2 1. Slope Compensation Adjustments

Procedure 1. Place instrument on right side as show in Figure 3-80, and remove bottom cover.

2.Connect equipment as shown in Figure 3-80 with power splitter connected to the output of the synthesized sweeper with a cable. Connect one arm of the splitter directly to the SIGNAL INPUT of the HP 8568B Spectrum Analyzer, using a Male-to-Male adapter, and the other arm to the power sensor.

3.Connect the power meter’s recorder output to the HP 8340A/B’s

LEVELING EXT INPUT.

4.Press (INSTR PRESET] on the synthesized sweeper, and set its controls to the following settings:

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100MHz

POWER LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9.0 dBm

RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on

LEVELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INT

5.On the synthesized sweeper, press (POWER LEVEL] and adjust the ENTRY knob as necessary for a power meter indication of -15.00 dBm *2.00 dB at 100 MHz.

6.On the power meter, press [RANGE HOLD] (turning it on).

7.On the synthesized sweeper, press [POWER LEVEL] and adjust the ENTRY knob for a power meter indication of -10.00 dBm kO.03 dB at 100 MHz.

8.On the synthesized sweeper, press cm] LEVELING and adjust the ENTRY knob (REF in dBV with ATN: 0 dB) for a power meter indication of -10.00 dBm f0.03 dB at 100 MHz.

Note Do not vary the synthesized sweeper POWER LEVEL setting (internal leveling) or METER REF and METER ATN settings (external power meter leveling) for the remaining steps in this section of the adjustment procedure. The frequency response adjustments are referenced to the -10.00 dBm power level at 100 MHz.

9. Set the synthesized sweeper to the following settings:

START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10MHz

STOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 MHz

SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40s

SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SINGLE

10.Set HP 8568B LINE switch to ON and press (INSTR PRESET].

11.Key in (START FREQ) 10 MHz, [sTopI 1500 MHz,

(REFERENCE LEVEL) -10 dBm, LOG CENTER dB/Div] 1 dB.

12.On the spectrum analyzer, press TRACE A, (CLEAR WRITE), and (NlAXHOLD).

13.Trigger two full sweeps on the synthesized sweeper.

3-134 Adjustments