HP 54753A User Manual page 168

Differential TDR Measurements
Making Differential TDT Measurements
Deskewing the TDT Channels
In addition to the TDR step generators requiring deskewing the two TDT
destination channels require deskewing. Use the following procedure to deskew
the TDT destination channels.
1 Connect an SMA cable to channel 3 of the electrical plug-in module.
2 Connect another SMA cable to channel 4 of the electrical plug-in
module.
Press the
3 TDR/TDT
4 Press the Preset TDR/TDT
5 Connect one end of a female-to-female SMA adapter to the end of the
channel 1 cable and the other end of the adapter to the channel 3 cable.
Connect one end of a female-to-female SMA adapter to the end of the
6
channel 2 cable and the other end of the adapter to the channel 4 cable.
Press the
7 Time base
8 Change the Position
display.
9 Press the key followed by the
blue
Press the
10 Start src
11 Press the Enter
12 Press the Stop src
Press the
13 Enter
14 Press the Enter
8-20
softkey to select
TDT
softkey.
key.
until positive going TDT step is in the middle of the
milli
softkey and select
softkey.
softkey and select
softkey.
softkey (Figure 8-14).
.
key.
.
channel 3
.
channel 4