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This is not a good choice for a 10 MHz DA. It was designed long before modern standards, hence being part of the 8500 series. The 8800 or 8900 series are much better choices. The 8504 was designed for

If you have two out of sync 10 MHz signals mixing, low pass filter it, then detect the results If there is only one source, there won't be a low frequency signal to detect. Use that output to tell you

Incidentally (anecdotally?) We still use those amps. Believe it or not, broadcast digital video equipment still mainly uses black-burst for genlocking/referencing the timing on everything in the

The time-nuts have talked endlessly about various 5/10 MHz distribution amplifiers, and the consensus is that the 50/75 ohm mismatch is totally invisible and can be ignored. A bigger problem is

I spent more than 15 years at Wavetek, starting in 1966 so when someone says Function Generator, my image is different, and rather obsolete :) John

The problem is not in the amp. The signal generators are deciding to backfeed their internal ref out onto the cable if either the external ref goes away momentarily or if a power glitch reboots the

PAL VDAs (video distribution amplifiers) are usually good to at least 10MHz, some go as high as 30MHz or even 60MHz. The input impedance is set by the load on the “loop through” input. These use a

Pete_G4GJL <g4gjl.uk@...> updated the album 10MHz LPF ( /g/Test-Equipment-Design-Construction/album?id=278323 ) : Tidies up a pseudo sine or square wave at 10MHz fundamental.

Hi John, Back in the seventies I did some research to develop a custom Q meter at my employer's. It had to cover from 1 KHz to 5 MHz. And yes the transformer injection method was used as in the

Hi John, A nice feature of using a function generator is rather accurate variable output power (voltage). I have no thoughts of using a meter calibrated to Q. My preferred method, yet to be confirmed,

Ok, I see. The measurement is done before the leakage can bother it much. Cool! [email protected]> wrote:

On? Wed, 7 Sep 2022 18:48 david vanhorn <kc6ete@...> asked "How does he deal with the I/O pin leakage, which is typically 1uA max and could be in either direction?"

I am a retired Broadcast TV Engineer The video distribution amplifiers that I use have their -3dB point at 350 MHz. They are plug in trays with eight outputs. There are straight amplifiers, along with

The 1.5V RMS max input voltage of the prototype RF voltmeter is a problem. A 1V RMS, 50 ohm output Z from the generator into a 50:1 turns ratio transformer will produce 0.02V and a 0.02 ohm Z for the

How does he deal with the I/O pin leakage, which is typically 1uA max and could be in either direction? [email protected]> wrote:

The DA is a partial answer in that it would keep one SG from interfering with the others, but I need to have the SG NOT switch back to the internal osc. Any glitch in power long enough to reboot the

Confirm; That’s what I use here. High quality, used very cheeep Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y lester@... 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N

Thanks to all who responded to my question. The thread is 1/4"-28 UNF and I was able to cut it on my lathe so all is now OK. The adaptor works perfectly. Morris

Isolated outputs is desir

Having a quality Function Generator, and easy to make an Injection Transformer Fixture. What I'm missing is a 10 Mohm input Z RF Voltmeter. A prototype RF Voltmeter shown in: