Reference
ST2400A SDH Test Set User Manual
3-31
The
MS-REI INJECT
menu has three functions:
•
A number of MS-REI errors can be injected into one frame. The ERROR key is used to
select the menu, and the arrow keys are used to position the cursor over the n/FRAME (n per
frame) field. The number of MS-REI errors per frame can be set from 1 to 255 using the INC
and DEC keys. Pressing the Enter key while this field is selected will insert that number into a
single frame.
•
Move the cursor to x.xSEC and use the INC and DEC keys to set the period from 0.1 to 9.9
seconds. Pressing the ENTER key when the cursor is in the x.xSEC position will inject the
number of MS-REI errors (n/FRAME) for the period (x.xSEC), effecting multiple frames. For
example, one MS-REI per frame could be injected for 9.9 seconds. An asterisk and the word
ACTIVE
will be displayed for the duration of the MS-REI injection.
•
Moving the cursor under the letter
s
in x.xSec or pressing the INC key when the period is set
to 9.9 seconds will access the CONT (continuous) command, shown on the lower right side of
the figure. Positioning the cursor over CONT and pressing the Enter key will insert the
number of MS-REI (n/FRAMES), continuously. An asterisk and the word
ACTIVE
will be
displayed indicating that the error is being injected. Use the right arrow key to move the
cursor to OFF and press ENTER. The asterisk and the word
ACTIVE
will no longer be
displayed, indicating the error injection is off.
The
RANDOM BER (Bit-Error-Rate) INJECT
main menu is used to set the rate to a number
from 1.0E-3 to 0.1E-9. Pressing the Enter key will inject errors at that rate on different STM-16
channels, selected at random.
The
Selected Channel BER
(Bit Error Rate) main menu is used to set the rate to a negative
exponent from 1.0E-3 to 0.1E-9 for the CHAN (channel) selected. Positioning the cursor over the
selected channel (CHAN cc) in the lower right field and use the INC and DEC keys to select the
STM-1 channel number.
The
INJECT XX ERROR
menu, permits recurring error conditions to be set. Position the cursor
under the XX and use the INC key to select the error type. The INJECT period (on time) is
located in the top right field, 2.5S in this case. It can be set from 0.1 to 9.9 seconds. The WAIT
period (off time) is in the lower right field, 6.0S in this case. It can be set from 1.0 to 30.0
seconds. The rates are set in each individual menu, B1, B2, B3, MS-REI, RANDOM BER, and
CHANxx BER. An asterisk (*) will switch between the wait and inject states, indicating which is
active. Only one error condition can be activated at any one time.
NOTE: Bit Error Rates are inserted as a negative exponent. An error rate of 1.0E-6 would equate
to the decimal number derived from sending one errored bit in a million bits. In other words, one
divided by one million would equal 0.000001 or 1.0E-6 decimal.
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...