Tektronix 1760 series, User Manual

Page: 116 / 180

Basic Measurements
1760 Series Component Waveform/Vector Monitor User Manual
4-16
Lightning Measurements
The Lightning display gives indication of absolute and rela-
tive amplitudes and relative timing of the three components.
For a Lightning display, apply color-difference signals (Y, P
B
and P
R
) to the rear panel CH-A1, A2, and A3 (or CH-B1, B2,
and B3) connectors. Push the front-panel
LIGHTNING
button.
The instrument is forced to A123 input display (it can be
changed to B123).
Use the
CONFIG—FORMAT
menu (page 3-21) to set
DISPLAY
to
LIGHTNING
, and select the appropriate format for your
system. Lightning is most useful in the color difference for-
mats:
SMPTE, EBU, BETA, and M
II
. (Selecting
GBR
will pro-
vide a square display.) Use the
CONFIG—VECTOR
menu to
select 75% or 100% bars. This will change the size of the
electronic graticule to accommodate the input signal. Push
CLEAR MENU
to clear the menu readout.
Channel 2 is compared to Channel 1 in the top half of the
display; Channel 3 is compared to Channel 1 in the lower
half. (See Figure 4-14.)
525/60
C
M
B
R
M
C
G
B
R
G
YL
YL
White
Black
Setup
White
Figure 4-14.
Lightning display showing correct timing.