HP 54753A User Manual page 61

Horizontal There are two choices for horizontal mode: track source and
manual . The track source mode sets the control of the horizontal scaling
for the normalized trace to that of the source channel. When manual mode
is selected, the Y Scale and Y Position menus appear allowing you to
independently change the horizontal scale and position for the normalized
trace.
TDR/TDT Setup Normalize response . . .Normalize scaling . . . Horizontal
Key Path
Establish normalization & ref plane
The Establish normalization & ref plane function establishes the filter values used
to normalize a channel and to set the reference plane for TDR and TDT
measurements. This function must be performed separately for TDR and TDT
modes. The normalization and reference plane must be re-established when
power is lost or when the instrument is turned off. However, the values used
for normalization and reference plane calculations can be stored to and re-
loaded from disk. (See the Disk Menu chapter in the HP 83480A, HP 54750
User's Guide for more information.)
The reference plane must be established before ohm, % reflect or gain units are
selectable for the channel. Also, the Reference ref plane function is not
available in the Marker menu.
The function steps you through the normalization and reference plane
procedure for the selected measurement type. The procedure steps are
displayed at the top of the screen. The items required for calibration are shown
in Table 4-2.
The normalization filter values and reference plane become invalidated when the
timebase scale, record length or channel bandwidth is changed. Also, the
normalization process will not be able to remove small synchronous noise in the
channels baseline if the timebase position is changed. For most measurements
this error is very small.
HP 54753A TDR/TDT Setup Menu
Normalize response . . .
4-7