JPS647737A - Loop back test system for signal converting interface - Google Patents
Loop back test system for signal converting interfaceInfo
- Publication number
- JPS647737A JPS647737A JP62160869A JP16086987A JPS647737A JP S647737 A JPS647737 A JP S647737A JP 62160869 A JP62160869 A JP 62160869A JP 16086987 A JP16086987 A JP 16086987A JP S647737 A JPS647737 A JP S647737A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- test
- signal
- test signal
- common
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Test And Diagnosis Of Digital Computers (AREA)
- Time-Division Multiplex Systems (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
PURPOSE:To eliminate the institution of a test signal receiving and transmitting circuits on all signal converting interface parts by providing a common test signal outgoing circuit and a common test receiving circuit at a loop back test circuit. CONSTITUTION:When a signal converting circuit 12 of a signal converting interface part 2 for the external signal of an attribute A is tested, a common test signal outgoing circuit 14 of the loop back test circuit 1 is excited, a common test signal is generated, and the test signal of the attribute A is generated at a test signal outgoing circuit 6 of the interface part 2. The test signal of the attribute A is communicated to the circuit 12, converted, inverted, folded, and a test result is decided at a test receiving circuit 9, and when the result is normal, a gate circuit 16 is opened. The common test signal sent to a multiple bus 4 is loop-backed at a circuit 16 and returned to a multiple bus 5, only when the test result is normal. The signal is received at a common test receiving circuit 15, and the normally of the circuit 12 is detected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160869A JPS647737A (en) | 1987-06-30 | 1987-06-30 | Loop back test system for signal converting interface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160869A JPS647737A (en) | 1987-06-30 | 1987-06-30 | Loop back test system for signal converting interface |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647737A true JPS647737A (en) | 1989-01-11 |
Family
ID=15724128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62160869A Pending JPS647737A (en) | 1987-06-30 | 1987-06-30 | Loop back test system for signal converting interface |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647737A (en) |
-
1987
- 1987-06-30 JP JP62160869A patent/JPS647737A/en active Pending
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