5. DC Log Amplifier Adjustments

Procedure

1.Set the HP 8560A m switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location.

2.Connect the HP 3335 50 0 output to the HP 8560A 50 0 input. Set the HP 8560A (LINE) switch on.

3.Set the HP 8560A controls as follows

C E N T E R F R E Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..O REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1OdBm dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..ldB/DIV RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz IF Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off

4. Set up an HP 3335A as follows:

FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -18dBm

5.Press ICAL), ADJ CURR IF STATE , wait for the analyzer to complete adjustments then press m.

6.Adjust A4R445 for maximum on-screen amplitude. Refer to Figure 2-7 for the location of A4R445.

A4 Linear Fidelity Adjustment

This adjustment consists of adjusting A4R544 until the delta marker reads -40 dB under the following conditions.

Procedure

1.Set the HP 8560A (LINE) switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location.

2.Connect the HP 3335 50 R output to the HP 8560A 50 R input. Set the HP 8560A m switch on.

3.Press(PRESET)(AMPLITUDE), LINEAR, MORE 1 of 3, AMPD UNITS,dBm,(CAL),

IF ADJ OFF.

4. Set the HP 8560A controls as follows:

C E N T E R F R E Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz

SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5 MHz

RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1OdBm

5. Set up an HP 3335A as follows:

FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -18dBm

6. Press [PEAK SEARCH), MARKER DELTA .

2-30 Adjustment Procedures