Specifications

5.5 Useful code snippets for programming the N4965A-CTR multi-channel BERT controller

Once you’ve referenced the IVI driver in your Visual Studio project, assigned a using command

simplify the object namespace, initialized the driver object, and connected to an instrument, now what?

To turn on the TG5P1A generator pod attached to Channel 1 of the N4965A-CTR multi-channel BERT controller

instrument, set the amplitude of the output to 1.0V, change the pattern to PRBS15, and set 2.5dB of de-emphasis:

IAgilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERChannelGenerator gen =

pcbDriver.Channels.get_Item(“1”).Generator;

gen.State = Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERStateEnum.

Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERStateOn;

gen.Output.Amplitude = 1.0;

gen.Pattern.Name = Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT

CONTROLLERGeneratorPatternEnum.

Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT

CONTROLLERGeneratorPatternPRBS15;

gen.Output.Deemphasis = 2.5;

To turn on the N4965A-200 12.5 Gb/s error detector remote head attached to Channel 2 of the N4965A-CTR

multi-channel BERT controller instrument, and set the pattern to PRBS15:

IAgilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERChannelDetector det =

pcbDriver.Channels.get_Item(“2”).Detector;

det.State = Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERStateEnum.

Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERStateOn;

det.Pattern.Name = Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT

CONTROLLERDetectorPatternEnum.

Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT

CONTROLLERDetectorPatternPRBS15;

To perform a clock/data alignment on the N4965A-200 12.5 Gb/s error detector remote head, to align the

sampling point with the most open portion of the eye, and to start a 10 second measurement:

det.Eye.AutoAlign();

det.Gate.Period = 10;

det.Gate.State = Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERStateEnum.

Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT CONTROLLERStateOn;

To capture the number of bits, number of errors, BER, and elapsed time calculated while the measurement is running:

double[] fetchAllAry = new double[4];

double numBits, numErrors, BER, ElapsedTime;

{

// get the new gated results

det.Fetch.All(ref fetchAllAry);

numBits = fetchAllAry[0];

numErrors = fetchAllAry[1];

BER = fetchAllAry[2];

ElapsedTime = fetchAllAry[3];

}

while (det.Gate.State == Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT

CONTROLLERStateEnum.Agilent TechnologiesN4965A-CTR MULTI-CHANNEL BERT

CONTROLLERStateOn);

Other examples are available. Please contact Agilent Technologies for more information.