Tektronix AA501A Distortion Analyzer

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Orig CostLow BidHigh Bidaverage
$2600 (1989-new) ...
$405.00 10/4/01 #1643521135 recycled-equipment
$400.00 4/5/02 #1718646679 ohiosurplus
$255.00 4/12/02 #1720735357 ohiosurplus
$322.77 01/02/03 #3102753591 elteq (w/ TM502A & Manuals) (2 bids-started $299.99)
$406.27 8/8/04 #3831438165 abdbg (11 bids $50 start) (untested)
$515.20 1/26/06 #7583342869 jtsele (22 bids $9.99 start) (mod MQ - guaranteed to work)
$202.50 (+$14 ship) 2/17/08 #200199230950 testeq (16 bids $10 start) (tested OK)
$257.50 (+~$32 ship) 6/9/09 #280353600678 itiswhatitis0508 (3 bids $229 start) (w/opt 01-Fully operational and Calibrated)

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    The Tektronix AA501A MOD WQ (I have no idea what that is) is a Distortion Analyzer that is powered by a TM500 Serries power supply. Combined with a SG505 this makes a very nice Audio Anylasis System. Some of the specifications are:
  • Fully Automatic
  • Level, THD and db Tatio Measurements
  • Digital Readout plus analog bar graph for peaking and nulling
  • 10Hz to 100kHz frequency range
  • Has Volts, dBm or dv ratio modes
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    TEKTRONIX MODEL AA501A DISTORTION ANALYZER WITH TM502A POWER MODULE MAINFRAME

    FULLY AUTOMATED MEASUREMENT OF LEVEL, TOTAL HARMONIC DISTORION PLUS NOISE (THD + N)

    HARMONIC DISTORTION FUNCTION:
  • FUNDAMENTAL FREQUENCY RANGE- 10Hz TO 100KHz, AUTOMATICALY TUNED TO INPUT FREQUENCY
  • DISTORTION RANGES- AUTO (100%), 20%, 2%, 0.2%, AND dB (AUTORANGING)
  • ACCURACY- 20Hz TO 20KHz WITHIN +/-10% (+/-1dB) FOR HARMONICS TO 100KHz, 10Hz TO 100KHz IS WITHIN +10%(+1dB), -20%(-2dB FOR HARMONICS TO 300KHz)
  • ACCURACY IS LIMITED BY RESIDUAL THD+N AND FILTER SELECTION
  • TYPICAL FUNDAMENTAL REJECTION- AT LEAST 10 dB BELOW SPECIFIED RESIDUAL THD+N OR ACTUAL SIGNAL THD, WHICHEVER IS GREATER
  • MINIMUM INPUT LEVEL- 60mV (-22dBm)

    LEVEL FUNCTION:
  • MODES- VOLTS, dBm (600 OHM), OR dB RATIO (W/ PUSH-TO-SET 0 dB REFERENCE)
  • LEVEL RANGES- 200 uV FULL SCALE TO 200 V FULL SCALE IN 10 STEPS, MANUAL OR AUTORANGING
  • ACCURACY- 20Hz TO 20KHz +/- 2% (+2 COUNTS), +/- 0.3 dB + 0.5% OF READING
  • 10Hz TO 100KHz +/- 4% (+2 COUNTS), +/-0.5 dB + 0.5% OF READING
  • BANDWIDTH- 300KHz

    FOUR(4) BUILT-IN FREQUENCY-WEIGHTED FILTERS
    DIGITAL READOUT PLUS ANALOG-TYPE LED BARGRAPH FOR READING PEAK AND FOR NULLING