Pioneer Plasma Display Monitor 502MX - Manual (Page 103)

103
Menu Mode
7) Setting the clamp position
Plugging in RGB (G ON SYNC) signals and a sync signal simultaneously may produce inappropriate intensity
reproduction, with an over-bright screen or images with a greenish cast. If this occurs, set “CLAMP : MODE 2”. For
most situations, leave “CLAMP : MODE 1”.
Clamp pulse (a timing pulse necessary for intensity reproduction), is generated in two ways, “a” and “b”, as shown
in Figure 1.
SET UP
SET : CHANGE
EXIT
5∞ 3 : SELECT
SETTING : PC
SIGNAL : RGB
TERMINAL : D-SUB
3CLAMP : MODE 1
ABL : OFF
V. ENHANCE : 0
H. ENHANCE : 0
SCREEN
MAIN MENU
ALL RESET
PICTURE
POWER SAVE
3SET UP
BRIGHT : 0
COLOR : 0
TINT : 0
SHARP : 0
RESET
SET : NEXT
CONTRAST : 0
MENU : MENU OFF
5∞ 3 : SELECT
Figure 1: Generation of a clamp pulse
a. Generating a clamp pulse
from separate sync
Clamp effective area
Clamp effective area
G (Green)
H (Separate
Sync Signal)
Clamp pulse
b. Generating a clamp pulse
from G ON SYNC
G (G ON SYNC)
Clamp pulse
Figure 2: When a sync signal is supplied simultaneously
with G ON SYNC
Clamp effective area
G (G ON SYNC)
H (Separate
sync signal)
Clamp pulse (In
CLAMP:MODE 1)
Clamp pulse (In
CLAMP:MODE 2) Correct clamp timing
1 Select SETUP.
Screen 1
2 Move the cursor to CLAMP, and use the SET
button to change the setting.
Pressing the SET button toggles clamp mode
between MODE 1 and MODE 2.
Screen 2
(NOTE) No setting possible during input of component image signals
Set-able condition:
RGB signal received via INPUT 3 or 4.
Factory preset: INPUT 3 : MODE 1
INPUT 4 : MODE 1
Sync signals are monitored in “CLAMP : MODE 1”, and the unit is automatically switched to generate a clamp pulse by
method “a“ shown in Figure 1 in the presence of sync signal, and by method “b“ in the absence of a sync signal. But
when a sync signal is fed simultaneously with G ON SYNC, the unit perceives a sync signal, and generates a clamp
pulse as shown in “a“ in Figure 1. The generated clamp pulse is mis-timed, making correct reproduction of intensity
impossible.
In this case, unplug the sync signal or set “CLAMP : MODE 2“.
In “CLAMP MODE 2“, the clamp pulse is generated by pulse“b“in Figure 1, whether or not a sync signal is present,
ensuring correct reproduction of intensity.
(NOTE) The figures above are for illustrative purposes only.
(NOTE) Please regard the case of composite sync input as being the same as the case of separate sync input.