Circuit
Description—
7623/R7623
Service
the Plug-In
Chop
Buffer stage.
Idealized waveforms showing
the
timing relationship
between the input
and output
signals for
this stage
are shown
in
Fig. 3-8.
Vertical
Mode
Control
The
Vertical Mode Control stage
is made
up of discrete
components CR124-CR125,
CR126,
CR130-CR155,
CR172,
and buffer amplifier Q132-Q137. These com
ponents
develop
the Mainframe Vertical Mode Command
which is connected
to
the Main
Interface circuit (vertical
plug-in
compartments and trigger
selection circuitry) and
the
Vertical Interface circuit to indicate which vertical unit
is
to
be displayed.
When this output level is HI, the right
vertical
unit is displayed and when it is LO, the left vertical
unit
is displayed.
The VERT
MODE switch located on diagram 7 provides
control
levels for
this stage. This switch provides a HI level
on
only
one
of four output
lines to indicate the selected
vertical
mode;
the remaining lines are LO. The fifth mode,
LEFT, is indicated
when
all four output lines are LO.
Operation
of
this
stage in all positions of the VERT MODE
switch
is as follows:
Right. When
the VERT MODE switch is set to RIGHT,
a
HI
level is connected to the Buffer Amplifier through
R126
and
CR126. The LO level at the anodes of diodes
CR
125
and CR130 holds them reverse biased. The resultant
Vertical
Mode
Command output from
the Vertical Mode
Buffer
Amplifier is a HI level to indicate that the right
vertical unit
is to be displayed.
Chop. In
the
CHOP position of the VERT MODE
switch,
a
HI level is applied to the anodes of diodes
CR124CR125 through
R125.
Both diodes
are forward
biased
so
the Vertical
Chop Signal from pin 9 of U123B can
pass
to the emitter of Q132. This signal
switches between
the HI and
LO levels
at a one-megahertz
rate and it
produces a
corresponding Mainframe Vertical Mode Com
mand
output at
the
emitter of Q137. When this output is
Clock
pulses
from
Clock Generator stage
(2 MHz)
Pm
9 U123B
(1 MHzl
Pin
5
U123A
(500
kHz)
Mainframe
Chop
Signal
To
Vertical
Mode
Control
stage
Vertical
Plug in
Chop
Signal
To Plug-In
Chop Buffer stage
Fig.
3-8. Idealized input
and output
waveforms
for
Chop
Counter stage.
3-13
Содержание 7623
Страница 1: ...MANUAL 7623 R7623 STORAGE OSCILLOSCOPE SERVICE MANUFACTURERS OF CATHODE RAY OSCILLOSCOPES ...
Страница 51: ...Fig 3 2 Block diagram of Logic circuit Circuit Description 7623 R 7623 Service ...
Страница 72: ...W NJ 00 Fifl 3 22 Low Voltage Power Supply detailed block diagram ...
Страница 73: ...Circuit Description 7623 R 7623 Service ...
Страница 74: ...CO NJ CD Fig 3 22 Low Voltage Power Supply detailed block diagram cont ...
Страница 75: ...Circuit Description 7623 R 7623 Service ...
Страница 82: ...Ca W G Fig 3 27 Detailed block diagram of Readout System Circuit Description 7623 R 7623 Service ...
Страница 97: ...Circuit Description 7623 R7623 Service 3 51 ...
Страница 98: ...Circuit Description 7623 R7623 Service Fig 3 39 Output Pulses for the Storage Circuits 3 52 ...
Страница 99: ...Circuit Description 7623 R7623 Service Fig 3 40 Basic Block Diagram of the Storage Timing 3 53 ...
Страница 103: ...Circuit Description 7623 R7623 Service 3 57 ...
Страница 108: ... Ç À Fig 4 2 Location of circuit boards in the 7623 ...
Страница 109: ...Fig 4 3 Location of circuit boards in the R7623 Maintenance 7623 R 7623 Service ...
Страница 111: ...Maintenance 7623 R7623 Service Fig 4 5 Electrode configuration for semiconductors used in this instrument ...
Страница 113: ...Maintenance 7623 R7623 Service Fig 4 6 Circuit Isolation Troubleshooting Chart 4 9 ...
Страница 165: ...7623 BLOCK DIAGRAM ...
Страница 166: ...7623 R7623 Service Front of Board ...
Страница 167: ......
Страница 168: ...FL ...
Страница 169: ......
Страница 173: ...7623 Logic ...
Страница 175: ...Vertical Interface A4 ...
Страница 178: ...Vertical Interface ...
Страница 180: ...Vertical Amp A5 ...
Страница 184: ...Horizontal Amp A6 ...
Страница 186: ...7623 TO P450 VERT AMP 3 HORIZONTAL AMPLIFIER ...
Страница 188: ...Output Signals A7 ...
Страница 190: ...FROM 7G23 Output Signals g ...
Страница 195: ...FROM LV POWER SUPPLY 7623 CRT CIRCUIT ...
Страница 197: ......
Страница 200: ......
Страница 202: ...Storage Output A14 ...
Страница 204: ......
Страница 205: ...7623 R7623 Service Fig 6 14 A15 Cal Storage circuit board ...
Страница 208: ......
Страница 209: ...7623 R7623 Service Fig 6 15 A16 Readout System circuit board ...
Страница 213: ......
Страница 242: ...7623 R7623 OSCILLOSCOPE b ...
Страница 243: ...151 ...
Страница 246: ...20 ...
Страница 247: ...7623 R7623 OSCILLOSCOPE 112 ...