14
CH #4 = 200 mV/div.
TIMEBASE = 2 ns/div
DELTA T = 5.52 ns
START = 23 ns
STOP = 28.92 ns
5439-13
Figure 13. Typical Eye Opening with 25 m of Low Loss 1 mm Plastic Optical Fiber (POF)
Figure 14. Typical Eye Opening with 100 m of 200 µm HCS
TM
Fiber
CH #4 = 200 mV/div.
TIMEBASE = 2 ns/div
DELTA T = 5.56 ns
START = 21.28 ns
STOP = 26.84 ns
5439-14
Applications Support
Variations in performance due to circuit layout can be
avoided by using the artwork shown in Figure 10. Designers
that would like to use the printed circuit layout developed
by Avago are encouraged to embed the PC artwork shown
in this application note into their systems. The PC art shown
here is available from an electronic bulletin board that can
be downloaded. Complete documentation which contains
the artwork, schematic, and parts list for the fiber optic
transceiver shown in Figure 8 is available in the file named
HPRAFTV2.EXE. The artwork, schematic, and parts list for
the test fixture shown in Figure 12 are also available in the
file named 1X9_FXTR.EXE.
System designers can quickly determine if the HFBR-15X7Z
and HFBR-25X6Z will meet their needs by ordering the
HFBR-0527Z. The HFBR-0527Z is a completely assembled
demo board for the transceiver shown in Figure 8. When
using plastic fiber order the HFBR-0527P, and when using
200 µm HCS
TM
fibers specify the HFBR-0527H. The test
fixture in Figure 12 is also available as the HFBR-0319. The
HFBR-0319 is a fully assembled test fixture. This test fix-
ture adapts any fiber optic transceiver with a 1x9 footprint
to test equipment with -5 V ECL inputs and outputs. The
HFBR-0527 and the HFBR-0319 minimize the effort needed
to design new products which use fiber optic data links.
The HFBR-0527 and the HFBR-0319 provide a high level of
technical support. This high level of technical assistance
drastically reduces the time needed to develop and market
new products which utilize the fundamental advantages of
optically isolated data communication.
