Test WLAN (Wireless Connectiviry)

Maybe someone use the wireless (WLAN/BT test). It has link to she - http://www.ni.com/rf/test/.

Idon't understand one thing. The test function as "access point" during a test of DUT?

For example, CMW500 (R & S), MT8860C (Anritsu) work as 'access' point in a trial of DUT.

Alternatively, NI test may some other test modes HAD?

Concerning

Ruslan.

Ruslan63,

Short answer:

The NI WLAN toolkit does not act as an access point.  It offers measurement analysis and generation of waveform in accordance with IEEE 802.11 a/b/g/n/j/p/ac/ah/af. You should be able to put your device in test mode and have transmitting packets or packets of report he received successfully.

Longer answer (drawing of some notes I made):

Two main methods of testing are signaling or signaling reduced and non-signalisation.  NEITHER supports non-signalisation. There are pros & cons of each.  Here is a quick table showing some differences.


































  Signalling Non-Signalisation
Test speed slow (mins) fast (dry)
Cost test instrument high low
Development time low high
Sw/test protocol stack Yes NO.
Required unit test mode NO. Yes

If you test the stack of protocol/software of your device, or if you have no way to control your device in test mode, you should use signs and cannot benefit from the advantages of signalling No.

Today, the trend is to use no signage for regression tests during the validation and design of the product and production test. Developers buy the modules and chipsets including sellers have already validated the software stack and Protocol.  As long the developer not to waste the chip/module, risk of product failure is very low. Thus, as designers to put the chip/modules in a circuit, they use no signs of regression tests to quickly validate the functionality of RF (that is, the physical layer RF) of the chip/module has not been compromised. A subset of this very fast, parametric test can often be used for production testing. Yet once, as long as the production process is not spoil the chip/module, so the risk of failure is low.

WLAN Wireless products, were among the first to use the test of no signage.  Almost all WLAN vendors have a driver to control the device in test mode. The general categories of control are similar (e.g. Tx N packets of data type given the power), but orders are not normalized between suppliers. The interface for the control of test device mode varies also (UART, USB, SDIO).

Bluetooth has a standard interface based on the COM port and the command set is the same between vendors (NICE!). For this reason, NEITHER has been able to create libraries of control device as part of its suite of tests of Bluetooth.

Control of the cellular device varies such as WLAN, and shifted in no signal test, they are now driving difficult due to high volumes and $$$. In addition, a test of cell signalling can take 2 to 3 minutes vs 10-20 sec.  And if the call "injects" you don't have many options other than to rerun the test.  And the cost of test equipment can be > x 5.

Navigation receivers can acquire a signal satellites simulated (for example using NI GPS Toolkit) and quickly provide support noise measurement on N satellite signals detected.  While this isn't really non-signalisation, it represents the time savings based on the same approach necessary to lock onto satellite signals 'good' protocol/software stack has already been validated and the risk is low.  Waiting for a satellite lock may take minutes, which for many is unacceptable, especially in production tests.

As the cost of the chips drop, functionality increases, the cost of the test becomes a greater % of product. Businesses now demand not signalling test improved support to control costs.  In my opinion, any provider module/chip that don't offer not supported no signaling tests will lose market share.  This should be the first question a request before company decided on a module/chip provider because the test costs can sometimes outweigh the cost of the chip!

I worked with a variety of businesses

(A) who have more expensive 0 - 2 signalling testers for design/validation, while having much more (x 10) testers no signage for the production test and regression tests.

(B) who produce high mix low volume products where they have that 1-2 testers signage for all tests.  In their case the advantage of not having to spend time developing the device control code is the largest economies, and their time to test/debit is not important.

(C) who have no way to control test (for example the sealed device) device of fashion and have only the option of test signals.

NEITHER focuses on the company to a types.

I hope this clarify things.

Tags: NI Products

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