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参数资料
| 型号： | MF609A |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | The in-Line Micro filter |
| 中文描述： | 在线微过滤器 |
| 文件页数： | 7/12页 |
| 文件大小： | 120K |
| 代理商： | MF609A |
Product Specification
MF609A
Data sheet subject to change without notice
RDPS-MF038(R0)01/23/2002
SHEET 7 OF 12
4.4. DC characteristic :
All requirement of this specification can be met in the presence of all POTS loop currents
from 0mA to 100mA. This in line filter can pass POTS tip-to-ring dc voltages of 0V to 105V
and ringing signals of 40V to 106Vrms at any frequency from17Hz to 23Hz with a dc
component in the range from 0V to 105V. 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
splitter. The DC resistance from tip-to-ground and from ring-to-ground at the POTS
interface with the U-R interface open shall be greater than or equal to5 Megohms. The
ground point shall be local building or green wire ground. As an objective , the dc resistance
should exceed 10M
.
4.5. Test method :
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 up in figure 3. For measuring POTS band
insertion loss for single filter module also a single filter wit four added parallel load filters.
General Insertion loss equation can be expressed as following. 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. :
Zon defined:
1.0nf
5M ohm
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