COMMUNICATION SYSTEM AND TEST APPARATUS

• US 20130266044A1
• Filed: 04/18/2013
• Published: 10/10/2013
• Est. Priority Date: 11/29/2010
• Status: Abandoned Application

• Current Assignee: Advantest Corporation
• Original Assignee: Advantest Corporation
• Inventors: TAMURA, Kazumoto
• Application Number:
  US13/865,213
• Publication Number:
  US 20130266044A1
• Time in Patent Office: Days
• US Class Current: 375/211
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 47/26 using explicit feedback to the source, e.g. choke packets
• CPC Class Codes: H04L 7/00 Arrangements for synchronising receiver with transmitter synchronisation of generators of electric oscillations or pulses H03L7/00

Abstract

To lower the cost of an apparatus. A test apparatus including a first communication device and a second communication device is provided. The first communication device includes a first transmitting unit that transmits, to the second communication device, a signal including a control code of a code value corresponding to a transmission rate to be used in communication between the first communication device and the second communication device when the communication is not established therebetween, and the second communication device includes: a first receiving unit that receives a signal from the first communication device; and a specifying unit that specifies the transmission rate corresponding to the control code included in the signal transmitted from the first communication device when the communication is not established between the first communication device and the second communication device.

Claims

1. A test apparatus that tests a device under test, the test apparatus comprising:

a test unit that tests the device under test by exchanging a signal with the device under test;

a control device that controls the test unit; and

a relay device that relays communication between the test unit and the control device;

wherein

the test unit has a first communication device,

the control device has a second communication device corresponding to the test unit,

the first communication device includes a first transmitting unit that transmits, to the second communication device, a signal including a control code of a code value corresponding to a transmission rate to be used in communication between the first communication device and the second communication device when the communication is not established therebetween, and

the second communication device includes;

a first receiving unit that receives a signal from the first communication device; and

a specifying unit that specifies the transmission rate corresponding to the control code included in the signal transmitted from the first communication device when the communication is not established between the first communication device and the second communication device.

2. The test apparatus according to claim 1, wherein

the second communication device includes a clock regenerating unit that regenerates a clock from the signal transmitted from the first communication device, and

the first receiving unit receives the signal from the first transmitting unit based on the clock.

3. The test apparatus according to claim 1, wherein

the specifying unit includes:

a determining unit that determines whether the signal transmitted from the first communication device includes a specified control code; and

a setting unit that sequentially performs setting of the determining unit to detect each of a plurality of control codes corresponding to a plurality of the transmission rate, and

the setting unit specifies the transmission rate corresponding to a control code upon detection of the control code that is set for the determining unit.

4. The test apparatus according to claim 3, wherein the determining unit aligns the signal transmitted from the first communication device with the specified control code, and determines that the specified control code is included in the signal that is received, under a condition that alignment is performed successfully.

5. The test apparatus according to claim 3, wherein, at every predetermined interval, the setting unit switches a control code to be detected by the determining unit.

6. The test apparatus according to claim 1, wherein the second communication device further includes a second transmitting unit that transmits a signal to the first communication device at the transmission rate specified by the specifying unit.

7. The test apparatus according to claim 1, wherein

a transmission rate of a signal to be transmitted and received by the first communication device is fixed, and

a transmission rate of a signal to be transmitted and received by the second communication device is variable.

8. A test apparatus that tests a device under test, the test apparatus comprising:

a test unit that tests the device under test by exchanging a signal with the device under test;

a control device that controls the test unit; and

a relay device that relays communication between the test unit and the control device;

wherein

the test unit has a first communication device,

the control device has a second communication device corresponding to the test unit,

the first communication device includes a first transmitting unit that transmits, to the second communication device, a signal including a control code of a code value corresponding to a transmission protocol to be used in communication between the first communication device and the second communication device when the communication is not established therebetween, and

the second communication device includes;

a first receiving unit that receives a signal from the first communication device; and

a specifying unit that specifies the transmission protocol corresponding to the control code included in the signal transmitted from the first communication device when the communication is not established between the first communication device and the second communication device.

9. The test apparatus according to claim 8, wherein

the second communication device includes a clock regenerating unit that regenerates a clock from the signal transmitted from the first communication device, and

the first receiving unit receives the signal from the first transmitting unit based on the clock.

10. The test apparatus according to claim 8, wherein the specifying unit includes:

a determining unit that determines whether the signal transmitted from the first communication device includes a specified control code; and

a setting unit that sequentially performs setting of the determining unit to detect each of a plurality of control codes corresponding to a plurality of the transmission protocol, and

the setting unit specifies the transmission protocol corresponding to a control code upon detection of the control code that is set for the determining unit.

11. The test apparatus according to claim 10, wherein the determining unit aligns the signal transmitted from the first communication device with the specified control code, and determines that the specified control code is included in the signal that is received, under a condition that alignment is performed successfully.

12. The test apparatus according to claim 10, wherein, at every predetermined interval, the setting unit switches a control code to be detected by the determining unit.

13. The test apparatus according to claim 8, wherein the second communication device further includes a second transmitting unit that transmits a signal to the first communication device with the transmission protocol specified by the specifying unit.

14. The test apparatus according to claim 8, wherein

a transmission protocol of a signal to be transmitted and received by the first communication device is fixed, and

a transmission protocol of a signal to be transmitted and received by the second communication device is variable.

15. A test apparatus that tests a device under test, the test apparatus comprising:

a test unit that tests the device under test by exchanging a signal with the device under test;

a control device that controls the test unit; and

a relay device that relays communication between the test unit and the control device;

wherein

the test unit has a first communication device,

the control device has a second communication device corresponding to the test unit,

the first communication device includes a first transmitting unit that transmits, to the second communication device, a signal including a control code of a code value corresponding to a transmission rate and a transmission protocol to be used in communication between the first communication device and the second communication device when the communication is not established therebetween, and

the second communication device includes;

a first receiving unit that receives a signal from the first communication device; and

a specifying unit that specifies the transmission rate and the transmission protocol corresponding to the control code included in the signal transmitted from the first communication device when the communication is not established between the first communication device and the second communication device.