DC Source/Calibrators, Tunable Electronic Filters, Wideband Power Amplifiers Precision Phasemeters, Distortion Analyzers Function Generators, RC Oscillators “Quality” in Test and Measurement Since 1949 Model 6900B Fully Automatic Distortion Analyzer • Fully Automatic Distortion Measurements • Frequency Range: 5Hz to 1MHz, Auto Nulling • Voltage Range: 100mV rms to 130V rms, Auto Leveling • Measures Distortion Down to 0.005% • Measures AC Voltage: 0.010V rms to 130V rms, 5Hz to 1MHz • Internal Oscillator: 1kHz, <.003% Distortion • “Hands Off” Operation AC VOLTMETER DESCRIPTION As an ac voltmeter, the 6900B measures rms voltage from The Krohn-Hite Model 6900B is the first and only fully automatic Distortion Analyzer to provide an easy solution to your distortion typically 3Hz to 1MHz at input levels from 10mV to 130V with an accuracy of 2%. A 3 digit auto-ranging display provides 1mV and AC voltage measurements over the frequency range from 5Hz resolution. to 1MHz. EASE OF OPERATION Compare the ease of operation of the 6900B to any other ADDITIONAL FEATURES distortion analyzer. The 6900B requires only an input signal. Auto The Model 6900B provides a distortion output signal which is the frequency nulling, auto level setting and auto-ranging of the input signal after the fundamental is removed. This distortion digital meter automatically displays the total harmonic distortion signal can be used for additional analysis with an oscilloscope or (THD). The 6900B measures THD from typically 3Hz to an spectrum analyzer. An analog output provides a dc voltage unprecedented 1MHz and input levels from 100mV rms to 130V proportional to the distortion signal. An ultra-low distortion rms. Ultra-low distortion can be measured with a resolution of (<.003%) 1kHz sinewave oscillator can be used as a source for 0.001%. Measurements can be made in less than 3 seconds from checking linearity of components and system distortion 50Hz to 1MHz. characteristics. An optional BCD output is available, making the 6900B very useful in an automatic test system. This fully FILTERS Three switch-selectable filters are provided. A 400Hz high-pass automatic distortion analyzer is ideal for both precision laboratory measurements and routine production testing. It provides faster to reduce the effects of hum, 30kHz and 80kHz low-pass to reduce error free measurements for the unskilled operator. the effects of high frequency noise. An internal low-pass tracking filter is automatically activated at distortion levels below 0.1%. Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301 Page 1 of 3 Tel: 508-580-1660; Fax: 508-583-8989; www.krohn-hite.com; email: sales@krohn-hite.com 6900BData.vp Fully Automatic Distortion Analyzer Model 6900B Residual Distortion and Noise: SPECIFICATIONS DISTORTION METER Input Frequency Specification Fundamental Frequency Range: 5Hz to 1MHz 20Hz to 20kHz <0.02% automatically tuned over entire specified input frequency range. An intermittent meter display indicates an 0.1V to 0.25V <0.03%, 5Hz to 50kHz, “out-of-range” condition. 5Hz to 1MHz rising to 0.5% at 1MHz. Input: No presetting required over input level from 100mV 20Hz to 20kHz <0.01% rms to 130V rms; Impedance, 110k ohms shunted by 100pF. 0.25V to 130V <0.02%, 5Hz to 50kHz, 5Hz to 1MHz Distortion Range: A digital panel meter with auto-ranging rising to 0.5% at 1MHz. displays percentage of total harmonic distortion (THD) to 19.9%. Filters: 400Hz High-Pass: –3dB at 400Hz ±10%, Measurement (%) Resolution (%) 40dB/decade rolloff. .10 to 2.00 .01 30kHz Low-Pass: –3dB at 30kHz ±5%, 60dB/decade rolloff. 2.0 to 19.9 .1 80kHz Low-Pass: –3dB at 80kHz ±5%, 60dB/decade rolloff. Distortion Measurement Accuracy: Distortion Output (Residual signal after fundamental is nulled): Input Volts/Dist. Frequency Specifications Voltage: 100mV rms/% THD. Levels Impedance: <500 ohms. ±15% of reading or Analog Output: 100mV dc/% THD. 10Hz to 50kHz 0.01% whichever is greater. Impedance: <1k ohms. Display: 3 digit meter with auto-ranging. ±15% of reading or 5Hz to 100kHz 0.02% whichever is .1 to .25: AC VOLTMETER greater. >0.01% Frequency Range: 5Hz to 1MHz. ±15% of reading or 0.1% 100kHz to 500kHz Voltage Range: 0.01V rms to 130V rms. whichever is greater ±25% of reading or 0.5% 500kHz to 1MHz Voltage Range Resolution whichever is greater. 0.01V to 1V 0.001V ±15% of reading or 10Hz to 50kHz 0.005% whichever is 1V to 10V 0.01V greater. 10V to 130V 0.1V ±15% of reading or 5Hz to 100kHz 0.01% whichever is .25 to 130: greater. Accuracy: ±2% ±1 digit from 10Hz to 500kHz; ±5% ±1 digit >0.005% from 5Hz to 1MHz over specified voltage range. ±15% of reading or Display: 3 digit meter with auto-ranging. 100kHz to 500kHz 0.05% whichever is greater. Input Impedance: 110k ohms shunted by 100pF. ±25% of reading or 0.5% OSCILLATOR OUTPUT 500kHz to 1MHz whichever is greater. Frequency: 1kHz, fixed. Output: 5V rms at 3mA max. Settling Time (to 0.1% THD): Typically <3s from 50Hz to 1MHz. Longer at lower frequencies. Distortion: <0.003%. Fundamental Rejection: Greater than 10dB below Impedance: 600 ohms. residual THD. Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301 Page 2 of 3 Tel: 508-580-1660; Fax: 508-583-8989; www.krohn-hite.com; email: sales@krohn-hite.com 6900BData.vp Fully Automatic Distortion Analyzer Model 6900B GENERAL OPTIONS Meter Display: 0.55", 7 segment, green LED. BCD Output: Provides 13 lines of parallel BCD output, plus 1 MODE output, 3 decimal point outputs and 4 separate Controls: 3-state control lines. Compatible with DTL, RTL and TTL Front Panel: Mode switch for selecting either logic. VOLTMETER or DISTORTION operation. Filter switch 002, dB Readout: Switch selectable. Displays the distortion for selecting 400Hz high-pass, 30kHz low-pass or being measured either in percent (%) or dB, as referenced 80kHz low-pass operation. Power switch. to the level at the Analyzer INPUT. Rear Panel: Switches for selecting 120/240V ac line Rack Mounting Kit: Part No. RK-316 permits the operation, or NORMAL/LOW ac line voltage. installation of the Model 6900B into a standard 19" rack Connectors (BNC): spacing. Front Panel: Input, 1kHz oscillator output and Extended 1 Year Warranty: Part No. EW6900B. distortion output. OPTIONAL ACCESSORIES Rear Panel: Input, analog output. CAB-025: Cable, BNC, 3ft, Low Noise. Operating Temperature Range: 0°C to 45°C. Maximum DC Component: 100V. Specifications are subject to change without notice. Isolation to Chassis: 500V dc. Power Requirements: Switch selectable, 90-110, 108-132, 180-220 or 216-264 volts, single phase, 50-400Hz, 15 watts. Dimension and Weights: 3" (8.9cm) high, 16" (42.2cm) wide, 14" (37.5cm) deep; 11 lbs (5.2kg), shipping, 13 lbs (6.1kg). Accessories: 3-terminal line cord; operating manual. Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301 Page 3 of 3 Tel: 508-580-1660; Fax: 508-583-8989; www.krohn-hite.com; email: sales@krohn-hite.com 6900BAData.vp