10. Frequency Response Adjustment

Equipment

Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8340A/B

Measuring Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8902A

Power Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8482A

Power Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 11667A

Adapters

Type N (m) to Type N (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Type N (f) to APC 3.5 (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Type APC 3.5 (f) to APC 3.5 (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cables

1250-1475

1250-1750

5061-5311

BNC,122cm (48in)............................................

HP 10503A

APC 3.5,91cm(36in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

...8120-4921

Procedure

1.Connect the equipment as shown in Figure 2-13. Do not connect the HP 8482A Power Sensor to the HP 11667B Power Splitter.

2.Zero and calibrate the HP 8902A/HP 8482A combination in log mode (power levels read out in dBm) and connect the power sensor through an adapter to the power splitter.

3.Place the WR PROT/WR ENA jumper on the A2 Controller assembly in the WR ENA position.

4.Press [PRESET) on the HP 8560A and set the controls as follows:

C E N T E R F R E Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lO MHz SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OHz RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2dB

5. Press @NSTR PRESET) on the HP 8340A/B and set the controls as follows:

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lO MHz POWERLEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4 dBm

6.On the HP 8560A, press IhnKR) ICAL) MORE 1 OF 2 SERVICE CAL DATA, then FLATNESS. The current value of the RF Gain DAC should be displayed in the active function area.

7.Enter the appropriate Power Sensor Calibration factor into the HP 8902A.

8.Set the HP 8340A/B [cw) output to the frequency indicated in the active function area of the HP 8560A display. Adjust the HP 8340A/B POWER LEVEL for a -10 dBm reading on the HP 8902A.

9.On the HP 8560A, adjust the RF Gain DAC value using the front-panel knob or keypad until the marker reads -10 dBm +/-.10 dB.

10.On the HP 8560A, press II) to proceed to the next frequency.

11.Repeat steps 7 through 10 for all low band frequencies.

12.Press PREV MENU STORE DATA ,then YES on the HP 856OA.

2-46 Adjustment Procedures