3.5 mm (m) to 3.5 mm (m)

8121-1834

X

 

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

85027-60005

X

 

Adapter, 3.5 mm (m) to BNC (f)

1250-1200

X

 

Adapter, right angle BNC (m) to BNC (m)4

  • for Option 1E5

1250-1859

X

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.

  3. If the frequency counters have high-stability oven timebase options installed (53230A Option 010, 53132A Option 010 or 012, 53131A/81A Option 010, 53151A/52A Option 001), then it is not necessary to require an external 10 MHz reference. To use the frequency counters high stability timebase, select "Internal Reference" when mapping the frequency standard DSG.

  4. When testing a network analyzer with Option 1E5 (high stability timebase), always connect the 10 MHz Ref Oven port to the 10 MHz Ref IN port on the rear panel using the right angle BNC (m) to BNC (m) adapter.

Connection Setups
  • Due to the complexity of the ENA family of analyzers, only a single representative model will be shown.
  • Some images may not apply to all models.

Frequency Accuracy < 225 MHz

Frequency Accuracy < 225 MHz with External Reference

 

Frequency Accuracy > 225 MHz (Non- 20 GHz Analyzer)

 

Frequency Accuracy > 225 MHz (Non- 20 GHz Analyzer)
with External Reference

 

Frequency Accuracy > 225 MHz (20 GHz Analyzer)

 

Frequency Accuracy > 225 MHz (20 GHz Analyzer) with External Reference