General Radio 1142A Features:
3 Hz to 1.5 MHz in 5 ranges
0.1% Resolution through scale expansion
As as fm discriminator:
Measure fm deviation and spectra
Record oscillator drift or aging
Measure doppler shift
Analyze tape recorder dynamics
Convert frequency to dc for X-Y plotters
Linearize voltage-controlled oscillators
For making frequency measurements, the 1142-A, Frequency Meter and Discriminator, can be built-in scale expansion for greater accuracy and high resolution: with 1156-A Decade Scaler for measurements to 15 MHz; an dwith an oscillator to heterodyne the unknown frequency. By this means even higher frequencies can be measured, and resolution is increased in proportion. At 100 MHz, drift and incidental fm can be measured to better than one partin 10-9.
Dc and fm outputs permit frequency changes to be recorded and the GenRad 1142, Frequency Meter and Discriminator, to be used as an fm discriminator.
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