LCD Menus and Displays
3–4
ST112 SONET Transmission Test Set
and output LEDs and their 3c/12c mapping LEDs will light. Use the INC or DEC key to scroll
through the other SONET QUICKSET menus and the arrow keys to make your choice. Choosing
any OC rate will activate the Transmitter Laser Output.
W A R N I N G !
Before activating the LASER, its output must be connected to a circuit.
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A second press of the SETUP key will access the QUICK DSX SETUP menu, used to
configure the asynchronous cross connect signals. Selecting either DSX-1 or DSX-3 from
this menu, will enable its respective electrical output, and disable the optical output. When
DSX-1 is selected the receiver DSX-1 LED will illuminate. DSX-3 will illuminate the
receiver DSX-3 LED and the transmitter DSX-3 LED.
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Another push of the setup key will access the DSX-1 LINE CODE menu. It is used to select a
line code for the DSX-1 signals. Either AMI (Alternate Mark Inversion) or B8ZS (Bipolar 8
Zero Substitution), as the case may be, can be used to test T1 compatible networks and
network elements.
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Another push of the setup key will access the OC-12 CHANNEL NUMBERING menu.
STANDARD uses the STS-3/STS-1 channel numbering scheme, starting
with: 1,1; 1,2; 1,3; 2,1; 2,2; 2,3; 3,1; ..., and detailed in the Bellcore GR-253-CORE
Standard. The C1 ID numbers the channels in sequence from 1 to n, according to their
appearance on the high speed line. Standard indicates which tributary (STS-n) the channel
came from and C1 ID does not.
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The STORE/RECALL SETUP menu is next. It is used to access either the USER stored
setup or the FACTORY DEFAULT setup. Pressing the enter key will access the submenu
from which one of the ten LOC (locations) can be RCLL (recalled) or STOR (stored). Up
to ten individual user setups can be saved in memory locations 0 through 9. A unique 10
character label can be stored with each saved setup. The arrow keys are used to position
the cursor anywhere in the label area, and the INC or DEC key is used to scroll through the
ASCII characters—including numbers and symbols. Moving the cursor to FACTORY
DEFAULT and pressing the enter key will access that NO or YES menu—that defaults to
NO. Moving the cursor to YES and pressing the enter key will restore the factory default
configuration. Pressing the setup key will return to the STORE/RECALL SETUP display.
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REPORT / TEST TIME is the next setup menu. It is used to access a complete set of
measurement control, test, and report submenus that will be detailed in the next section of
this chapter. Pressing the setup key will move to the next main menu.
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The VIEW ANGLE can be set to one of eight integers (0 through 7). Zero should be the best
view angle when the ST112 SONET Transmission Test Set is positioned below the operator
and 7 is best when the operator is looking up at the Test Set front panel. The change is
interactive; it is executed whenever the increment or decrement key is pressed. In the same
menu, the VOLUME can be set using integers 0 through 9. Zero is off and 9 is the loudest.
Errors and alarms activate the beeper, unless the volume is set to zero.
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AUXILIARY SETUP is the next setup menus. Pressing the enter key will access the
auxiliary setup menu system shown in Figure 3–3 and described later in this chapter.
Pressing the setup key will access the ST2400 COM LINK menu.
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