Tektronix 071-0590-00 user manual Error Inject Input, Procedure to Control Error Injection Mode

Reference

Procedure to Control Error Injection Mode

1.Press the RATE key one or more times to select the desired error injection mode. Note that the LED in the RATE key will turn on except when mode is set to ERR OFF. Available selections are:

ERR OFF: Single error injection.

ERR 1E-7: Generate errors at rate of 10-7.

ERR 1E-6: Generate errors at rate of 10-6.

ERR 1E-5: Generate errors at rate of 10-5.

ERR 1E-4: Generate errors at rate of 10-4.

ERR 1E-3: Generate errors at rate of 10-3.

ERR EXT: External error inject mode.

2.Once you have selected an internal error rate, or the external mode, you can turn this error rate off and on by alternately pressing the SINGLE key and RATE key. Do not press the RATE key two or more times in a row unless you want to change the current error injection mode. However, while the current error rate is off, you can press the SINGLE key as many times as you wish to inject single errors.

3.To return to the single injection mode, press RATE one or more times until ERR OFF is selected.

ERROR INJECT Input

The ERROR INJECT input is an SMA (female) connector located on the rear- panel of the Generator. When the error injection mode is set to ERR EXT, one bit error will be generated for each rising edge in the signal applied to this input.

Setup - The ERROR INJECT is a 50 Ohm, ECL input. No hardware setup is required.

Data Inhibit - The DATA INHIBIT input is located on the rear-panel of the Analyzer. A signal applied to this input may be used to gate off and on the Generator DATA output signal. The logic of the DATA INHIBIT function is shown in the following table. The DATA INHIBIT function is not bit or frame synchronized with the DATA output signal. Therefore, the gating action caused by the DATA INHIBIT input may occur anywhere within a DATA output bit time slot and anywhere within a pattern frame. DATA INHIBIT is a standard 50 Ohm ECL input and does not require any threshold or delay setup.

Table 3-3. Data Inhibit Logic

Logic Level Applied to	Action
DATA INHIBIT INPUT
OPEN or LOW	DATA output operates normally.
HIGH	DATA output is disabled, that is forced LOW.

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