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CPC5604 Datenblatt(PDF) 25 Page - Clare, Inc.

Teilenummer CPC5604
Bauteilbeschribung  Optical Data Access Arrangement I.C.
PDF  33 Pages
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Hersteller  CLARE [Clare, Inc.]
Direct Link  http://www.clare.com
Logo CLARE - Clare, Inc.

CPC5604 Datenblatt(HTML) 25 Page - Clare, Inc.

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Return Loss
The return loss is a measure of impedance mismatch
between a terminating impedance (DAA) and a source
impedance (reference impedance). The AP measures
the return loss vs. frequency with the addition of the
bridge circuit show in Figure 7A. For this test, the refer-
Figure 7A Return Loss Test Setup
Figure 7B Return Loss
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
-34
-36
-38
-40
-42
-44
-46
-48
-50
500
1K
1.5K
2K
2.5K
3K
3.5K
4K
Frequency (Hz)
RL
(dBm)
+
-
Audio Precision System
One Analyzer
50
A
Audio
Precision
Generator
600
600
V
Z
LITELINK DAA Circuit
TIP
RING
500
10H
500
10H
48V
+
-
40mA Loop Current
0.1% Component tolerances should be used
for accurate measurements
*Note:
TM
X
REF
RL (dB) = 20 log
V X
V
GEN
-A+
+B-
GEN
V
OH
ence impedance is set by the 600
Ω nominal imped-
ance, Z
REF. The impedance that this is to be compared
to is across Tip and Ring connections. The AP sweeps
frequency and graphs frequency vs. return loss as
shown in Figure 7B.



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