Electronics/LA3200: Difference between revisions
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== The Basics == | == The Basics == | ||
A logic analyser (analyzer) is used to probe digital signals in an electronic circuit. One example would be the input/output pins on a microprocessor such as an Arduino. The signals are displayed on a screen in the form of a timing diagram so that they can be compared against each other or against a timing reference. | A logic analyser (analyzer) is used to probe digital signals in an electronic circuit. One example would be the digital input/output pins on a microprocessor such as an Arduino. The signals are displayed on a screen in the form of a timing diagram so that they can be compared against each other or against a timing reference. | ||
The logic analyser uses an external POD and cables to attach to the digital circuit. Different PODs are available for different functions. The POD we have is not an original part it was generated from the service manual. | |||
== Documentation == | == Documentation == | ||
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'''Combination data pod AP01''' | '''Combination data pod AP01''' | ||
* | |||
This is an assumed specification: | |||
* Obtained from ebay user robhookham on ebay | |||
* 32 data inputs (DC to 25MHz) | |||
* No 100MHz or glitch capture capability | |||
* No location for the disassembler ROM, this would need extra circuitry (TBD) | |||
* 3 clock inputs | * 3 clock inputs | ||
* 3 clock qualifier inputs | * 3 clock qualifier inputs | ||
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* Threshold TTL (1.4V) | * Threshold TTL (1.4V) | ||
* Single 40-way connector with colour coded plug-on connection leads | * Single 40-way connector with colour coded plug-on connection leads | ||
* The POD board's Eagle CAD files are available | |||
== Calibration == | == Calibration == | ||
Revision as of 18:51, 14 August 2016
| 32 channel | |
| Equipment Information | |
|---|---|
| Status | Unknown |
| Manufacturer | Thurlby Thandar Instruments |
| Model | LA3200 |
| Hackspace Information | |
| Induction Required | Yes |
| Induction Information | Here |
| Card RFID Enabled | No |
| Owner | Hackspace |
The Basics
A logic analyser (analyzer) is used to probe digital signals in an electronic circuit. One example would be the digital input/output pins on a microprocessor such as an Arduino. The signals are displayed on a screen in the form of a timing diagram so that they can be compared against each other or against a timing reference.
The logic analyser uses an external POD and cables to attach to the digital circuit. Different PODs are available for different functions. The POD we have is not an original part it was generated from the service manual.
Documentation
Manuals can be found here just search for LA3200.
According to this thread the pinout for the RS423 serial port on the back is:
2 - 3 3 - 2 4 * 5 - 5 6 * 7 - 8 8 - 7 (-) = link to (*) = short together at pc end
The device is apparently identical to a Hitachi VC3120.
Pod photos and even a PCB design for replacement pods can be found here.
Specification
Logic Analyser
- 32 channels (LA3200)
- 25MHz synchronous operation on all channels
- 100MHz asynchronous operation (8 or 12 channels)
- 5ns glitch capture capability
- Multi-level trigger sequencing
- Non-volatile data and set-up memories
- Disassembler options for popular uPs with specific PODs
- POD AP01 for 32 channels
- Manual: TBD
- Owner: TBD
Combination data pod AP01
This is an assumed specification:
- Obtained from ebay user robhookham on ebay
- 32 data inputs (DC to 25MHz)
- No 100MHz or glitch capture capability
- No location for the disassembler ROM, this would need extra circuitry (TBD)
- 3 clock inputs
- 3 clock qualifier inputs
- Input impedance 100k/5pF
- Threshold TTL (1.4V)
- Single 40-way connector with colour coded plug-on connection leads
- The POD board's Eagle CAD files are available
Calibration
Not required
Induction
Ask on the mailing list for volunteers to demonstrate the use of any of the test equipment.
Safety
You must read the safety documentation in this link before using this equipment.