drkirkby
Full Member level 6
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 in time, I don't have a cal kit, though I intend buying a 85052B 3.5 mm cal kit as soon as I can get one at a sensible price in good condition.I may or may not get one before the analyzer arrives. The analyzer might be here before I get a cal kit, in which case I'm in trouble.
So my question is, would it be possible to do a quick and dirty cal of the 8720D without have a proper cal kit? On some analyzers, this would be quite easy, as all one needs is an open, short and load. At low frequencies, it should be possible to make a reasonable open and short. But I don't know if an attempt to do that on an 8720D will work, even at 50 MHz, as the cal kit has an offset open, offset short and sliding loads. I can't easily make something which slides if that is really needed.
I have an SMA load that is good to 18 GHz, so that bit is easy, but getting a sliding load is not.
Dave
The problem is, at this point in time, I don't have a cal kit, though I intend buying a 85052B 3.5 mm cal kit as soon as I can get one at a sensible price in good condition.I may or may not get one before the analyzer arrives. The analyzer might be here before I get a cal kit, in which case I'm in trouble.
So my question is, would it be possible to do a quick and dirty cal of the 8720D without have a proper cal kit? On some analyzers, this would be quite easy, as all one needs is an open, short and load. At low frequencies, it should be possible to make a reasonable open and short. But I don't know if an attempt to do that on an 8720D will work, even at 50 MHz, as the cal kit has an offset open, offset short and sliding loads. I can't easily make something which slides if that is really needed.
I have an SMA load that is good to 18 GHz, so that bit is easy, but getting a sliding load is not.
Dave