HP 3325A, 3325B manual Amplitude Modulation Distortion a. Performance Check

Page 9

TB 9-6625-2049-35

9.Amplitude Modulation Distortion a. Performance Check

(1)Press keys and enter values using DATA keys as listed in (a) through (i) below:

(a)SIGNAL off (option 002 not lit).

(b)FUNCTION sine wave.

(c)ENTRY FREQ.

(d)1 MHz.

(e)ENTRY AMPTD.

(f)3 VOLT.

(g)ENTRY DC OFFSET.

(h)0 VOLT.

(i)Blue then AM ON.

(2)Connect equipment as shown in figure 2.

Figure 2. AM distortion - equipment setup.

(3)Set audio analyzer for a 50Ω (SPCL 75), 10 kHz, 2.5 V output.

(4)Set measuring receiver to measure AM.

(5)Adjust audio analyzer level until measuring receiver indicates 80%.

(6)Set audio analyzer to measure distortion in dB. Audio analyzer indication will be ≤-30 dB.

(7)Press TI blue key then DATA AM OFF key.

b.Adjustments. No adjustments can be made.

10.Square Wave Characteristics

a.Performance Check

(1)Press keys and enter values using DATA keys as listed in (a) through (f) below:

9

Image 9

Contents Models 3325A and 3325B Forms, Records, and Reports Section Identification and DescriptionProgrammed amplitude at 1 kHz Section Equipment Requirements Spectrum Analyzer Equipment Setup Section Calibration ProcessPreliminary Instructions Harmonic Distortion a. Performance Check IN/OUTEntry Amptd 20 dBm Entry DC Offset Volt Entry Freq 20 MHz 50 Hz Entry Amptd Volt Signal on Entry Freq 25 kHz Entry Amptd VoltSquare Wave Characteristics Performance Check Amplitude Modulation Distortion a. Performance CheckEntry Freq MHz Entry Amptd Volt Entry DC Offset Entry Freq MHz Entry Amptd RMS Ramp Retrace Performance CheckEntry Freq 10 kHz Entry Amptd Volt Frequency Accuracy Performance Check Entry Freq 20 MHz Entry Amptd VoltEntry Freq 60 MHz SIG Input AdjustmentsEntry Phase Blue then Asgn Zero PhaseEntry Freq 100 kHz Entry Amptd 13 dBm Sine wave Amplitude and Flatness Performance Check Entry DC Offset VoltEntry Amptd RMS Entry Freq 100 Hz Amptd CAL Press Entry Amptd key Entry DC Offset Entry Freq KHz Entry Amptd RMS Amptd CALSquare Wave Amplitude and Flatness Performance Check Triangle and Ramp Amplitude Performance Check KHz Entry Amptd RMS Amptd CALDc Offset Performance Check 100 Hz Amptd CALDc Offset with Ac Performance Check High Voltage Output Option 002 only Performance Check Power Supply Entry Freq 100 kHz Entry Amptd RMS Amptd CALEntry Freq KHz Entry Amptd RMS Amptd CAL Power supply assembly A2 test instrument top view Final ProcedurePIN