JPS6448551A - Transceiver cable test circuit - Google Patents
Transceiver cable test circuitInfo
- Publication number
- JPS6448551A JPS6448551A JP62206035A JP20603587A JPS6448551A JP S6448551 A JPS6448551 A JP S6448551A JP 62206035 A JP62206035 A JP 62206035A JP 20603587 A JP20603587 A JP 20603587A JP S6448551 A JPS6448551 A JP S6448551A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- test pattern
- circuit
- monostable multivibrator
- received
- 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.)
- Granted
Links
Abstract
PURPOSE:To simplify the circuit by discriminating whether a received test pattern is 0 or 1 after a delay time corresponding to duty ratio 1 from the leading edge of a test pattern 1 received by a test signal. CONSTITUTION:A transceiver cable test circuit 1 of 'Ethernet(R)' has a connector 1a and a terminal 1b and a test signal generating means consists of a 20MHz oscillator 2 and a binary counter 3. A logic discrimination means consists of a monostable multivibrator circuit 9 and a D flip-flop 10. When the polarity of the received test pattern is inverted due to mis-connection, the monostable multivibrator 9 is operated with a delay time tau from the leading point of time of the test pattern whose polarity is inverted and generates a pulse restored after 50nS. Thus, the terminal D of the D flip-flop is at H level at a terminal Q of the monostable multivibrator 9, then an error output is produced from the terminal 1b.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206035A JPH0817390B2 (en) | 1987-08-18 | 1987-08-18 | Transceiver cable test circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206035A JPH0817390B2 (en) | 1987-08-18 | 1987-08-18 | Transceiver cable test circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6448551A true JPS6448551A (en) | 1989-02-23 |
JPH0817390B2 JPH0817390B2 (en) | 1996-02-21 |
Family
ID=16516819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62206035A Expired - Lifetime JPH0817390B2 (en) | 1987-08-18 | 1987-08-18 | Transceiver cable test circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0817390B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02305143A (en) * | 1989-05-02 | 1990-12-18 | Kone Elevator Gmbh | Method and equipment for protecting data transmitting circuit network |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4576324B2 (en) * | 2005-11-21 | 2010-11-04 | ルネサスエレクトロニクス株式会社 | Microprocessor |
-
1987
- 1987-08-18 JP JP62206035A patent/JPH0817390B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02305143A (en) * | 1989-05-02 | 1990-12-18 | Kone Elevator Gmbh | Method and equipment for protecting data transmitting circuit network |
Also Published As
Publication number | Publication date |
---|---|
JPH0817390B2 (en) | 1996-02-21 |
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