CPC5604
Figure 4C Transmit Frequency Response Setup
40mA Loop Current
TIP
V
500
10H
+
Audio
IN1
AP1
Audio
50
LITELINKTM DAA Circuit
Precision
48V
TX+
Precision
System
One
-
Generator
-3dBm/20Hz-4kHz
T/R
600
V
Analyzer
IN2
TX
TX-
OH
RING
500
10H
INSERTION LOSS (dB) = 20 log (V
/ V
)
T/R
TX
Figure 4D Transmit Frequency Response Tx
+3
+2.5
+2
+1.5
+1
+0.5
-0
-0.5
Gain
(dBm)
-1
-1.5
-2
-2.5
-3
-3.5
-4
-4.5
-5
20
50
100
200
500
1K
2K
4K
Frequency (Hz)
XXX
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