Tektronix TDS1001C-EDU, Service Manual

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Speci fi cations
Table 1: Signal acquisition system characteristics (cont.)
Characteristic
Description
At the front panel connector, 300 V
RMS
, Installation Category II; derate at 20 dB/decade above 100 kHz to
13 V peak AC at 3 MHz and above.
Maximum Input Voltage
Based on sinusoidal or DC input signal. The maximum viewable signal while DC coupled is ±50 V offset
±5 V/div at 4 divisions, or 70 V. AC coupling allows measuring signals on a DC level up to 300 V. For
nonsinusoidal waveforms, peak value must be less than 450 V. Excursions above 300 V should be less
than 100 ms in duration, and the duty factor is limited to < 44%. The RMS signal level must be limited to
300 V. If these values are exceeded, damage to the instrument may result.
8 bits except at 2 mV/div
Number of Digitized Bits
Displayed vertically with 25 digitization levels per division, 10 divisions dynamic range.
2 mV/div setting is generated by digital multiplication and the resolution is reduced. Given 100 levels
available, the resolution is >6.5 bits.
Sensitivity Range 2 mV/div to 5 V/div in 1-2-5 sequence with the probe attenuation set to 1X.
The Display Gain Variable function allows the user to vary the vertical display gain continuously over the
full range.
Display Gain Variable
Resolution is that of the coarse gain from which these data are constructed. Fine gain values (for
instance 120 mV/div) are acquired at the next higher coarse gain setting (in this case 200 mV/div).
The Display Gain Variable is achieved by digital multiplication of the data to obtain the settings between
the 1-2-5 gain settings.
Hard copy outputs to printer will be exactly the same as seen on screen even when the Display Gain
Variable is used.
However, WAVEFORM DATA obtained through the I/O interface is limited to the 1-2-5 gain settings.
1X, 10X, 20X, 50X, 100X, 200X, 500X, 1000X voltage attenuation.
5, 1, 500 m, 200 m, 20 m, 10 m, 1 m V/A current scale factor.
Probe Scale Factors
This adjusts the display scale factor of the instrument to accommodate various probe types.
Accuracy of the probe used must be added to the accuracy speci
fi cations of instrument.
No automatic probe interface is provided, so you must verify that the settings match the probe
characteristics. The probe check function allows setting of the proper attenuation for voltage probes.
Acquisition Modes Sample, Peak Detect, Average
Envelope mode not provided
Front panel settings are retained when the instrument power is turned off and on with the power switch.
The settings are retained when the line power is turned off and on.
Retained Front Panel
Settings
The instrument periodically saves front panel settings after settings are changed. There is a delay of
three seconds after the last change and before the storage of the settings in memory.
2 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual