Below are the questions asked during the live event, along with their respective answers.
Q: What kind of detector of spectrum analyzer has to be used in sniff test?
A: Peak and quasi peak detectors
Q: In the EMI Pre-compliance Testing Check list — are there any other considerations for me to have in mind?
A: Firstly, the distance between the antenna and Device under Test (DUT) — the closer the DUT is to the antenna, this will increase the ratio of the DUT signal strength to RF background noise, and you need to keep this in mind. Also, keep in mind that near field results do not translate directly into the far field tests used in EMI compliance testing, so just be careful about drawing conclusion.
Q: For WiFi Standard testing, when performing transmit and receive tests, what factors should I consider outside of the Wireless module itself?
A: Your power source – there are times where you may have power up, or power regulation issues – which impact your wireless module, but not be your wireless module itself. Also, review your clock performance – particularly in more consumer applications that may use more basic crystals- there may be more clock signal radiations may effect your WiFi output. Lastly, review your antenna layout and performance- particularly insuring of impedance matching – this is especially true when you have Multiple-in/Multiple-out (or MIMO) antennas and related applications
Q: You speak of MDO scopes with its 6 in 1 features for debug, what does your scope do that others do not?
A: I would emphasize (again) the real synch synchronization of RF and Time domain – that Only our MDO series scopes enables. You are able to analyze your signals more quickly, and accurately for the design work, or trouble shooting which you are doing. Also, probing accuracy is unmatched. Tektronix has makes this important aspect easy, quick and reliable. Tek VPI interface automatically set up communications between probes and the scope, and insure reliability and repeatability in measurement.
Q: Regarding your new scope, you mention Flex Channels, can you explain how this works?
A: With the release of this scope we’re excited to introduce a new input technology called FlexChannels. This unique feature- of FlexChannel input – can be used as one analog input channel or 8 digital probe channels. This provides a variety of flexible combinations. For instance up to 8 analog channels, or up to 64 digital channels is possible. Other combinations like 4 analog channels and 32 digital probes or 6 analog channels and 16 digital channels are also possible.
Additionally the sample rate and record length stay constant between inputs. So each FlexChannel, configured as either analog or digital will benefit from the 6.25 Giga-Sample per second and 125 mega-points of optional memory, making it easier to correlate your complete system.