Brief Procedures
TDS 684A, TDS 744A, & TDS 784A Service Manual 4–13
HVerify that the trigger READY indicator on the front panel flashes
about once every second as the waveform is updated on-screen.
4. Remove the test hookup: Disconnect the probe from the channel input and
the probe-compensation terminals.
Equipment
Required One probe such as the P6245 or P6139A
One 720 K or 1.44 Mbyte, 3.5 inch DOS-compatible disk.
You can use a disk of your own or you can use the Programming
Examples Software 3.5 inch disk (Tektronix part number 063-1134-XX)
contained in the TDS Family Programmer Manual (Tektronix part
number 070-8709-XX).
Prerequisites None
1. Install the test hookup and preset the oscilloscope controls:
a. Hook up the signal source: Install the probe on CH 1. Connect the probe
tip to PROBE COMPENSATION SIGNAL on the front panel;
connect the probe ground to PROBE COMPENSATION GND. See
Figure 4–3 on page 4–8.
b. Insert the test disk: Insert the disk in the disk drive to the left of the
monitor.
HPosition the disk so the metal shutter faces the drive.
HPosition the disk so the stamped arrow is on the top right side. In
other words, place the angled corner in the front bottom location.
HPush the disk into the drive until it goes all the way in and clicks
into place.
c. Initialize the oscilloscope:
HPress save/recall SETUP.
HPress the main-menu button Recall Factory Setup.
HPress the side-menu button OK Confirm Factory Init.
d. Modify default settings:
HSet the vertical SCALE to 200 mV.
HSet the horizontal SCALE for the M (main) time base to 200 ms.
Notice the waveform on the display now shows two cycles instead of
five.
HPress CLEAR MENU to remove the menus from the screen.
Verify the File System