The N1093A/B DCA-M optical sampling oscilloscopes are controlled via USB from a PC. The two available models vary in the number of front-panel channel inputs as shown in the following table. The N1093A/B option PLK oscilloscopes can be used with pattern lock. For installation, safety, and regulatory information, refer to the N109X-Series User's Guide which can be downloaded from keysight.com.

• To use an N109X-series oscilloscope

When four N1093Bs are connected to an DCA-X you have a total of 8 optical channels. All eight channels can be displayed at the same time.

The N1093A/B DCA-Ms are controlled using the same FlexDCA user interface that is used to control the DCA-X. As a result, DCA-X users will be very familiar with operating the DCA-Ms as well as using remote control. The DCA-Ms use the high-performance elements of both the DCA-X oscilloscope mainframe acquisition system. The DCA-Ms can be configured to perform optical transmitter compliance tests.

N1093A

Front Panel

Option CDR Front Panel

Option CDR provided clock recovery.

Options CDR/PTB Front Panel

Option PTB provides a precision timebase.

N1093B

Front Panel

Option CDR Front Panel

Option CDR provides clock recovery.

Options CDR/PTB Front Panel

Option PTB provides a precision timebase.

Options

N1093A/B Options

Model/Option Number		Description
N1093A		Single optical channel oscilloscope
N1093B		Dual optical channel oscilloscope
N1093A/B-CDR		Integrated Clock Recovery. 25 to 29 GBd and 53 to 58 GBd
N1093A/B-CRX		Extended Clock Recovery Range. Input rates: 125 MBd to 64 GBd
N1093A/B-LOJ		Low Jitter Timebase
N1093A/B-PLK		Pattern Lock Trigger Capability
N1093A/B-PTB		Integrated Precision Timebase
N1093A/B-FS1		Fast Sampling Rate
N1093A/B-IRC		Impulse Response Correction
N1093A/B-C0C		Certificate of Calibration
N1093A/B-UK6		Commercial calibration certificate with test data
N1093A/B-1CM		Single instrument rack mount kit
N1093A/B-1CN		Dual instrument side-by-side rack mount kit

Key Concepts

• Input signal must meet the following requirements:
• 830 nm to 1600 nm wavelength (multimode or single-mode).
• Symbol rate should be no greater than the selected reference filter. Reference filters are low-pass filters and not bandpass filters. Installed reference filters are listed on the N1092A/B/D's front panel under Filter Rates.
• The Clock In input must meet the following requirements:
• Same symbol rate as the input signal or be a sub-rate clock for proper display of the input signal.
• Triggering occures with any clock between 100 MHz and 32 GHz.
• Trigger setting can be Front Panel or Free Run only.
• Multiple DCA-Ms can be connected to FlexDCA. Delta time values between two channels cannot be compared because each DCA-M (and DCA-X if connected) uses an independent trigger.
• An DCA-X can simultaneously be connected to FlexDCA.
• Simulated waveforms can be displayed on FlexDCA.
• Use FlexDCA's remote programming commands to configure the N1093A/B.

Features

• Increased sampling rate.
• Perform optical transmitter compliance tests at standard symbol rates of 25.78 GBd (TDEC), 20.625 GBd, and 25 to 29 GBaud, depending on the installed filter options.
• Ability to perform eye-mask tests and measure eye diagram parameters including extinction ratio.
• Low-noise, high sensitivity calibrated reference receivers that are compliant to industry standard tolerances. The reference receivers are selected at the time of order and are noted as Filter Rates on the N1092A/B/D's front panel.
• Ability to perform basic oscilloscope mode measurements of pulses rather than eye diagrams (limited to patterns less than 2 ns in duration).

Aligning waveforms

Because a DCA-M’s acquisition system is independent of the DCA-X, the input waveforms may not align after an Auto Scale. This happens if your are using multiple DCA-Ms or a DCA-M with DCA-X receiver modules. To align the waveforms:

• Use Rapid Eye to align the channels. Rapid Eye is available on all N1000A and DCA-M scopes. Turn on Rapid Eye and the waveforms will align during an Auto Scale. Option 500 is the most convenient way to align the waveforms and maintains very fast throughput. Perform these steps:
1. Click Setup > Acquisition to open the Acquisition Setup dialog.
2. Select Enable Rapid Eye.
3. Select Align Channels During Auto Scale.
• Manually delay the channels. If Rapid Eye is not installed as described above, you can manually add software delay to channels. Although this technique works, acquisition throughput will be reduced. For example, if channels 1A, 2A, and 3A are displayed, add software delay to channels 2A and 3A. The delays are referenced to channel 1A because Auto Scale aligns on the lowest numbered channel that is displayed. To add software delay,
1. Click Auto Scale to autoscale the lowest numbered channel.
2. For the remaining channels:
1. Click Setup > Modules > Channels and select the channel.
2. In the Setup dialog, click Advanced for the channel.
3. Click Software Delay and enter the desired delay.

Option IRC

Option IRC provides optical channel System Impulse Response Correction (SIRC) measurement and data files. These files provide an ideal channel response. SIRC data can be applied in the System Impulse Response Correction dialog. The SIRC correction data feature is a digital filter that is used to:

• Improve the response of module reference filters to more closely match an ideal receiver.
• Enable non-standard reference receiver rates or bandwidths.
• Increase the bandwidth of the channel by up to 50%.
• Ensures that an eye diagram will look identical between different modules.

SIRC correction data is unique to a specific module (serial number). Option IRC comes standard with N1030A/B, N1032A/B, and N1040A plug-in modules and does not need to be purchased. You can purchase Option IRC ships for the N1092-series DCA-M modules.

Front-Panel Indicator Lights

Front Panel Indicator Lights

Indicator	Description
	Displays the FlexDCA extended module slot where the N1092A/B/D is installed. The number indicates the channel, which in this picture would be channel 6A.
	Green Trigger light indicates that the N1092A/B/D is being triggered. As with the DCA-X scope, this does not indicate that the trigger signal is synchronous with the channel input signal. The trigger must be set to Front Panel and not Module.
	Red Trigger light indicates that the clock input signal is missing.
	Trigger light off indicates that the N1092A/B/D channel is turned off or if FlexDCA is in single/stop acquisition mode.
	Trigger armed light. This light is red if FlexDCA is in single/stop acquisition mode.
	Channel indicator light. This light is next to the fiber-optic input connector. When on, the light indicates that the associated FlexDCA channel is turned on and that the waveform is displayed. The light is the same color as the displayed waveform. The Trig'd and Armed indicators do not light unless the channel is turned on.

Remote programs previously developed using the N1000A FlexDCA interface can be leveraged directly to control an automated N1092A/B/D system. Measurement results are generally 50% faster with the new N1092A/B/D due to a significantly faster sampling rate.

Front-Panel Fiber-Optic Input

Click here to learn about fiber-optic connector care. Use caution as fiber-optic end surfaces are easily damaged due to improper cleaning techniques and repairs can be expensive.

The front-panel fiber-optic input adapter can be removed and cleaned as shown in the following picture. To remove the fiber-optic adapter:

1. Lift the receptacle latch as shown in the following picture.
2. Carefully pull off the receptacle without touching the ferrule or fiber end.

Calibrations

The following calibrations are available for N1092-series modules within FlexDCA. Each is run from within FlexDCA's Calibration dialog.

Vertical Calibration

A vertical calibration allows you to calibrate the input channel's vertical response. This calibration is performed without an input signal.

• This calibration is located in the N109x tab on the Calibrations dialog.

Dark Level Calibration

Improves the accuracy of extinction ratio measurements by identifying internally generated offset (dark level) signals generated by external optical-to-electrical converters and removing them from the measurement. This calibration is performed without an input signal.

• This calibration is located in the Dark Level tab on the Calibrations dialog.

User Optical Calibration

A user optical calibration of the optical channel at any wavelength between 750 nm to 1650 nm. An external CW optical source is required.

• This calibration is located in the Optical tab on the Calibrations dialog.

Factory Optical Calibration

A factory calibration of the optical channel is performed at 850 nm, 1310 nm and 1550 nm. An external CW optical source is required.

• This calibration is located in the Optical tab on the Calibrations dialog.

Timebase Calibration

N1092-series modules have their own timebase. If multiple N1092-series modules are used or additional timebases are present, calibrations for each timebase will be listed in the Calibrations dialog. The calibration for each N1093A/B is clearly labeled by input channel. Other timebases include the 86107A module, N1060A-PTB, or 86108B-PTD modules.

• This calibration is located in the Timebase tab on the Calibrations dialog

Available Package Licenses

Option	Description
RND	Research and Development Package license
MFG	Manufacturing Package license