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| 型號： | E110 |
| 英文描述： | Test Methods for 10Base-T Modules |
| 中文描述： | 試驗方法10Base - T的模塊 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 56K |
| 代理商： | E110 |
TEST METHODS FOR PULSE
10BASE-T MODULES
Application Note
12220 WORLD TRADE DRIVE, SAN DIEGO, CALIFORNIA 92128 TEL 619-674-8100 FAX 619-674-8262 http://www.pulseeng.com
E110.A (5/97)
Crosstalk
The Crosstalk test measures isolation between the transmit and receive channels. While a signal
is applied to one channel, the network analyzer monitors the other channel. The maximum allow-
able crosstalk is 34.5 dB at 5 MHz and 30 dB at 10 MHz.
To perform the Crosstalk test (see Figure 3):
1. Calibrate the network analyzer in the S21 mode.
2. Short pins 3-5 and 1-6 and do a thru calibration.
3. Measure the crosstalk between the two channels over the range of 5 MHz to 10 MHz.
Figure 3
HP3577
NETWORK
ANALYZER
OR EQUIVALENT
NORTH HILLS 0300BB
OR EQUIVALENT
LPF
XFMR
CMI
XFMR
CMI
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PORT B
50
100
100
50
RDM
RDP
TDP
TDM
TPR+
TPR-
TPX1+
TPX1-
TPX2+
TPX2-
GND
PORT A
100
100
LPF
HP3577A
NETWORK
ANALYZER
OR EQUIVALENT
NORTH HILLS 0300BB
OR EQUIVALENT
LPF
XFMR
CMI
1
2
3
4
5
6
7
14
13
12
11
10
9
8
50
100
RDP
RDM
TDP
TDM
TPR+
TPR-
TPX1+
TPX1-
TPX2+
TPX2-
CT
GND
XFMR
CMI
Figure 2
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