Agilent Technologies 856290216 service manual Ext Mxr Ref Cal

15. External Mixer Amplitude Adjustment (Non-Option 327)

Table 2-12. Conversion Loss Data

Frequency (GHz)

Conversion Loss (dB) (230 dB)

18

20

22

24

26

27

8.Connect the HP 8481D to the HP 11708A attenuator already connected to the HP 8902A RF power connector. Zero and calibrate the HP 8902A/HP 8481D combination in log mode. Enter the power sensor 50 MHz cal factor into the HP 8902A. Connect the power sensor, through an adapter, to the SMA cable.

9.Adjust the HP 8340A/B (POWER LEVEL) until the power displayed on the HP 8902A reads -30 dBm f0.05 dB.

10.On the spectrum analyzer,press [CAL), MORE I OF 2, SERVICE CAL DATA, 3FtD IF AMP, then CAL 3RD AMP GAIN.

11.Wait until the message ADJUSTMENT DONE appears in the active function block and press

EXT MXR REF CAL .

12.Disconnect the SMA cable from the power-sensor/adapter and connect the cable to the spectrum analyzer IF INPUT.

13.Use the spectrum analyzer front-panel knob, step keys, or keypad to change the amplitude of the displayed signal until the marker reads 0 dBm f0.17 dB.

14.Press PREV MEHJ , STORE DATA, and y%S on the spectrum analyzer.

15.Place the WR PROT/ WR ENA jumper on the A2 controller assembly in the WR PROT position.

Note	The following steps should only be performed if you need to replace the 30 dB
	conversion loss values to those recorded in Table 2-12.

16.Press (mCTRL), EXTERNAL MIXER, AMPTD CORRECT, then CNV LOSS VS FREQ on the spectrum analyzer.

17.Press a or a to select frequencies where the conversion loss value was recorded in Table 2- 12.

18.Use the spectrum analyzer front panel keys to enter the conversion loss values recorded for the frequency.

Adjustment Procedures 2-59