Reference
ST2400A SDH Test Set User Manual
3-15
Transmitter Menus and Displays
TX Source Mode
Pressing the MODE key will access the TX MODE SELECTION menu. It is used to choose one
of the three data modes that will produce the 2.4 Gb/s output signal. The three choices are: an
external input (EXT) from the Transmitter front panel 155 or 622 Mb/s inputs, an internally (INT)
generated 2.4 Gb/s signal, or a through (THRU) mode from the Receiver's 2.4 Gb/s input
connector. The EXT and INT modes function on both the ST2400A Transceiver and ST2400A
Transmitter units. The THRU mode only functions on an ST2400A Transceiver unit.
TX MODE SELECTION
EXT <INT> THRU
Figure 3-6. Transmitter Input Menu
The EXT input can be 155 Mb/s optical (STM-1), 622 Mb/s optical (STM-4), or 155 Mb/s CMI
electrical signal. On the Transmitter 155 / 622 Input Status section there are three yellow LED
indicators, two optical and one electrical. The appropriate LED will indicate the input signal.
The INT mode generates an unequipped SDH 2.4 Mb/s (STM-16) signal with valid transport
overhead. The first column of the first STM-1 can be modified, adding alarms and errors.
ST2400A LCD Display (SDH)
INT TX MAPPPING STRUCTURE
VC4: <1> 4C 16C
The menu above will only appear in
SDH
measurement mode.
This menu will be available only if
INTERNAL
mode selected and the correct STM-4c/STM-16c
hardware is present. For this menu,
VC4
will be automatically selected, and will be the only
available mode.
This menu will not be available in “
EXTERNAL
” or “
THRU
” mode.
If “
EXT
” mode is selected and the TRIB channel is set to “
ALL
”, the “
INT TX TEST PATT
”
menu will be unavailable.
Note
If
STS48C
or
VC4-16C
mapping is chosen, Random BER injection is limited to
channel 1
only,
and will be forced to
channel 1
if it is not set there already. Also any errors being injected will be
stopped when any mapping mode is changed.
Summary of Contents for ST2400A
Page 7: ...ST2400A SDH Test Set User Manual vii Index I 1...
Page 12: ...General Safety Summary xii ST2400A SDH Test Set User Manual...
Page 13: ...Getting Started...
Page 14: ......
Page 24: ...Operating Basics...
Page 25: ......
Page 44: ...Reference...
Page 45: ......
Page 94: ...Reference ST2400A SDH Test Set User Manual 3 49...
Page 95: ...Appendices...
Page 96: ......
Page 113: ...Specifications SDH ST2400A SDH Test Set User Manual A 17...
Page 134: ...Factory Defaults C 4 ST2400A SDH Test Set User Manual...