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參數資料
| 型號： | MF614A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | High Speed Digital Services |
| 中文描述： | 高速數字服務 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 139K |
| 代理商： | MF614A |
Product Specification
MF614A
Data sheet subject to change without notice
RDPS-MF041(R0)03/21/2002
SHEET 9 OF 14
4.4. DC characteristics:
All requirement of this specification can be met in the presence of all POTS loop currents
from 0 mA to 100 mA. This In-Line filter can pass POTS tip-to-ring DC voltages of 0 V to
105 V and ringing signals of 40 Vrms to 150 Vrms at any frequencies from 15.3 Hz to 68 Hz
with a DC component in the range from 0 V to 105 V. The DC resistance from tip-to-ring at
the line port interface with the phone interface shorted, shall be less than or equal to 25
ohms for one filter. The DC resistance from tip-to-ground and from ring-to-ground at the
Phone interface with the Line interface open shall be greater than or equal to 10 Megohms.
The ground point shall be local building or green wire ground. As an objective, the DC
resistance should exceed 10 M
.
4.5. Test methods:
4.5.1. On-hook insertion loss:
The insertion loss of a device connected into a given transmission system is defined as the
ratio, expressed in dB, of the load power available ( before and after insertion ) delivered to
the output network beyond the point of insertion at a given frequency. In general, the
insertion loss is defined as the ratio, expressed in dB of the power delivered to a load with
the circuit in place and the power delivered to a load without the circuit in place. The added
insertion loss shall be measured using the test setup in figure 1. For measuring POTS band
insertion loss for single filter module also for single filter with four added parallel load filters.
General Insertion loss equation can be expressed as follows.
Insertion loss = 20 log
V2 / V1
dB where
V1 = the measured voltage value of load without LPF in circuit.
V2 = the measured voltage value of load with LPF in circuit.
The test setup is shown in drawing below.
Figure 1.
Zon definition:
1.0 nF
5 Mohms
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