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Equipment/BBC AF signal generator: Difference between revisions
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Equipment/BBC AF signal generator (view source)
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[[Beware]]''' This unit has a built in amplifier. The loudspeaker terminals on the back can produce up to 40 volts peak to peak and a lot more current than a typical 600ohm signal generator output. You can blow up things like computer audio inputs! | [[Beware]]''' This unit has a built in amplifier. The loudspeaker terminals on the back can produce up to 40 volts peak to peak and a lot more current than a typical 600ohm signal generator output. You can blow up things like computer audio inputs! | ||
== Controls == | |||
Frequency Control | |||
== Front panel == | |||
'''Frequency Control''' | |||
This is a three turn potentiometer, the markings on the dial bear little relationship to the output frequency but the control is smooth and noise free. | This is a three turn potentiometer, the markings on the dial bear little relationship to the output frequency but the control is smooth and noise free. | ||
Frequency Range | '''Frequency Range''' | ||
Four ranges, 0.1Hz-100Hz, 1Hz-1kHz, 10Hz-10kHz and 100Hz-100kHz. | Four ranges, 0.1Hz-100Hz, 1Hz-1kHz, 10Hz-10kHz and 100Hz-100kHz. | ||
Output Level | '''Output Level''' | ||
Adjusts level at PO jack at rear and drive to amplifier. | Adjusts level at PO jack at rear and drive to amplifier. | ||
Output On/Off | '''Output On/Off''' | ||
Sweep Rate | '''Sweep Rate''' | ||
Four sweep speeds, 0.1,0.2, 0.5 and 1 octave/sec. | Four sweep speeds, 0.1,0.2, 0.5 and 1 octave/sec. | ||
Sweep On/Off | '''Sweep On/Off''' | ||
Starts a single sweep from the current setting of the Frequency Control down the scale to the low frequency of the selected range. To initiate another sweep return the switch to Off and then On again. | Starts a single sweep from the current setting of the Frequency Control down the scale to the low frequency of the selected range. To initiate another sweep return the switch to Off and then On again. | ||
Modulation Frequency % | '''Modulation Frequency %''' | ||
Four values, 1, 2, 5 and 10% | Four values, 1, 2, 5 and 10% | ||
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'''Modulation On/Off''' | '''Modulation On/Off''' | ||
Rear Panel | |||
== Rear Panel == | |||
'''Mains Inlet''' (IEC) | '''Mains Inlet''' (IEC) | ||
