Tektronix 2715, Руководство пользователя

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Spectrum Analyzer Menus
2715 User Manual
6–57
5. Press [DEMOD].
The DEMOD/TG menu appears.
6. Press [2] to select FM DEMODULATOR.
The LED adjacent to FM VOL on the front panel lights, the spectral display
reappears, and you may hear the 2715 sweeping.
7. If you hear nothing, turn the outer barrel of the LEVEL control clockwise to
increase the volume.
8. Press [ZERO SPAN] to hear whatever is being transmitted by the station.
9. Leave the 2715 in zero span, and turn the FREQ/MKRS knob to tune it as
you would a radio receiver. The signal level rises as you tune in stations and
falls to the noise floor when no station is present.
10. Press [DEMOD] [0] to turn off the FM demodulator.
11. Press [ZERO SPAN] to return to the normal spectral display.
To listen to AM transmissions, connect an antenna to the 2715 as outlined in
Appendix B: Broadcast AM, FM, and TV Signal Sources. The antenna will
probably need to be much longer than for FM.
12. Press [CHAN/FREQ] [1] [X] to set the center frequency to 1 MHz.
13. Press [SPAN/DIV] [1] [0] [Y] to set span to 10 kHz/div.
14. Ensure RES BW and SWEEP are set to AUTO.
15. Ensure that the calibrator is turned off.
16. If necessary, adjust the reference level until you can see signal peaks in the
500 kHz to 1.6 MHz area (this is the medium-wave broadcast band).
17. Tune the 2715 until a strong signal is centered.
18. Press [DEMOD].
The DEMOD/TG menu appears.
19. Press [1] to select AM DEMODULATOR.
The LED adjacent to AM VOL on the front panel lights, and the spectral
display reappears.
20. Press [ZERO SPAN] and adjust the LEVEL control as needed until you
hear whatever is being transmitted by the station.
Listening to AM
Transmissions