The 1840-A measures audio-frequency
power into any desired load. Its important uses include the measurement
of:
- Power output of oscillators, amplifiers, preamplifiers, transformers,
transducers, and low frequency lines
- Output impedance by adjustment of the load to yield maximum
power indication
- Frequency response characteristics of amplifiers, transformers,
and other audio-frequency devices
This instrument is basically a multi-tapped audio-frequency transformer
with a fixed secondary load. Its two front-panel switches connect
eight identical primary windings and six secondary taps in various
combinations to provide a total of 48 different primary impedances.
The maximum power rating can be extended for any given impedance
with the use of a simple T-network attenuator, design data for
which are supplied with the instrument. |
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