Sampling Oscilloscope
DCA1065
65GHz Sampling Oscilloscope DCA1065
Features
Efficient Measurement
Supports up to 4 channels of 112 GBaud PAM4 signal eye diagram testing
Multiple Measurement Functions
Meets PAM4 eye diagram test requirements
Automatic Test
Remote command control mode enables fast and convenient operation
Ensure Accurate Performance
High performance ensures test consistencyFunctions and Advantages
Integrated Multi-port Design
Compact size (Half rack width) to save space.
TDECQ (Transmitter and Dispersion Eye Closure Quaternary) Test
The TDECQ measurement is based on two vertical histograms on the eye diagram. Ideally, these histograms are centered at 0.45 UI and 0.55 UI, maintaining a 0.1 UI separation between them. Each histogram window has a width of 0.04 UI and covers all modulation levels of the eye diagram. The minimum TDECQ value is obtained by precisely adjusting the timing position of the histogram pair.The figure illustrates the TDECQ measurement window.
OMA Test
OMA (Outer Optical Modulation Amplitude) refers to the difference between the optical power levels P₃ and P₀, measured at the center of two UIs in a specified test pattern which with 7 consecutive "3"s and 6 consecutive "0"s. The relationship is:As shown in the figure, P₀ and P₃ represent the power levels in the definition of Outer OMA/ER.
Actual Test of 106GBd PAM4 Signal
Screenshot of the SSPRQ eye diagram waveform of the 106 GBaud PAM4 signal measured by DCA1065.
|
Item |
Specification |
|
Optical Bandwidth [1] |
65 GHz |
|
Fiber Input |
9/125μm FC/UPC Single-mode |
|
Wavelength Range |
1250 ~ 1600 nm |
|
Factory Calibrated Wavelength [2] |
1310/1550 nm ±10 nm |
|
Supports Various Data Rate According to Multi Standards （Filters） |
106.25/112 GBaud PAM4 53.125/56 GBaud PAM4 |
|
ADC Resolution |
14 Bit |
|
Measurement Consistency [3] |
Average Power: ±0.1 dB Extinction Ratio: ±0.3 dB TDECQ(PAM4): ±0.5 dB |
|
Max Input [4] (Non-Destruction, Peak) |
+5 dBm |
|
Sensitivity and Linear Range [5][6] |
PAM4: 0 ~ -5 dBm |
|
Monitor Average Power Range |
-35 dBm ~ +1 dBm |
|
Average Power Monitor Accuracy |
Single-mode ±5% ±200 nW ±connector uncertainty |
|
Input Return Loss (FC/UPC) |
＞30 dB@1310nm |
[1]Optical channel bandwidth define by optical power reduced by 3dB which is -3dBo bandwidth（-3dBo=-6dBe）
[2]Here the ±10 nm is the source optical wave length error
[3]This parameter is not used to describe instrument specification. It means the difference between test with ideal signal and the theoretical value. In real test scenario, the test consistency related to signal quality
[4]This value is from damage test by increasing the input optical power step by step (0.1dBm step). In real applications, due to the instability of the optical source, please be aware that not to keep the input optical signal power at+7dBm or above. It may cause the instruments performance reduction or even damage
[5] Sensitivity is not a part of instrument specifications. It is calculated from characteristic value of noise. It means the power value when influenced only by oscilloscope‘s noise floor, test with ideal eye diagram mask and the mask margin to be close to 0%. The minimal power value is also related to the quality of signal under test in real scenario
[6]It has difference with different signal（NRZ/PAM4, single-mode/multi-mode）
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