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Bench function and signal generator calibration

“One volt at one kilohertz” still leaves a bench technician with a question. Does the drawing specify peak-to-peak voltage or RMS, and what load is connected to the generator output?

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Oscilloscope, waveform generator and frequency counter, equipment illustration
Equipment illustration

Write down a complete output setting

One request line might read “channel 1, sine, 1 kHz, 1 V peak-to-peak into 50 Ω, zero DC offset”. Replace those example values with the ones used on your bench. Some generators display the expected voltage for a selected load. The voltage at an instrument with a high-impedance input can differ from the value expected across a terminated input.

For square waves, give duty cycle as well as frequency if the pulse width matters to the circuit. An arbitrary waveform saved under a programme number needs enough information to identify the waveform and the particular feature to be measured. List the requested channels individually if they carry different outputs.

Frequency and amplitude need separate results

If an incoming inspection sheet calls for frequency only, say so. If it also gives voltage limits, pair every voltage with its waveform, frequency and load. This lets RTS review the references and frequency span for the actual job. A request for RF power, modulation or microwave output needs its own review with the model and connector details.

A shared generator on the test line

Note which attenuator, feedthrough termination or cable stays with the bench. Each accessory that travels needs an identifier on the dispatch note. At IMT Sohna, for example, a bench technician can release the generator while the production fixture stays wired in place. Agree which items the quotation covers before stores packs them.

RF signal generators

An RF signal generator requires frequency and output-level points tied to a named connector. Include modulation modes only where they are part of the requested work, along with attenuators or amplifiers in the normal path. Keep the external frequency reference separate from the generated-output requirement. RTS will review the RF method and service route; the low-frequency electrical scope should not be read as RF coverage.

Vector signal generators

For a vector signal generator, identify the baseband or I/Q arrangement, installed waveform options and required modulation measurements. Separate carrier frequency and output amplitude from modulation-quality results. Provide the test waveform and software revision where these determine the evaluation, with confidential production content removed. RTS should confirm which functions and references can be supported before the instrument is booked under a general signal-generator enquiry.

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