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Here's an update on the SVHFS 2025 Conference; Deadline for papers has been extended to March 17 Conference & hotel registration is open; details are in the attached file. Thanks, Robin Midgett

For a new product I'm looking for a number of testers, preferably in Europe The product is tiny and has a high resolution dual time stamping and frequency/phase measurement

5W minus 40dB sounds a bit too much input level for the HP.? ?Not at damage level by any means but above the requirement for a clean result on harmonics etc . .? ? ISTR -30dBm being the typical

It was just a solution to suppress the initial error message during flushing. I am not sure yet why this message was showing in the first place. Maybe not a problem or an indicator of some hidden

Herb thanks for the advice. I'm ordering spares and will replace the switch first Bob E - thanks I'll be getting a DC block for sure Erik thanks I'll will be using a attenuator and DC block from now

The input capacitor is around 1uF SMT. Hard to get these in high voltage. Mind you, I would like to see a slightly higher voltage cap used. But I believe the main problem is the breakdown voltage of

No DC on the input to the counter.? Not sure about input cap, I replaced the AS179-92 LF? and didn't go any further. It worked after switch replacement. Yahoo Mail - Email Simplified On Wed,

Does the counter show any DC on its input, and is the tinySA’s input cap now shorted?

Reggie,?? How were you using it at time of failure???I had mine at what I think is maximum output (-18 dbm) for 45 minutes feeding my scope without a probe and then I tee'd in a 50 ohm input

The tinySA input capacitor support inputs well below 100 kHz. This implies large capacitance in very small form factor which is not available for high voltages with acceptable cost. A separate DC

With a higher voltage coupling cap, isn’t damage still likely due to the voltage spike as it is connected to a >5V source? I’m sure Erik would have used a higher voltage cap if that weren’t the

That is why a DC Block is such an important part of your test kit. It is just a capacitor in series with the centre conductor in an SMA-M to SMA-F adaptor. Make sure it has a DC rating of at least

Assuming your unit was damaged while in the signal generator mode, the LNA was not in the signal path.? Either just the RF switch is faulty, as was the case for Bob, or also the attenuator.? I would

Herb many thanks for your reply Here are the results The SA indicates a level of -75dBm at 30MHz Switching on LNA the signal is gone completely It does look as if the LNA is faulty but not to sure

Interesting..I've not had a look at the close in stuff (yet) See

I just tested my Baofeng BF-F8HP and the Quanseng UV-K6 HTs both at high-power using 40 dB of attenuation into the HP 8568 spectrum analyzer. Transmit frequency for both was 442.275 MHz. Here are the

i had exactly the same problem. Tiny Ultra SA failed in signal generator mode and stopped at selftest 3.? I replaced U22? the single pole double throw switch.?? AS179-92LF? and that cured the

The "'scope" bandwidth is limited by the RBW and VBW filters, set them as wide as possible. Best regards, Don Brant

Tests 3 checks the 30 MHz CAL OUTPUT signal level.? If it is failing, try the following troubleshooting steps: 1.? Connect the CAL OUTPUT (top connector) to the RF INPUT (bottom connector). 2.?

Good day I bought my SA ultra from Zeenko Aliexpress It was fine and passed all tests and calibration then I have only used it as a signal generator and did not upgrade (v1.4 156) While testing a