A combination of a zero-length test load and the transmitter compliance transfer function (TCTF) test load methodology is used for the specification of transmitter characteristics. This methodology specifies the trans- mitter signal at the test points on the required test loads. The transmitter uses the same settings (e.g., pre- emphasis, voltage swing) with both the zero-length test load and the TCTF test load. The signal specifications at IR are met under each of these loading conditions.

The TCTF is the mathematical statement of the transfer function through which the transmitter shall be capable of producing acceptable signals as defined by a receive mask. The transmission magnitude response of the TCTF in dB is given by the following equation for 1.5 Gbps:

21

= –20⋅ log10(e) ⋅ ((6, 5 ⋅ 10–6⋅ f0, 5 ) + (2, 0 ⋅ 10–10⋅ f) + (3, 3 ⋅ 10–20⋅ f2 )) dB

for 50 MHz < f < 1.5 GHz, and:

S21

= –5,437dB

for 1.5 GHz < f < 5.0 GHz,

where:

a) f is the signal frequency in hertz.

The transmission magnitude response of the TCTF in dB is given by the following equation for 3.0 Gbps:

S21

= –20⋅ log10 (e) ⋅ ((6, 5 ⋅ 10–6⋅ f0, 5 ) + (2, 0 ⋅ 10–10⋅ f) + (3, 3 ⋅ 10–20⋅ f2)) dB

for 50 MHz < f < 3.0 GHz, and:

S21

= –10,884dB

for 3.0 GHz < f < 5.0 GHz,

where:

a) f is the signal frequency in hertz.

The TCTF is used to specify the requirements on transmitters that may or may not incorporate pre-emphasis or other forms of compensation. A compliance interconnect is any physical interconnect with loss equal to or greater than that of the TCTF at the above frequencies that also meets the ISI loss requirements shown in fig- ure 24 and figure 25.

Compliance with the TCTF test load requirement is verified by measuring the signal produced by the transmit- ter through a physical compliance interconnect attached to the transmitter.

Compliance with the zero-length test load requirement verified by measurement made across a load equiva- lent to the zero-length load shown in figure 23.

For both test load cases, the transmitter delivers the output voltages and timing listed in table 28 at the desig- nated compliance points. The default mask is IR for intra-cabinet TxRx connections. The eye masks are shown in 9.5.2.1.

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Seagate ST936701SS, ST973401SS manual = -5,437dB
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ST936701SS, ST973401SS specifications

The Seagate ST936701SS and ST973401SS are high-performance enterprise hard drives designed for optimal data storage solutions in demanding environments. Both models belong to Seagate's Savvio series, which is renowned for its reliability and efficiency. These drives are tailored for critical applications such as database management, data warehousing, and online transaction processing.

The ST936701SS comes with a storage capacity of 36.4 GB, while the ST973401SS offers a larger capacity of 73.4 GB. This variance allows users to choose the drive that best suits their storage needs without compromising performance. Both drives utilize a 2.5-inch form factor, making them compact and suitable for high-density storage configurations.

A key feature of these drives is their impressive rotational speed of 10,000 RPM, which enhances data access times and improves overall system responsiveness. This speed allows for reduced latency and faster data transfer rates, critical for applications that require quick retrieval of large datasets.

In terms of technology, these drives utilize the Serial Attached SCSI (SAS) interface, which is favored in enterprise settings for its reliability and speed. SAS provides better performance than traditional SATA drives, particularly when dealing with high workloads, as it supports multiple concurrent connections and higher data throughput.

The ST936701SS and ST973401SS are also equipped with advanced features such as Seagate's Native Command Queuing (NCQ), which optimizes the order in which read and write commands are executed. This results in improved performance under multi-tasking conditions, essential for enterprise servers managing multiple requests simultaneously.

Additionally, both drives incorporate features aimed at enhancing data integrity and reliability. They support End-to-End Data Protection and are designed to endure the rigors of continuous operation, with MTBF (Mean Time Between Failures) ratings that bolster their reputation for durability.

Energy efficiency is another notable characteristic, as both drives are designed to reduce power consumption without sacrificing performance. This is particularly important in enterprise environments where power management contributes to lower operational costs.

In conclusion, the Seagate ST936701SS and ST973401SS drives are robust, reliable storage solutions tailored for enterprise applications. With their high performance, advanced technology features, and capacity options, they provide organizations with the scalability and efficiency required in today’s data-driven landscape. Whether it's for critical data management tasks or high-access applications, these drives stand out as a solid choice for any enterprise storage strategy.
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