37
CCD Output - Lens Covered
Name
Location
Voltage
V Out
Imager IC201/pin 8
0.3Vp-p
Time Base = 5 msec/div
Horizontal Timing Signals
Name
Location
Voltage
H1
Imager IC201/pin 15
3Vp-p
H2
Imager IC201/pin 16
4Vp-p
RG
Imager IC201/pin 14
3Vp-p
Time Base = 20 usec/div
Vertical Timing Signals - 1
Name
Location
Voltage
V1A
Imager IC201/pin 5
22Vp-p
V1B
Imager IC201/pin 6
7Vp-p
V2
Imager IC201/pin 4
7Vp-p
Time Base = 20usec/div
When the lens is covered so the picture is dark, no voltage from the
phototransistors is output. The signal carrier pulses (RG) equivalent to a
clock signal is the only information on the CCD Output line.
Horizontal Pulses
There are two horizontal pulses and one RG pulse that are used to clock
or transfer the voltages out the CCD imager. One RG pulse carries one
phototransistor voltage so this frequency is as high as the pixel density of
the CCD imager. The gaps in the H waveforms correspond to the hori-
zontal blanking interval at the right or left sides of the picture.
Vertical Input Pulses
There are six vertical timing pulses required to shift the rows of voltages
down toward the exit row. Keep in mind that the extra-tall voltage spike
on the odd numbered V1A and V3A signals are necessary to complete
the shift. These spikes are supported by the +15Vdc input. The remain-
der of the signal is below the 0V baseline (supported by the –7.5Vdc
power source).
P K D
C H 1 5 0 0 m V ~ M T B 5 .0 0 m s - 1 .8 0 d v c h 1 -
1
T
0.3Vp-p
V Out
CH1!2.00 V=
CH2!2.00 V=
CH3!2.00 V~ CHP MTB20.0us- 1.86dv ch1+
1
2
3
T
H1
H2
RG
C H 1 ! 1 0 .0 V =
C H 2 ! 5 .0 0 V =
1
2
3
T
0
V1B
V2
V1A
0
0
