Anritsu 373XXA Harmonics & Harmonic Related, Standard Time Base, High Stability Time Base Option

APPENDIX D PERFORMANCE SPECIFICATIONS

LEVEL CONTROL RANGE

(Without step attenuator)

	37317A	37325A	37347A	37369A	37397A
Above Reset	+10 dB	+10 dB	+10 dB	+20 dB	+20 dB
Power*
Below Reset	￿25 dB	￿25 dB	￿25 dB	-20 dB	-20 dB <47 GHz
Power					-12 dB ￿47 GHz

*Source power above the reset level is allowed but not guaranteed, especially over the full frequency range.

POWER FLATNESS

Frequency Range (GHz)	Flatness (dB)
0.0225 to 13.5	￿1.5
13.5 to 20	￿2.0
20 to 40	￿3.0
40 to 65	￿5.0

SOURCE PURITY

(Specifications apply for all models at maximum rated power.)

Harmonics & Harmonic Related:

15 dBc (37325A, 37347A, 37369A, 37397A)

35 dBc (37317A)

Nonharmonics: 35 dBc (standard)

Phase Noise: >60 dBc/Hz at 10 kHz offset and 20 GHz center frequency

SOURCE FREQUENCY ACCURACY

Standard Time Base:

Aging: <1 x 10-6/year

Stability: <1 x 10-6over +15oC to +50oC range

High Stability Time Base (Option 10):

Aging: <1 x 10-9/day

Stability: <5 x 10-9over 0oC to +55oC range

GROUP DELAY CHARACTERISTICS

Group Delay is measured by computing the phase change in degrees across a frequency step by applying the for- mula:

τ g	= −	1/	1	d Φ
			360	d f

Aperture: Defined as the frequency span over which the phase change is computed at a given frequency point. The aperture can be changed without recalibration. The mini- mum aperture is the frequency range divided by the num- ber of points in calibration and can be increased to 20% of the frequency range without recalibration. The frequency width of the aperture and the percent of the frequency range are displayed automatically.

Range: The maximum delay range is limited to measur- ing no more than +180￿ of phase change within the aper-

ture set by the number of frequency points. A frequency step size of 100 kHz corresponds to 10 ms. Measurement Repeatability (sweep to sweep): For continuous measurement of a through connection, RSS fluctuations due to phase and FM noise are:

141. [ ( Phase Noise in deg )2 + ( τ	g	⋅	Residual FM Noise in Hz )2 ] 0. 5
360 ( Aperture			in Hz )

Accuracy:

Error in τ g =	\ Error in Phase (deg )	+ [τ	g ⋅ Aperture Freq. Error (Hz ) ]
	360

Aperture (Hz )

VECTOR ERROR CORRECTION

There are five methods of calibration:

1)Open-Short-Load (OSL). This calibration method uses short circuits, open circuits, and terminations (fixed or sliding)

2)Offset-Short (waveguide): This calibration method uses short circuits and terminations.

3)LRL/LRM: T h e L i n e - R e f l e c t - L i n e ( L R L ) o r Line-Reflect-Match (LRM) calibration uses transmission lines and a reflective device or termination (LRM).

4)TRM: The Thru-Reflect-Match calibration uses short circuits and fixed termination.

5)AutoCal: The VNA will serially drive an external AutoCal module to perform a 2-port OSLT calibration. AutoCal is a single two port calibration module with built-in, switched, and characterized OSLT standards. AutoCal provides quick, reliable, and accurate calibra- tions that exceed the performance of a standard broad- band load OSLT calibration.

There are four vector error correction models available:

1)Full 12-Term

2)One Path/Two Port

3)Frequency Response (Transmission/Reflection)

4)Reflection Only

Full 12-term can always be used, if desired, since all 373XXA-series models automatically reverse the test sig- nal. Front-panel display indicates the type of calibration stored in memory. Front-panel button selects whether cali- bration is to be applied, and an LED lights when error cor- rection is being applied.

Calibration Sequence: Prompts the user to connect the appropriate calibration standard to Port 1 and/or Port 2. Calibration standards may be measured simultaneously or one at a time.

Calibration Standards: For coaxial calibrations the user selects SMA, GPC-3.5, GPC-7, Type N, 2.4 mm, TNC, K, or V Connector from a calibration menu. Use of fixed or sliding loads can be selected for each connector type. User defined calibration standards allow for entry of open

373XXA MM D-7