AL-1500 AUTOMATIC DISTORTION METER
AL-1500
| Distortion, SINAD, Frequency, Level measurement |
| Two spot frequencies (400Hz, 1000Hz) |
| Optional spot frequency |
| Automatic frequency selection |
| 4 digits frequency counter |
| 3 digits Delta dB display |
| Simultaneous measurements of distortion, frequency & level |
| Two Analogue meters |
The AL 1500 is designed to speed up measurement of distortion, SINAD, frequency response and S/N ratio in radio sets stereo amplifiers, tape recorders and other audio and equipment.
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Measurement of the total harmonic distortion, THD, can be made simultaneously for two channels at 400Hz or 1000Hz.
In use, the input signals may be at either 400Hz or 1kHz since automatic, frequency selections applied during measurements.
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Measurement of the SINAD can be measured at 1000Hz.
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An advantage of this instrument is the ability to measure distortion and SINAD even when there is a small variation in the input signal level.
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This instrument can be used as not only level meter for signal inputs, 10mV 30Vrms but also frequency counter, in the 20Hz to 100KHz band.
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With 3 digits delta dB display and 4 digits counter display, frequency response and Signal / Noise ratio can be measured.
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CCITT psophometric weighting filter is made it possible to measure various (noise, S/N and etc.) radio equipment specification.
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Level, distortion or SINAD and frequency is simultaneously measured.
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No need for initial input level calibration and automatic switch over input frequency, 400Hz or 1000Hz. Total harmonic distortion is indicated without regard to "AC hum".
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On option, a single-frequency filter in the 300Hz to 3KHz range can be included for total harmonic distortion or for harmonic distortion measurement.
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| Specification | |
| DISTORTION/SINAD MEASUREMENTS | |
| Fundamental frequencies: |
400Hz for THD. 1000Hz for THD. 1000Hz for SINAD Option, Single frequency is 300 to 3000Hz range. On order, specify whether for THD or third harmonic only. |
| Distortion Measuring Range: | 0.1% to 30% in six ranges |
| SINAD Measuring Range: | 50odB in six ranges |
| Accuracy: | 5% and 10% at 0.1% range |
| Fundamental Rejection Characteristics: | Less than -80dB at 400and 1000Hz + -5% / Less than -70dB at 400 and 1000Hz + -10% |
| Input Voltage: | 3mV to 30Vrms. |
| Input impedance: | Approx. 100Kohms; unbalanced |
| Automatic Input Control Range: | 10dB; level monitor included. |
| Output terminals, to SCOPE: | Approx. 1Vrms at each full scale. / output impedance is 10Kohms. |
| LEVEL MEASUREMENTS | |
| Frequency range: | 20Hz to 100KHz |
| Input impedance: | 100Kohms; unbalanced |
| Measuring Range: | 1mV to 30Vrms |
| Accuracy: | 2% |
| Output terminals, to SCOPE: | Approx. 1Vrms at each full scale. / output impedance is 10Kohms. |
| DELTA dB MEASUREMENTS | |
| Delta dB range: | 0 to 80dB at 1V input |
| Accuracy of Delta dB: | 0.1dB |
| Display: | 3 digit LED |
| FREQUENCY MEASUREMENTS | |
| Frequency range: | 50Hz to 100KHz |
| Frequency accracy: | <100Hz 0.1Hz 100Hz~1kHz, 1Hz < 10kHz 100Hz |
| Measuring time: | 150mS |
| CCITT psophometric filter: | Complies with CCITT Volume VP 53 |
| Power: | AC 100V, 115V, 215V or 230V 50/60Hz; 8VA |
| Size: | 330W x 150H x 300D mm |
| Weight: | Approx. 7kg |
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