Equipment information

Sencore SC61 Analyzer
Manufacturer:
Sencore
Model: SC61
Date:
Category: Measurement instruments
Group: Analyzer
Description: Waveform Analyzer
Information:

Introduction The SC61 Waveform Analyzer represents the first improvement in waveform measuring techniques since the first Oscilloscope was introduced over 50 years ago. Before the SC61, all oscilloscopes were strictly analog devices. Even.- measurement of peak-to-peak amplitude, time, or frequency required matching the waveform to CRT graticule markings, estimating parts of a CRT division or part of a cycle of the waveform and multiplying the size of the waveform times the setting of the horizontal or vertical switches. The measurements were not very- accurate (typical accuracy on an analog scope is ±15% when interpretation error is considered), were time consuming, and were subject to many errors (such as forgetting to turn the vernier to the calibrated position). The SC61 combines the waveform analyzing capability of a high quality Oscilloscope with the speed, accuracy, and freedom from errors of a computer. The SC61 has a microcomputer that monitors the vertical and horizontal circuits at all times. You just push a button when you want to measure all or part of a waveform. The microcomputer determines the reading, automatically sets the decimal, and produces a direct digital readout of the value. Features The SC61 Waveform Analyzer starts with a high quality Oscilloscope. The CRT display section has a bandwidth of 60 MHz. and is usable to 100 MHz to show the needed detail when analyzing digital signals. Specially designed sync circuits (using differential amplifiers and emitter-coupled logic stages) provide solid triggering with the fewest trigger adjustments possible. The input capabilities extend from 5 millivolts per division all the way to 2000 volts DC or AC peak-to-peak. Special video circuits simplify analyzing composite video waveforms. Sync separators produce stable triggering on these complex signals. Additional stages eliminate the half-line shift on interlaced signals, while others eliminate vertical sync from interfering with digital readings of signals displayed at the horizontal sweep rate. Video preset buttons allow pushbutton selection of vertical or horizontal scanning frequencies. There are two types of digital measurements made through the same Probe used for the CRT display. The first three functions for each channel are called the Auto-Tracking™ tests. Auto-Tracking means the microcomputer automatically tracks the CRT display at all times. The three Auto-Tracking functions are DC volts, peak-to-peak volts, and frequency. All three functions measure the entire waveform. The second group of digital tests are the Delta tests which let you measure part of a waveform. These tests measure the peak-to-peak amplitude, time, or frequency of any part of the waveform shown on the CRT. Both types of digital tests are unaffected by the vertical or horizontal verniers or position controls, allowing the CRT display to be any size you want without affecting the accuracy of the digital readout. All tests are automatically ranged or directly interfaced to the input attenuators for direct readings. One final test allows the frequency of the signal applied to channel A to be compared to the frequency of the signal applied to channel B. The digital display shows the ratio of the two frequencies to troubleshoot divider or multiplier stages.

These manuals are available for the above equipment:

Manual Type: Service Manual Sencore-12848-Manual-Page-1-Picture
Pages: 16
Size: 8.00 Mbytes (8387118 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date:
Quality: Scanned document, all readable.
Upload date:
MD5: 9b7d34bdb44daa610da186bd4c38845e
Downloads: 1 since 17 May 2020
Information:

Calibration Procedure

Sencore-12848-Manual-Page-1-Picture


Manual Type: User Manual Sencore-12849-Manual-Page-1-Picture
Pages: 48
Size: 15.20 Mbytes (15936152 Bytes)
Language: english
Revision:
Manual-ID/Number: 4201
Date:
Quality: Scanned document, all readable.
Upload date:
MD5: 7af4131d9e6f1264ec17b6095e3216d3
Downloads: 1 since 17 May 2020
Information:

DESCRIPTION Features ... 4 Specifications ... 4 Controls ... 6 OPERATION AC Power Connection ... 10 Setting up the waveform, a simplified approach ... 10 Locating the trace with the Beam Finder ... 11 Selecting the proper CRT display pushbutton ... 12 Single Trace Operation ... 12 Automatic dual-trace operation ... 12 Forcing the SC61 into the dual-alternate mode ... 12 Inverting the channel A trace for special tests ... 13 Algebraic addition or subtraction of signals (A + B or B - A) ... 13 Locating Amplifier distortion ... 13 Reducing the level of undesirable signals ... 13 Using the A + B mode to determine the timing of two signals ... 14 Vector (X-Y) operation ... 14 Vector graticule ... 15 Using the vector mode to align audio tape heads ... 15 Using the SC61 with sweep generators or curve tracers ... 16 Applying signals to the vertical inputs ... 16 39G183 low-capacity probes ... 16 The special design of the 39G183 ... 16 Connecting the 39G183 to the SC61 ... 17 Connecting the 39G183 to the circuit ... 17 Test Probe ground connectors ... 18 Probe frequency compensation ... 18 3000 volt protection extends to 650 KHz ... 19 DP226 direct Probe ... 19 Connecting to a Generator output ... 19 Indirect connections with the PL207 ... 20 Selecting the AC or DC coupling mode ... 20 Setting the VOLTS/DIVISION switch ... 20 Using the CRT to measure P-P volts ... 20 Using the CRT to measure DC levels ... 21 Tips on measuring DC volts ... 21 Obtaining a locked-in trace ... 21 TRIGGER SOURCE ... 22 TRIGGER MODE ... 22 TRIGGER LEVEL ... 22 TRIGGER POLARITY ... 23 Special trigger conditions ... 23 Sinewaves with distortion ... 23 A.M. signals ... 24 Signals that are multiples of each other ... 24 Digital data from microprocessors ... 24 Videosignals ... 24 Setting the TIMEBASE-FREQ switch ... 25 Selecting the sweep rate fora known frequency ... 25 Video waveforms ... 25 Video presets ... 26 Using the TIMEBASE-FREQ switch to view video signals ... 26 Viewing VITS and VIRS ... 26 Measuring time with the TIMEBASE-FREQ switch ... 27 Rise time measurement ... 27 Fall time measurement ... 28 Determining frequency with the TIMEBASE-FREQ switch ... 28 Secondary user controls ... 28 ASTIGMATISM ... 29 TRACE ROTATOR ... 29 TRACE BAL ... 29 INVERT BAL ... 29 Rear panel fuses and connectors ... 30 Fuse replacement ... 30 Z AXIS INPUT ... 30 Accessory (output) jack ... 30 The digital readout ... 30 Digital readout not affected by CRT controls ... 30 Measuring DC volts ... 30 Accuracy between channels ... 31 DC loading ... 31 Peaking or nulling signals ... 31 Measuring over 2000 volts DC ... 31 Measuring peak-to-peak volts ... 32 Using VPP without the CRT ... 33 Using the VPP function to set the CRT display ... 33 Frequency measurements ... 33 Frequency accuracy versus resolution ... 33 Signal levels needed for a stable reading ... 33 Frequencies below 10 Hz require longer counting time ... 34 Some video frequencies read low ... 34 The first frequency reading takes from 1 to 3 seconds ... 34 Removing signal causes last reading to freeze ... 34 The Delta measurements ... 35 Delta peak-to-peak ... 36 Slow sweep speeds require longer APPtime ... 36 Delta peak-to-peak and video signals ... 36 Delta Time measurements ... 37 Measuring duty cycle ... 37 Measuring the delay between two signals ... 37 Adjusting a circuit for a desired time ... 38 Slower sweep speeds produce slower readings ... 39 Measuring rise time or fall time ... 39 Using the Delta functions to measure frequency ... 39 Measuring phase shift ... 40 Frequency ratio tests ... 41 MAINTENANCE Service and Calibration ... 42 Circuit Description and Calibration Instructions ... 42 Converting the SC61 from 120 VAC to 220 VAC operation ... 42 SERVICE AND WARRANTY Inside Back Cover

Sencore-12849-Manual-Page-1-Picture


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