Master Your Next Designs Data Sheet Version 1.0 • Emulate a wide range of channel loss with cascadable ISI traces with fine resolution • Real Nelco FR4 PC board material with known S21 • Differential channels compliant ISI channels (PCIe, • Small size The M8048A ISI Channels can be used to emulate channel loss in receiver test setups. A choice of 8 PC board traces with different lengths can be inserted into the signal path. The 8 trace lengths range from 7.7 inch (196 mm) to 34.4 inch (874 mm). By cascading the traces within one box or with the other box a wide range of channels can be emulated with very fine resolution steps. With their small size the ISI channels can be located closely to the device under test. The cascadable ISI channels are complemented by Agilent's compliance channels for SATA, DisplayPort, PCI Express, and HDMI. Agilent Technologies

Emulate channel loss The channel loss between transmitter and receiver is a critical element for the receiver test for all electrical multi gigabit serial interfaces. The channel loss depends primarily on the distance between transmitter and receiver and the electrical medium. The channel loss is typically defined by the S21 parameter in dB for certain frequencies. Some standards define the receiver test to include a certain channel loss in the test setup. M8048A offers a wide range of cascadable channels to emulate certain S21 parameter conditions in a repeatable and accurate way. Emulate intersymbol...

Figure 3: Front panel view of M8048A option 001 (top) and M8041A option 002 (bottom). Trace lengths of Nelco FR 4 Insertion loss Typical values see figure 2 (excludes cables) Insertion loss for M8048A-801 cable Return loss Better than -16 dB at up to 10 GHz typical Better than -12 dB at up to 16 GHz typical see figure 4 Intra-pair skew Input impedance 100 Ω differential, 50 Ω single ended, ± 10% typical Max input voltage levels

Figure 4: Typical return loss (reflection) – example for trace 14.4”. Pattern PRBS 215-1 Data rate Trace length Figure 5: Typical ISI jitter values for all traces at PRBS 215 -1 pattern and selected data rates.

Figure 6: Rear panel view of M8048A-001 (left) and M8028A-002 (right). Table 6. General characteristics Operating temperature Storage temperature Operating humidity 15% to 95% relative humidity at 40ºC (non-condensing) Storage humidity 24% to 90% relative humidity at 65ºC (non-condensing) Physical dimensions (W x H x D) with connectors Bench top (with bumper): Warranty period 1 year return to Agilent Quality management 228 x 59 x 221 mm 9 x 2.3 x 8.7 inch Rack mount (without bumper): 213 x 44.5 x 221 mm 8.4 x 1.8 x 8.7 inch Specification assumptions The specifications in this document describe...

Related Agilent literature J-BERT M8020A High-Performance BERT Data Sheet N4915A-014 PCIe Compliance Channels Data Sheet N4915A-005 DisplayPort ISI Generator Data Sheet N4915-60001 SATA ISI Channel Data Sheet Ordering instructions Each M8048A option includes the following accessories by default: SMA matched cable pair for cascading ISI channels, functional test certificate, and certificate of conformance ISI channel, 4 short traces (7.7” to 12.8“) ISI channel, 4 long traces (14.4” to 34.4”) SMA matched cable pair for cascading channels, 0.4 m, ±5 ps (See figure 7) Recommended accessories: Matched...

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