HP 3325A - Manual (Page 7)

TB 9-6625-2049-35
7
8. Harmonic Distortion
a. Performance Check
(1) Connect TI EXT REF IN 1, 10 MHz to spectrum analyzer 10 MHz REF
IN/OUT.
(2) Connect TI SIGNAL to spectrum analyzer INPUT 50
Ω Ω .
(3) Press keys and enter values using DATA keys as listed in (a) through (h) below:
(a) SIGNAL off (option 002 not lit).
(b) FUNCTION sine wave.
(c) ENTRY AMPTD.
(d) -20 dBm.
(e) ENTRY DC OFFSET.
(f) 0 VOLT.
(g) ENTRY FREQ.
(h) 20 MHz.
(4) Adjust spectrum analyzer controls to display 20 MHz fundamental and at least
four harmonics. All harmonics will be at least 25 dB below fundamental.
(5) Enter 14 MHz using TI DATA keys. Adjust spectrum analyzer controls to
display 14 MHz fundamental and at least four harmonics. All harmonics will be at least 30
dB below fundamental.
(6) Enter 1.9 MHz using TI DATA keys. Adjust spectrum analyzer controls to
display 1.9 MHz fundamental and at least four harmonics. All harmonics will be at least
40 dB below fundamental.
(7) Enter 190 kHz using TI DATA keys. Adjust spectrum analyzer controls to
display 190 kHz fundamental and at least four harmonics. All harmonics will be at least
60 dB below fundamental.
(8) Enter 100 kHz using TI DATA keys. Adjust spectrum analyzer controls to
display 100 kHz fundamental and at least four harmonics. All harmonics will be at least
60 dB below fundamental.
(9) Enter 40 kHz using TI DATA keys. Adjust spectrum analyzer controls to
display 40 kHz fundamental and at least four harmonics. All harmonics will be at least 65
dB below fundamental.
(10) Disconnect TI from spectrum analyzer.
(11) Connect TI SIGNAL to audio analyzer INPUT HIGH using 50
Ω feedthrough
termination.
(12) Press keys and enter values using DATA keys as listed in (a) through (c) below: