DIP Switch Channel Matching for Mobile Test Cables
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Solution Overview
Problem
The existing methods for measuring call quality in mobile communication terminals require dedicated connection cables for each terminal model due to varying pin configurations for transmission and reception channels, making it impossible to use the same cables for different terminals.
Innovation Solution
A transmission/reception channel matching apparatus that uses a DIP switch to match additional serial communication channels of mobile communication terminals with the mobile phone test equipment, allowing for channel matching through simple On/Off manipulation and visual monitoring using a display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated connection cables are used for each terminal model to ensure proper transmission and reception channel connection, then connection reliability is improved, but device complexity and inventory requirements increase
Solution Approach 1:
The patent applies universality by designing a single multi-functional connection cable that can adapt to different terminal models through configurable switches. The cable includes transmission and reception channels that can be selectively connected or disconnected based on the terminal type, allowing one cable to serve multiple terminal models that previously required dedicated cables for each model.
Solution Approach 2:
The patent applies dynamics by incorporating switches that allow the connection configuration to be dynamically changed according to the terminal model being tested. The switches enable the cable to transition between different connection states (transmission connected/reception connected/both connected/neither connected) to match the specific requirements of different terminal types.
2Adaptability or versatility
If additional serial communication channels are configured for different terminal manufacturers, then adaptability is improved, but ease of operation deteriorates due to the need for dedicated cables
Solution Approach 1:
The patent applies universality by creating a single cable design that can accommodate multiple terminal manufacturers' configurations. The cable includes option pins and switches that can be configured to match different terminal types (e.g., W1xxx, S3xxx, EvD0-x models from different manufacturers), eliminating the need for separate dedicated cables for each manufacturer's terminals.
Solution Approach 2:
The patent applies self-service by enabling the user to configure the cable themselves using the switches and reference tables, without requiring technical support or specialized knowledge. The configuration process is simplified through clear documentation that guides users to set the switches according to their terminal model, making the system self-configurable.
3Manufacturing precision
If pin configurations are standardized according to Ministry of Information and Communication standards, then manufacturing precision is improved, but adaptability deteriorates for terminals using non-standard pin assignments
Solution Approach 1:
The patent applies the intermediary principle by using switches as a mediating element between the standardized cable pin configuration and the varying terminal pin assignments. The switches act as an intermediate layer that can redirect or bypass standard pin connections to match non-standard terminal configurations, thereby maintaining compatibility with both standardized and non-standardized terminals.
Solution Approach 2:
The patent applies parameter changes by allowing the connection parameters (which pins are connected to which terminals) to be changed based on the terminal model. The switches enable the cable to change its connection parameters dynamically, transitioning from standard pin assignments to non-standard assignments as needed to accommodate different terminal types.
Data Source
AI summary
Disclosed herein is a transmission/reception channel matching apparatus for a mobile communication terminal and a mobile phone test equipment. The transmission/reception channel matching apparatus includes a Printed Circuit Board (PCB), a Dual In-line Package (DIP) switch, and a fastening casing. The PCB includes mobile communication terminal-side terminals to be electrically connected to option pins provided in the serial communication connector of the mobile communication terminal, and transmission and reception terminals corresponding to the transmission and reception channels of the mobile phone test equipment for transmitting a transmission signal to the mobile communication terminal and receiving a reception signal from the mobile communication terminal. The DIP switch is provided with a plurality of switches, is combined with the PCB, and selectively connects the mobile communication terminal-side terminals to the transmission and reception terminals depending on ON/OFF information. The fastening casing accommodates the PCB so that part of the DIP switch is exposed to the outside.