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23 Threads found on edaboard.com: Cal Kit
A freshly calibrated HP8753ES Network Analyzer measured a positive S11 on a passive PCB. The blank PCB will be used for an amplifier, and is composed of input and output matching networks. The only mounted components on the board are 0402 capacitors and SMA connectors. What am I missing?
Hi, I am using a cal kit for my vna. After 1 port calibration, 1. marker is at center when loaded 2. marker is at right end with little rotation when open 3. marker is at left end with little rotation when short I can get rid of the rotation if i enter offset using delay 12 ps. What is the cause of this rotation? Is my (...)
Hi, Vector network analyzers need to know the calibration constants of the opens & shorts used in VNA calibration kits. I produce a range of low cost cal kits, and can provide downloaded files for HP and Agilent VNAs e.g. I am able do this since there are a co
Hi, Here are my suggestions to route ethernet signals. I assume the interface speed is 100Mbps: 1. Keep the distance between PHY chip and Ethernet Transformer (magnetics) as short as possible. 2. Route the RX+, RX-, TX+ and TX- differential pairs as 100ohm differential characteristic impedance. You can use Saturn PCB tool kit (a free calculator)
As a followup to my previous thread on calibration think that I can use the two traces on my board to use for THRU and REFLECT standards if I also create a MATCH standard. What are the design requirements for the layout of a MATCH st
I've design an adapter which convert from N-type female to "X" type. N type is 50 Ohm X type desired 75 ohm. But how to measure the impedance of X-type? Thanks, Just calibrate a Network Analyzer with N-Type SOL cal kit, then connect your adapter and terminate it with a 75 Ohm Load on the X Conn. Then M
Just because a cal kit has the right connectors and a suitable frequency range, does not mean the analyer will support it. The analyser needs to have data on the properties of the open and short. Unless HP publish the coefficients, or you measure them some way, you can't just use any cal kit. Dave, for the stuff e
You want to buy a calibration kit in the exact same type of connector that the VNA has. If you try to use adapters, you will get a less accurate cal.
I am buying a HP 8720D (50 MHz to 20 GHz) VNA. I'll send the money tomorrow and should have it in a week or two, as it has to be shipped from the USA to the UK. I have a week to evaluate this, after which the seller wont take it back. Hence I really want to find out if there are any faults within that time frame. The problem is, at this point i
Yes, you'll have to do a manual calibration of the VNA (put the auto cal kit away :) using all your sma and waveguide components, but still let the vna do the math for the adjustment. Get to the manual cal menu, then for the thru measurement, you'll connect your sma cables, coax/waveguide adaptor, and connect both waveguide
I have never done a calibration kit so broadband, but I'd tell you about what I know, for small bandwidth The standards I build, I did them using Momentum. I use 3 standards. Knowing fmax=60GHz, and fmin=10GHz, calculate fo=sqrt(fmax.fmin). calculate a line called dcal wich is lamda/4 (...)
The VNA has a definition of the calibration kit elements, because the short and open are not perfect. High quality cal kits come with documents that describe these small imperfections, and this can be stored to the VNA. Check if there is some offset length is programmed in the cal kit (...)
It is not clear why you don't have any thru (Trl) in your cal kit, but only a line (trL) and a reflect (tRl). If you're thinking to do the thru connecting directly the port1 cable SMA(M) with port2 cable SMA(F), I think you're doing a mistake. In fact the TRL should have the same coax to microstrip transition in all the standards, also in te thru.
I am trying to create a TRL cal kit for a customized substrate. The bandwidth I am interested is from 10 to 60GHz. Anyone can share knowledge on how I can come up with a cal kit for this purpose? How do I decide on the TRL dimensions? Should I avoid frequencies for which the length of the cal (...)
If you did the right calibration just trust Agilent and forget Anritsu.
Read the manual for calibration procedure. When you are about to finish this procedure, system will ask for the file name in new machines or it will ask to replace the existing states with this new state in case of older NWA
Hi to All! I have a Vector Network Analyzer with two SMA cable. The DUT has two GPO or SMP Female connector Female so I have to use SMA2SMP(Male) adapter on both port 1 and 2. I have to de-embend the adaptor so that I measure the S parameters of the DUT only. I have no SMP cal kit (very expensive) only an SMA cal kit. I (...)
The most accurate way to do this would be as follows: 1) Include a 50Ω stripline into your board design to connect the inductor to an sma connector fitted to the board. At 10-20MHz yo don't need to be too accurate with the transitions. 2) Using an SMA lead and cal kit, perform an open, short, load calibration on the analyser. (...)
1. ZVM has R&S cal kit in SMA that uses TRL. This is referrered to this kit. 2. Correct 3. Yes. As standard rule with line you can do one octave of cal range, you can extend it using two properly designed lines. 4. There is a menu where you define the substrate parameters. I don't remember exactly where, but you can do (...)
Hi, i got this error message ( in the logfile) when i try to simulate a project in MWS 5 using a copy of project model from the old version 4. "Parallel symmetry planes! No farfield calculation possible" can somebody explain what i've done wrong. what i did was, i open a project (previously simulated with MWS 4) with MWS 5, save it wi