Circuit
Description
—7623/R7623
Service
connectors
of vertical
plug-in
units. A special coding ring
around
the input connector
of the
plug-in unit senses the
attenuation
ratio
of the probe (with readout-coded probes
only).
The probe contains a resistor which results in
additional column
current.
For
example,
if a
10X attenua
tor
probe
is connected to a plug-in with the coding for
100
microvolts as
shown
in Fig. 3-32,
an
additional unit of
current
is added
to the column analog data during time-slot
1. Since two units of current
were encoded by
R111 (see
Fig. 3-32),
this additional current results in a total of three
units
of
column analog current during this
time-slot.
Referring
to the Character Selection Matrix, three units of
column
current along with
the
two units of row current
encoded
by
R10 indicates that
the prefix should be
reduced. Since
this
instruction occurs in the same time-slot
which
previously
indicated that two
zeros
should be added
to
the
display and only
one instruction can be encoded
during
a time-slot, the zeros do not appear in the display.
The
CRT readout
will now be changed to 1 mV (readout)
program
produced
by plug-in
same
as for previous example.
Likewise, if a 100X readout-coded probe is connected to
the
input
of
the plug-in unit, the column current during
time-slot
1 will
be increased two units for a
total of four
units
of
column current. This addresses an instruction in
the
Character Selection
Matrix which reduces the prefix
and
adds one zero to the display.
The resultant CRT
readout
with
the previous program is 10 mV.
Three other
lines of information are connected from the
plug-in
compartments to the Readout System. The column
and
row
analog data
from channel 2 of a dual-channel
plug in are
connected to the Readout System through
terminals
A38
and B38 of the
plug in interface,
respec
tively.
Force readout
information is encoded on terminal
A35;
function of this input is described under Column and
Row
Data Switches.
The
preceding information gave
a
typical example of
encoding
data from an amplifier plug-in unit. Specific
encoding
data and circuitry is
shown in
the individual
plug-in
unit
manual.
Column
and
Row
Data
Switches
The
readout data from the plug-in units is connected to
the Column
and Row Data Switch stages in the Readout
System.
A
column-data
line and a row-data line convey
analog
data
from each of
the eight data sources (two
channels
from each
of
the
four plug-in compartments).
Channel
Address
TABLE
3-3
Pin 1
U2232
"Identify"
Command
Pin
11
U2250
Pin 8
U2250
Pin 9
U2250
Channel
Selected
HI
HI
HI
HI
Channel 1
Left
Vertical
HI
HI
HI
LO
Channel 2
Left
Vertical
HI
HI
LO
HI
Channel 1
Right
Vertical
HI
HI
LO
LO
Channel 2
Right
Vertical
HI
LO
HI
HI
Channel 1
Horizontal
HI
LO
HI
LO
Channel 2
Horizontal
The
Column Data
Switch U2190 and the Row
Data
Switch
U2180 receive the Channel
Address No. 1 code
from
the
Channel Counter. This binary code directs
the
Column
Data
Switch and the Row Data Switch as to which
channel
should be the source of the readout data. Table 3-3
3
42
Summary of Contents for 7623
Page 1: ...MANUAL 7623 R7623 STORAGE OSCILLOSCOPE SERVICE MANUFACTURERS OF CATHODE RAY OSCILLOSCOPES ...
Page 51: ...Fig 3 2 Block diagram of Logic circuit Circuit Description 7623 R 7623 Service ...
Page 72: ...W NJ 00 Fifl 3 22 Low Voltage Power Supply detailed block diagram ...
Page 73: ...Circuit Description 7623 R 7623 Service ...
Page 74: ...CO NJ CD Fig 3 22 Low Voltage Power Supply detailed block diagram cont ...
Page 75: ...Circuit Description 7623 R 7623 Service ...
Page 97: ...Circuit Description 7623 R7623 Service 3 51 ...
Page 98: ...Circuit Description 7623 R7623 Service Fig 3 39 Output Pulses for the Storage Circuits 3 52 ...
Page 103: ...Circuit Description 7623 R7623 Service 3 57 ...
Page 108: ... Ç À Fig 4 2 Location of circuit boards in the 7623 ...
Page 109: ...Fig 4 3 Location of circuit boards in the R7623 Maintenance 7623 R 7623 Service ...
Page 113: ...Maintenance 7623 R7623 Service Fig 4 6 Circuit Isolation Troubleshooting Chart 4 9 ...
Page 165: ...7623 BLOCK DIAGRAM ...
Page 166: ...7623 R7623 Service Front of Board ...
Page 167: ......
Page 168: ...FL ...
Page 169: ......
Page 173: ...7623 Logic ...
Page 175: ...Vertical Interface A4 ...
Page 178: ...Vertical Interface ...
Page 180: ...Vertical Amp A5 ...
Page 184: ...Horizontal Amp A6 ...
Page 186: ...7623 TO P450 VERT AMP 3 HORIZONTAL AMPLIFIER ...
Page 188: ...Output Signals A7 ...
Page 190: ...FROM 7G23 Output Signals g ...
Page 195: ...FROM LV POWER SUPPLY 7623 CRT CIRCUIT ...
Page 197: ......
Page 200: ......
Page 202: ...Storage Output A14 ...
Page 204: ......
Page 205: ...7623 R7623 Service Fig 6 14 A15 Cal Storage circuit board ...
Page 208: ......
Page 209: ...7623 R7623 Service Fig 6 15 A16 Readout System circuit board ...
Page 213: ......
Page 242: ...7623 R7623 OSCILLOSCOPE b ...
Page 243: ...151 ...
Page 246: ...20 ...
Page 247: ...7623 R7623 OSCILLOSCOPE 112 ...