Table of Contents
Advertisement
t'
B
11
H
r -
-1.
N
-----.
9
-
-
-
.........
0
M
J
K
' -
--
480 CHAR
L
E
G
F
1920 CHAR
2565170
'-
Diagram 2-3. Alignment Mask, Model 2
Paragraph 5.1.1 describes the comprehensive checkout
procedure that uses Test Pattern 1. This pattern is also used
during the execution of several Troubleshooting Diagrams.
2.2.1.2 Test Pattern 2 (Diagram 2-5)
Test Pattern 2 is used to align the Modell display image as
described in paragraph 5.2.1. All data is protected and
displayed in normal intensity. The audible alarm (if
installed) sounds when this pattern appears on the screen.
22.1.3
Test Pattern
3
(Diagram 2-6)
Test Pattern 3 is used to align the Model 2 image as
described in paragraph 5.2.1. All data is protected and
displayed in normal intensity. The audible alarm (if
installed) sounds when this pattern appears on the screen.
22.1.4
Test Pattern
5
(Diagram 2-7)
Test Pattern 5 loads the display station buffer with all
available uppercase and lowercase character codes. The
2-4
./
audible alarm (if installed) sounds when this pattern
appears on the screen.
2.2.2 Requesting RFT Patterns
RFT patterns can be requested for 3277 Display Stations
attached to a local control unit (3272) or to a remote
control unit (3271). Patterns can
be
requested from one
display station to be displayed on another. To display
patterns, the controlling CPU must be operating under
as
BTAM
(Operating System
Basic Telecommunications
Access Method) or DOS BTAM (Disc Operating System
Basic Telecommunications Access Method), and the appli-
cation program must be set up to accept test requests. The
system programmer can verify that the requirements to
request RFT patterns are met. The eight test patterns (four
EBCDIC and four ASCII) that can be requested by RFTs
and their identification numbers are listed in Diagram 2-9.
Advertisement
Table of Contents
