Tektronix WFM 601A, Service Manual

Page: 96 / 368

Adjustment Procedures
WFM 601A, WFM 601E, & WFM 601M Service Manual
5–5
Two, high-precision test instruments are recommended in a few adjustment
procedures. Table 5–1 lists the special test equipment and the procedures where
they are used. In all cases, the special equipment is required due to the measure-
ment accuracy required to verify a specification.
Table 5–1: List of special equipment and where it is used
Equipment Procedure where used
Tektronix
TG2000/DVG1
Opt S1 Y/G Monitor Out Gain
EQEye Gain
Jitter Null Adjust
Jitter Gain
Arrowhead NTSC Composite
Arrowhead PAL Composite
Tektronix 1780/81 Y/G Monitor Out Gain (WFM 601M only)
Using the Adjustment Software
The Adjustment Software is a DOS program on a 3.5 inch disk included with this
manual. The floppy disk contains the Adjustment Procedure software which you
use to return the instrument to its performance specifications. You should either
make a copy of the Adjustment Software disk or copy the Adjustment Software
onto a system hard disk.
The software requires an IBM compatible PC with a DOS 3.3 or higher and a
3.5-inch high density floppy disk drive.
While you are running the Adjustment Software, you will make some adjust-
ments using the arrow keys on the PC. Such adjustment steps follow the
adjustment name with “(PC)”. For example, a PC key adjustment might resemble
the following line:
ADJUST – X10 V GAIN (PC) to reduce the waveform to a horizontal line.
To install the Adjustment Software, copy it to a floppy disk or a hard disk and
run it from that source. To make a copy of the Adjustment Software, use the
following procedure:
1. Insert the Adjustment Procedures disk into the PC floppy drive. If you wish
to make a copy, place a formatted disk in second floppy drive, such as the B
drive.
NOTE
. On your PC, the drive letter for the floppy drive may be A or B. Enter the
appropriate letter for your floppy drive in the following steps.
Where Special Equipment
is Used
Installing the Software