Operating Modes; Rear Interface; Electrical Characteristics - Tektronix MR 501 Instruction Manual

The amount of trace deflection produced by a signal is
determined by the signal amplitude, the attenuation factor
(if any) of the probe, the setting of the Volts/Div
pushbuttons, and the setting of the VARIABLE control.
The deflection factors indicated by the Volts/Div push-
Operating Instructions—MR 501
rotated fully clockwise.
The range of the VARIABLE control is at least 10:1. It
provides uncalibrated deflection factors covering the full
buttons. The control can be set to extend the deflection
factor to at least 10 volts/division.
OPERATING MODES
X-Y
In the X-Y mode, apply the vertical signal to the Y input
connector and the horizontal signal ta the X input
connector. The intensity modulation signal is applied to the
Z input connector. Input signal requirements are given later
in this section.
Y-T (Sweep Operation)
An RG 501 Ramp Generator can be used in conjunction
with the MR 501 Monitor to make an oscilloscope. The
signal to be observed is connected to the Y input
connector. The RG 501 Ramp Out and Gate Out con-
nectors are connected via short coaxial cables to the
MR 501 X input and Z input connectors, respectively.
Refer to the RG 501 Ramp Generator Instruction Manual
for more complete operating instructions.
Set the RG 501 triggering controls for an Auto Trig and
Ext triggering. Use the signal being observed on the Y-axis
to externally trigger the RG 501. Adjust the RG 501 Level
control to obtain a stable display on the MR 501. Refer to
the RG 501 Ramp Generator Instruction Manual for more
complete operating instructions.
lf a time-calibrated MR 501 Y-T display is desired,
connect time-markers from a time mark generator to the
MR 501 Y input connector. Use the RG 501 Ramp
Amplitude control to achieve the correct time-calibration
between the first and last graticule lines (10 divisions) on
REAR INTERFACE
Input/Output Assignment
The X and Y input and the Z input connector signals can
be applied through the rear connector if the MR 501 is
modified. The modification consists of:
1. Unsoldering the resistors going to the X and Y input
connectors.
2. Connecting the center conductor of a coaxial cable to
each resistor. Connect the shield to ground.
3. Connecting the unconnected end of the X input cable
to pin 17B (center conductor) and 17A (ground). The Y
input cable solders to pin 16A (center conductor) and 16B
(ground).
4. Unsolder the coaxial cable from the Z input con-
nector and solder it to pins 27A (center conductor) and
26A (ground).
Other Functions Available
Unassigned pins are available at the rear connector for
routing signals to and from the MR 501 for specialized
applications (see Rear Connector Pin Assignments in
Section 2). One or more compartments of a multi-plug-in
Power Module can be wired with barriers installed to
provide specific functions between compartments. See
Power Module instruction manual for additonal informa-
tion.
ELECTRICAL CHARACTERISTICS
The electrical characteristics are valid only if the
MR 501 has been calibrated at an ambient temperature be-
®
tween +20°C and +30°C and is operating at an ambient
temperature between OC and +50°C unless otherwise
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