GUI reference
R&S
®
ZNA
746
User Manual 1178.6462.02 ─ 20
0
1
1
1 1 0
...
...
Va Vb Vc Vd
In dB the pre- and post cursors are defined as:
●
Pre Cursor = 20 log
10
( Vd / Vc )
●
Post 1 Cursor = 20 log
10
( Vb / Va )
●
Post 2 Cursor = 20 log
10
( Vc / Vb )
Simple applications of the emphasis only define the Post 1 Cursor. Use a negative
value (in dB) for increasing the amplitude of the first bit after a transition. Below an
example for Post 1 Cursor = -3dB:
The FIR filter coefficients are found by solving the equations:
c
-1
+ c
0
– c
1
– c
2
= Va
c
-1
+ c
0
+ c
1
– c
2
= Vb
c
-1
+ c
0
+ c
1
+ c
2
= Vc
-c
-1
+ c
0
+ c
1
+ c
2
= Vd
subject to the normalization condition | c
-1
| + | c
0
| + | c
1
| + | c
2
| = 1.
Active
Enables/disables pre-emphasis.
Remote command:
CALCulate<Chn>:EYE:EMPHasis:STATe
Cursor Settings
Sets the weights of the filter taps in the pre-emphasis FIR filter.
Applic softtool
