Seagate ST600MP0074, Руководство по эксплуатации продукта

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Savvio 15K SAS Product Manual, Rev. B 67
for 50 MHz < f < 1.5 GHz, and:
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:
for 50 MHz < f < 3.0 GHz, and:
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 21 and figure 22.
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 20.
For both test load cases, the transmitter delivers the output voltages and timing listed in table 18 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.
Figure 19 shows the compliance interconnect test load.
Figure 19. Compliance interconnect test load
S
21
20 – log
10
e
( )
6 5
,
10
6 –
f
0 5
,
× × ( )
2 0
,
10
10 –
f
× × ( )
3 3
,
10
20 –
f
2
× × ( )
+ +
( ) ×
dB
×
=
S
21
5 437
,
– dB =
S
21
20 – log
10
e
( )
6 5
,
10
6 –
f
0 5
,
× × ( )
2 0
,
10
10 –
f
× × ( )
3 3
,
10
20 –
f
2
× × ( )
+ +
( ) ×
dB
×
=
S
21
10 884
,
– dB =
Tx+
Tx-
10 nF 50 ohm
50 ohm
Probe
points
SAS internal connector
TCTF
10 nF