Clock/Gate Delay Calibration Form

1. Clock/Gate Delay Setup

Clock/Gate Delay

Range: 1 to 100us

Enter this value to set the Clock/Gate Delay manually if the propagation delay characteristics for the device under test are known. Pressing the Set Delay button can also change this value.

2. Clock/Gate/Sweep Setup

If the delay parameter is unknown, the Clock/Gate Sweep Setup menu is used to configure the calibration utility, Once configured, the calibration utility generates a plot of BER versus clock/gate delay. From the plot, the correct clock gate delay setting to realign the signals at the input of the BER analyzer can be determined.

Start

Range: 1 to 100us

Default: 0.000us

Enter this value to set the start of the delay for the Clock/Gate calibration.

End

Range: 1 to 100us

Default: 2.000us

Enter this value to set the end of the delay for the Clock/Gate calibration.

Step Size

Range: 0.01 to 0.5us

Default: 0.1000us

Enter this value to set the incremental step of the delay for the Clock/Gate calibration.

Repeat

Range: 1 to 9

Default: 1

Enter this value to set the repeat times for the Clock/Gate calibration. When this field is set to two or greater, the BER results are plotted on the graph for each iteration of the measurement. By increasing the number of BER test repetitions, it can easily be determined if repeatable results are achievable.

3. BER Analyzer Settings

The signal source internal BER analyzer settings required to perform the clock/gate delay calibration also can be configured remotely using the Signal Studio software. Once configured, initiate the BER test sequence by pressing the button. A plot of BER vs. clock/gate delay will be incrementally filled in as each BER test in the sweep is completed. With no impairments added to the signal, a delay that results in 0 % BER should be achievable.

Total Bits

Range: 100 to 4294967295

Default: 10000

Enter the value to set the total number of data bits to be analyzed at each delay increment.

Clock Polarity

Choice: Positive | Negative

Default: Positive

Select the Clock Polarity

Date Polarity

Choice: Positive | Negative

Default: Positive

Select the Data Polarity

Gate Polarity

Choice: Positive | Negative

Default: Positive

Select the Gate Polarity

Impedance

Choice: TTL | 75ohm

Default: TTL

Select the impedance