The LMH1239 output eye performance was measured
with the test setup shown in Figure 7-12.
The eye diagrams measured on the LMH1239EVM in
this subsection show the LMH1239 100Ω differential PCB output at OUT0± and OUT1± (Figure 7-14 - Figure 7-17).
Additionally, LMH1239 BER (bit error rate)
performance was measured with the test setup shown in Figure 7-13. Phabrix Qx BER results on the LMH1239EVM are shown in Figure 7-18 and Figure 7-19.
IN_MUX_SEL = F, VOD_DE
= F, SDI_OUT_SEL = H, OUT_CTRL = F
Figure 7-14 OUT0± at 11.88
Gbps (12G-SDI), CC = 100m Belden 1694A at SDI_IN+, ReclockedIN_MUX_SEL = F, VOD_DE = F, SDI_OUT_SEL = H,
OUT_CTRL = F
Figure 7-16 OUT1± at 11.88
Gbps (12G-SDI), CC = 100m Belden 1694A at SDI_IN+, ReclockedIN_MUX_SEL = F (SDI_IN selected), VOD_DE =
F, SDI_OUT_SEL = H, OUT_CTRL = F
Figure 7-18 OUT0± BER at
11.88Gbps (12G-SDI), CC = 100m Belden 1694A, ReclockedIN_MUX_SEL = L, VOD_DE = F, SDI_OUT_SEL = H,
OUT_CTRL = F
Figure 7-15 OUT0± at 11.88
Gbps (12G-SDI), CC = 100m Belden 1694A at SDI_IN1+, ReclockedIN_MUX_SEL = L, VOD_DE = F, SDI_OUT_SEL = H,
OUT_CTRL = F
Figure 7-17 OUT1± at 11.88
Gbps (12G-SDI), CC = 100m Belden 1694A at SDI_IN1+, ReclockedIN_MUX_SEL = L (SDI_IN1 selected), VOD_DE =
F, SDI_OUT_SEL = H, OUT_CTRL = F
Figure 7-19 OUT0± BER at
11.88Gbps (12G-SDI), CC = 100m Belden 1694A, Reclocked