Module Features; M2 Sample/Hold Module; M3 Rms Volts Module; Module Installation - Tektronix 7D12 Operator's Instruction Manual

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7012 will unlatch. Continue pulling on the latch to slide
the 7012 out of the oscilloscope.
Module Features
Ml Multifunction Module. The M 1 Module is shown
partially installed in the 7012. The M 1 is capable of
measuring resistance, DC volts, and temperature. The
floating I NPUT allows up to 1,000 volts elevation from
ground, with a 10 megohm input impedance on the DC
scale. The input to the M 1 is presented as a digital readout
on the CRT of the associated oscilloscope, along with
information encoded by other plug-in units.
M2 Sample/Hold Module. The M2 Module is designed to
measure the voltage amplitude or the difference voltage
between any two points of a waveform connected to the
INPUT connector. Two separate analog displays are pre-
sented on the mainframe CRT; the signal waveform to be
measured that is connected to the M2 INPUT, and the
trigger signal connected to the 7012 EXT IN connector.
The point of measurement on the waveform coincides with
the trigger signal transition point. The input to the M2 is
presented as a digital readout within the upper division of
th'e CRT viewing area, and the vertical sensitivity is
presented directly below in· the lower division of the CRT
7012 Operating InstructionS/Specification-7012 Operators
viewing area. A Tektronix P6055 probe, which is equipped
with a readout coding ring, can be used with the M2
Module to extend its range. The readout coding ring on the
probe connects to a circuit in the AID Converter unit that
automatically corrects the readout displayed on the CRT to
the actual deflection factor at the probe tip.
M3 RMS Volts Module. The M3 Module converts the
input signal to a DC equivalent of the true RMS value of
that signal, in either AC or DC coupling. The input signal is
displayed on the mainframe CRT, and the RMS readout is
presented in the upper division of the CRT viewing area.
The vertical sensitivity readout is presented directly below,
in the lower division of the CRT viewing area.
Module Installation
All modules are calibrated and ready for use with the
7012 as received. To install, align the upper and lower rails
of the module with the 7012 module-compartment tracks
and fully insert it. The front is flush with the front of the
7012 when the module is fully inserted. Lock the module
securely in position by rotating the retaining knob clock-
wise until it is finger-tight. (See Fig. 1-4.) To remove the
module, reverse the above procedure.
7D12 SPECIFICATION
Characteristic
Input Characteristics
Accuracy
Measurement Rate
Auto Trigger
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Limits and tolerances given in the Supplemental Infor-
mation column are provided for user information only and
should not be interpreted as Performance Requirements.
Other 7012 characteristics are included in the module
Specification Tables.
TABLE 1-1
Electrical Characteristics
Performance Requirement
See Module Specifications, M1, Table 2-1; M2,
Table 3-1; M3, Table 4-2
Supplemental Information
Approximately 4 measurements per second,
internally adjustable (with R4411 down to
approximately 1 measurement per second. The
adjustable range can be increased up to 12
measurements per second by changing the value
of R407.
1-3