User's Manual

Tutorial

GB1400 User Manual 2-33

B. Locate the controls in the PATTERN box of the Generator. Make sure the

PRBS button is enabled (the LED inside this switch should be ON). Set the

Generator pattern to a 2

-1 bit PRBS as follows:

Set this parameter …to this value …using this procedure.

PRBS type PN 23 Press pattern up/down arrow keys until

PATTERN is set to PN 23

C. Locate the controls in the ERROR INJECT box of the Generator. Verify

that the Generator ERROR RATE GENERATOR is OFF (the LED within the switch should

be OFF). If the LED in the error inject RATE key is ON, then press RATE one or

more times until it turns off.

4. Setup Analyzer for “AUTO-SEARCH” Operation.

A. Locate the controls in the SYNC box of the Analyzer. Verify that the

Analyzer AUTO SEARCH function is ENABLED. The LED in the AUTO SEARCH key

should be ON. If the LED is OFF, press the AUTO SEARCH function one time until

the LED is ON. At this point, verify that the green LOCK LED is ON.

B. Locate the controls in the ERROR DETECTION box of the Analyzer. Zero

all Analyzer error counts by pressing the CLEAR key. Confirm that the number of

errors and the error rate were reset to 0 (note: error rate will start changing as

more and more bits are received. After several minutes of operation, the error

rate should reach 0.0E-9 ⇒ 0.0E-10 ⇒ 0.0E-11 and on).

C. Locate the controls in the ERROR HISTORY box of the Analyzer. Reset all

Analyzer history LEDs by pressing this CLEAR key. Confirm that all ERROR

HISTORY LED’s are turned OFF.

D. Locate the controls in the ERROR INJECT box of the Generator. Verify the

GB1400 Analyzer can detect errors by pressing the Generator ERROR INJECT

SINGLE key several times. Verify that the number of errors count displayed by

the Analyzer increments each time the Generator SINGLE key is pressed.

In effect you are now performing a bit error rate test on the test cables connecting

the gigaBERT1400 Generator and Analyzer. In an actual BER test,

gigaBERT1400 Generator clock and data outputs would be connected to inputs

on a "device under test" (DUT) while gigaBERT1400 Analyzer inputs would be

connected to outputs on the DUT.