Tektronix TPS2000B Series, Service Manual

Page: 15 / 92

Speci fi cations
These speci fi cations apply to all TPS2000B Series oscilloscopes. To verify that an
oscilloscope meets speci fi cations, it must fi rst meet the following conditions:
The oscilloscope must have been operating continuously for twenty minutes
within the speci
fi ed operating temperature range. (See Table 9.)
You must perform the Do Self Cal operation, accessible through the Utility
menu, if the operating temperature changes by more than 5 °C.
The oscilloscope must be within the factory calibration interval of one year.
The V/div speci fi cations apply with the probe calibration set to 1X probe
mode.
Speci fi cations begin in the following table. All speci fi cations are guaranteed
unless noted "typical." Speci fi cations that are marked with the symbol are
checked in the Performance Veri fi cation section.
Signal Acquisition System
Table 1: Signal acquisition system
Characteristic Description
Number of Input Channels Two (TPS2012B) or four (TPS2014B, TPS2024B) identical channels, digitized simultaneously
Input Coupling DC, AC, or GND
AC coupling connects a capacitor in series with the input circuitry. The DC input impedance
becomes very high, since capacitance is in series with all paths to ground.
Ground coupling mode provides a reference waveform derived from the values identi
fi ed during
SPC. This reference waveform shows visually where signal reference (ground) is expected
to be.
Input Impedance, DC Coupled 1 M Ω ±2% in parallel with 20 pF ±3 pF
Overvoltage Category Maximum Voltage
CAT I and CAT II 300 V
RMS
CAT III 150 V
RMS
Maximum Input Voltage (between
Signal and Reference at input
BNC)
1
At front panel connector, 300 V
RMS
; derate at 20 dB/decade above 100 kHz to 13 V peak
AC at 3 MHz and above.
All inputs are rated 300 V CAT II, signal to
fl oating common.
Derate at 20 dB/decade above 100 kHz to 13 V peak AC at 3 MHz and above. For
nonsinusoidal waveforms, peak value must be less than 450 V. Excursion above 300 V should
be less than 100 ms duration. RMS signal level, including any DC component removed through
AC coupling, must be limited to 300 V. If these values are exceeded, damage to the oscilloscope
may result. Refer to the Overvoltage Category description. (See Table 9 on page 9.)
Maximum Float Voltage Rated 600 V
RMS
CAT II.
Between instrument common (chassis) and BNC shell. Using rated connectors or accessories.
Number of Digitized Bits 8-bit resolution (except when set to 2 mV/div), each channel sampled simultaneously.
TPS2000B Series Digital Storage Oscilloscopes Service Manual 1