Preliminary Information; M2 Features; Installation; Display - Tektronix 7D12 Operator's Instruction Manual

Section 3-7012 Operators
OPERATING
M2
INSTRUCTIONS
PRELIMINARY INFORMATION
M2 Features
The M2 SamplelHold Module operates with the 7D12
AID Converter unit and a Tektronix 7000-series oscillo-
scope. The M2 provides the capability to measure voltage or
difference voltage at any point in time. The voltage
measurement MODE and RANGE are front-panel con-
trolled, and the INPUT signal can be AC or DC coupled.
This section describes the operation of the front-panel
controls, giving first time and general operating information.
Installation
The M2 is designed to operate in the 7D 12 AID
Converter, which can be installed in any vertical plug-in
compartment of Tektronix 7000-series oscilloscopes equip-
ped with readout. See module installation, Fig. 1-4.
Display
The output from the M2 Sample/Hold Module is a DC
analog voltage. The 7D 12 converts the analog signal to a
digital readout display that is presented on the mainframe
CRT. The input and trigger waveforms can also be
presented on the mainframe CRT from the 7D12 vertical
amplifier section. A digital readout of the measured voltage
appears in the upper graticule division and the vertical
sensitivity is displayed directly below in the lower graticule
division. The readout and waveform displays are written by
the CRT beam along with the readout and waveforms from
other plug-in units on a time-shared basis. Since there is an
analog output signal presented on the CRT, it is necessary
to select the 7 D 12 and M2 vertical compartment with the
oscilloscope Vertical Mode switch. The voltage measure-
ment is accomplished by connecting an external trigger
signal to the 7D12 external trigger input. The point of
measurement on the displayed input signal coincides with
the transition point of the displayed trigger gate signal.
The voltage readout display ranges from 000 to 2000
with a
>
symbol for over-ranging. The measurement units
and decimal positions are determined by the M2 RANGE
switch setting. The 7D12 VERTICAL DISPLAY ATTEN
switch sets the first significant figure of the vertical
sensitivity readout display.
®
OPERATING CHECKOUT
General
When shipped from the factory, the M2 has been
calibrated to meet the specifications listed in Table 3-2 and
is ready to be used with a 7D 12 AID Converter and a
readout-equipped Tektronix 7000-series Oscilloscope.
Steps 1 through 30 of the following procedure provide
an operational check to verify satisfactory operation of the
unit and the associated oscilloscope. This portion of the
procedure is intended as a quick functional check only and
should be performed each time the M2 and 7D12 is placed
in a different oscilloscope.
The remainder of the procedure demonstrates the basic
operation of the M2 MODE, RANGE, and COUPLING
switches. See the M2 front panel control and connector
functions, Fig. 3-1. It is recommended that the entire
procedure be followed completely for familiarization with
the instrument. Operation of the oscilloscope is described
in the oscilloscope instruction manual.
Vertical display sensitivity in relation to various control
settings are shown in Table 3-1. The tolerances given for the
digital readout are for units being operated in an ambient
temperature range of +15°C to +40°C.
TABLE 3-1
Vertical Display Sensitivity
(Volts/Division)
M2
7012 VERTICAL DISPLAY ATTEN
RANGE 1X 2X
5X
2V 100 mV
200 mV 500mV
20V
1 V 2V 5V
Preliminary Instructions
1. Set the 7D12 internal Display Mode switch to the
Chop position_ See Fig. 1-3.
2. Insert the M2 Module into the 7D12 AID Converter
and install them in a vertical compartment of a 7000-series
oscilloscope.
3-1