Anritsu S820A manual Example of a Good Connection

9.Using the Menu up-down keys: Highlight PRECISION RL, then press the Select key.

10.At the PRECISION RETURN LOSS menu display, use the Menu up-down keys to highlight FINAL, then press the Select key.

11.Press the Calibration key.

12.At the CALIBRATION menu display, use the Menu up-down keys to highlight START CAL, then press the Select key.

13.At the PRECISION RETURN LOSS CALIBRATION menu display prompt, connect the Offset SWR Autotester to Input A, if you have not done so yet.

14.Connect the precision air line to the Off- set SWR Autotester test port. Position the air line pointing vertically upward. Downward or horizontal positions make connector pin alignment difficult.

NOTE

Ensure that the beadless end of the precision airline is at the measurement connection point.

Press the Select key to start the calibra- tion process.

1: PRECSN RL (A)	10.0 dB/DIV OFFSET +0.0dB	54147A
2: OFF

PRECISION

RETURN LOSS

CALIBRATION

1

CONNECT OPEN

TO AIRLINE

PRESS SELECT

WHEN READY

START: 0.0100 GHz	STOP: 20.0000 GHz
	2 GHz/DIV
401 pts	LEVEL +7.0 dBm

Figure 5. Example of a Good Connection

20.When the calibration is complete, remove the 50 Ohm Termination.

21.Connect the Termination under Test to the beadless end of the air line and press the Select key to begin the measurement.

22.Observe that the waveform displayed re- sembles that shown in Figure 6.

15.Press the Select key when ready.

16.At the PRECISION RETURN LOSS CALIBRATION menu prompt, connect the Open to the beadless end of the air- line. Press the Select key to start the calibration.

17.Verify that the display resembles that shown in Figure 5.

CAUTION

During both calibration and mea- surement, be sure to properly align the beadless connector of the airline. When the connectors are

1:	PRECSN RL (A)	10.0 dB/DIV OFFSET +0.0dB
2:	OFF

1

START: 0.0100 GHz	STOP: 20.0000 GHz
	2 GHz/DIV
401 pts	LEVEL +7.0 dBm

54147A

CURSOR

1:-46.02 dB

10.0050 GHz

PRESS SELECT

FOR

CURSOR MENU

mis-aligned, a spike will usually be visible on the display.

18.At the next menu prompt, remove the Open and connect the Short to the beadless end of the airline. Press the Se- lect key to start the calibration process.

19.At the next menu prompt, remove the Short and connect the 50 Ohm Termina- tion to the beadless end of the air line.

Figure 6. Direct Readout of the Precision Return Loss

23.Press the Cursor On/Off key to On.

24.Observe the CURSOR menu readout for the return loss reading. The minimum return loss reading for the 28K50 termi- nator should be:

￿–34 dB (3.3 - 18.5 GHz)

￿–29 dB (18.5 - 20 GHz).

6 Site Master S820A MM