The Tektronix 2642A is an FFT analyzer with a DC to 200 kHz frequency range. It performs signal acquisition and processing, and uses a PC running MS-DOS connected via a serial port for mass storage and graphics.
It has two or four inputs with dedicated 12-bit (optionally 16-bit) ADCs, and an optional arbitrary function generator. Another option is a "zoom" feature that provides a span as small as 10 Hz about the frequency of interest.
|Frequency range||DC to 200 kHz|
|Real-time bandwidth||100 kHz max. (single channel autospectrum with fast additive averaging, display off, 2048 point frame size)|
|Dynamic range||75 dB, extended to 90 dB with Opt. 16 or 17 (16-bit ADCs)|
|Channels||2 (optionally 4), matched ±0.075 dB (DC to 50 kHz)|
|Transient Capture||500 K Samples, extended to 3.5 M with Opt. 6M (6 MB)|
|FFT performance||32-bit floating point FFT, 64 tp 4096 points|
|Spectral Lines||25 to 1600|
|Input Impedance||1 MΩ // 200 pF|
|Max Input Level||±30 V|
|Weight||Standard accessories: 12.3 kg (27 lbs)|
|Power||90 − 250 VAC, 48 to 66 Hz, >120 W|
Front panel: CH1-CH4 inputs, BNC connector; Signal generator output BNC connector (50 Ω; ±10 V);
- (Specifications based on 1994 published documentation unless otherwise specified)
- Opt. 1H: Four Input Channels
- Opt. 16: Two 16-Bit Input Channels
- Opt. 17: Four 16-Bit Input Channels
- Opt. 6M: Large Data Memory (add 6 MB)
The 2642 uses a National NS32CG160 32/16-bit CPU and an AT&T DSP32C Digital Signal Processor.