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參數(shù)資料
| 型號： | XRT5897 |
| 廠商： | Exar Corporation |
| 英文描述： | Seven-Channel E1 Line Interface (3.3V or 5.0V)(七通道E1 3.3V線接口單元) |
| 中文描述： | 七通道E1線路接口（3.3V或5.0V），（七通道素E1 3.3線接口單元） |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 959K |
| 代理商： | XRT5897 |
XRT5897
15
Rev. 1.10
Transmitter Output Return Loss Measurements
The following measurements were made with a Wandel
andGoltermannSNA--2NetworkAnalyzerequippedwith
an RFZ--1 75
Return Loss Bridge.
impedance matching transformer was used to make the
120
measurement. A network analyzer calibration run
subtracted out the effects of this transformer.
Test Conditions:
D
Output transformer ratio was 1:2.
D
Transmitter series resistors (R3 and R4 in
Figure 1
)
were 9.1
.
D
Device was powered from a 3.3V source, transmitter
was enabled, and no output data was present.
A 75
to 120
This configuration was used for both 75
and 120
measurements. The only change was the termination
resistance provided by the return loss bridge.
Test Results:
Table 5
compares measured output return loss with
requirements in ETSI FINAL DRAFT prETS 300 166,
June1993. Theseresultsshowthatmeasuredreturnloss
is mainly determined by the characteristics of the output
transformer. This isparticularlyevidentforthe 120
load
where the measured result is better than the calculated
value.
Specified
Frequency
0.025 fb
0.05 fb
1.5 fb
Frequency
(KHz)
51.2
102.4
3072
ETSI Spec.
(Min. dB)
6
8
8
Meas. Value (dB)
75
Load
22.6
22.6
18.0
Meas. Value (dB)
120
Load
15.4
15.7
14.6
Table 5. Transmitter Output Return Loss Measurements
Notes:
fb = 2048KHz
This data shows that the XRT5897 is fully compliant with the ETSI Output Return Loss Specification for E1 operation with either
75
or 120
loads.
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| XRT5897ES | 功能描述:外圍驅(qū)動器與原件 - PCI 7 CH E1 AFE RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
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