Incoming Inspection Test
ST2400A SDH Test Set User Manual
B-13
Error Rate Inject Test
In this part, the transmitter injects an error rate into the receiver and verifies the responses of the receiver.
1.
On the transmitter side of the front panel, press ERROR until the display shows the Random BER
Inject menu.
2.
Using the LEFT/RIGHT cursors, select 1.0E-3 and then press ENTER. Observe that the red LED
within the ERROR switch is now lit.
3.
In the 2.4Gb/s STATUS section, observe that the error lights for B1, B2, and REI/FEBE remain lit.
You have now injected an error rate into the receiver.
4.
On the receiver side of the front panel, press ERROR until the display shows B1 and B2 on the top
line. Observe that all of them have increasing error rates.
5.
On the front panel, press PAUSE/RESUME until the
red LED within the switch is lit.
6.
On the display, observe that the error rates are no longer increasing, but are fixed at one value. Also,
in the 2.4Gb/s STATUS section, observe that the error lights for B1, B2, and REI/FEBE remain lit.
7.
On the display, press PAUSE/RESUME until the
red LED within the switch is no longer lit.
8.
On the display, observe that the error rates are once again increasing. Also, in the 2.4Gb/s STATUS
section, observe that the error lights for B1, B2, and REI/FEBE still remain lit.
9.
On the front panel, press RUN/STOP twice to restart a test.
10.
On the receiver side of the front panel, press ERROR until the display shows B2 on the bottom left
corner. Observe that BER = 1.0E-3.
NOTE: B1 BER will not measure 1.0E-3 since this exceeds the maximum error rate measurable with
B1 error detection. Also, MS-REI (FEBE-L) will not measure 1.0E-3 since random error
injection will only cause REI errors when the M1 byte containing the REI count is errored.
11.
On the transmitter side of the front panel, press ERROR until the display shows the Random BER
Inject menu.
12.
Using the LEFT/RIGHT cursors, select OFF and then press ENTER. Observe that the red LED
within the ERROR switch is now off.
13.
In the 2.4Gb/s STATUS section, observe that the error lights for B1, B2, and REI/FEBE are now off.
14.
On the receiver side of the front panel, press ERROR until the display shows B1, B2, and FEBE-L
across the top line. Observe that all of the errors have stopped increasing.
15.
On the front panel, press RUN/STOP twice to clear all errors.
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...