Sencore-tech-tips-136-how-the-sc61-ppv-test-finds-interfering-signals-missed-by-the-crt ALONE – Manual (PDF)

Erik from ManualsPlus — Fri, 26 Dec 2025 11:03:49 +0000

The Sencore SC61 Waveform Analyzer manual explains how to use the device's digital readout and CRT to identify interfering signals that may not be visible on the CRT alone, detailing setup and operation procedures to ensure accurate peak-to-peak voltage measurements. It also provides troubleshooting tips for discrepancies between digital and CRT readings, such as adjusting trace intensity or sweep speed to reveal hidden waveform imperfections like overshoot and random spikes.

Brand: Sencore-tech-tips-136-how-the-sc61-ppv-test-finds-interfering-signals-missed-by-the-crt
Model: ALONE
Type: manual
File size: 1.2 MB

Manual Overview

The Sencore SC61 Waveform Analyzer utilizes both CRT and digital readouts to measure peak-to-peak voltages, with the digital display offering higher accuracy due to its 2% precision and 0.5 dB frequency response. The digital and CRT readings are independent, allowing adjustments to the CRT without affecting digital measurements. This independence is crucial for identifying waveform imperfections like overshoot and random spikes, which may not be visible on the CRT at normal intensity. Increasing the CRT trace intensity can reveal hidden signals, allowing for direct comparison with digital readings. The SC61’s digital circuits capture the full signal amplitude, even if parts are not displayed on the CRT. For troubleshooting, the Delta PPV function can isolate and measure desired signals by adjusting the scope’s sweep speed and trace intensity. This method helps identify discrepancies between CRT and digital readings, ensuring accurate diagnostics of interfering signals.

Quick Issues Covered

Diagnose discrepancies between digital and CRT peak-to-peak readings.
Identify overshoot and random spikes missed by CRT alone.
Use schematics for circuit tracing to locate interfering signals.

Overview

The SC61 Waveform Analyzer is designed to provide digital accuracy in waveform analysis. It features a digital readout that remains independent of the CRT controls, allowing for adjustments without causing measurement errors. The SC61 measures the true peak-to-peak amplitude of signals, whether displayed on the CRT or not, and its digital circuits provide accurate readings even when waveform imperfections like overshoot or random spikes are present. The manual covers how to use these features to identify and measure interfering signals that may not be visible on the CRT alone.