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PC software with "CW" function SOLVED with avvidclif's freq command !
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After the "0" span solution, i tried the "ch>? freq 50000000" command and bingo ! i get a 50 MHz CW frequency !
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Many tnx, Rudi Le 02.06.2020 ¨¤ 01:43, avvidclif a ¨¦crit?:
When I checked the accuracy of the internal ref I just put in center freq and nothing else and it came up at what I put in, no sweeo. |
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Dear Rudi,
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you started the "PC software with" CW "function" topic. Shouldn¡¯t other similar, related information be written in the same topic? Slowly there will be 14,000 entries in this group, I think this is a record! Don't break up what you have to say, please. Thank you for your attention 73, Gyula HA3HZ PC software with "CW" function SOLVED with avvidclif's freq command ! --
*** nothing is permanent only change ( ) *** |
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Dear OM Gyula,
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For antennas measurements including feeders, filters, etc,? i'm using my NanoVNA-H connected to nanovna-saver in the shack. For direct antenna measurement, i'm using the VNA in "mobile" mode, tnx to the internal battery. As i'm not equipped with a RF generator and after measuring the RF output of the NanoVNA, (not too bad hi !) i thought to use it as a RF generator. I split the output (Mini-Circuits device 2 ways splitter)? in 2 outputs; one is used as the RF signal source (~-3dB loss) and the second output go to a frequency meter, with a G3RUH GPSDO as reference. As a "CW" command is not available in nanovna-saver, i used the "CW" function, entering directly the desired frequency "manually" into the nanovna. I asked via the group, if an other solution was possible and i received answers with 2 possibilities: -1- Using a null span sweep centered on the desired frequency and -2- Sending, with PuTTY free software, the " ch> freq {frequency value in Hz} to the same COM port after shutting down the nanovna-saver software. This is all the "story" and without the help found in the group, i would be still obliged to enter the frequency using the "CW" function described in the NanoVNA-H user Menu Structure paper furnished with the VNA. With my best 73, Rudi, HB9ARI Le 02.06.2020 ¨¤ 10:56, Gyula Molnar a ¨¦crit?:
Dear Rudi, |
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On Tue, Jun 2, 2020 at 09:06 AM, Rudolf Schaffer wrote:
i thought to use it as a RF generator. I split the output (Mini-Circuits device 2 ways splitter) in 2 outputs; one is used as the RF signal source (~-3dB loss) and the second output go to a frequency meter, with a G3RUH GPSDO as reference. As a "CW" command is not available in nanovna-saver, i used the "CW" function, entering directly the desired frequency "manually" into the nanovna. ======================================== Rudi, That set up will work O.K. below 300 MHz where only fundamentals are used, but at 300 MHz and above, where harmonics are used, you may need a 300 MHz high pass filter. At 300 MHz the fundamental at 100 MHz is 15 dB higher on my NanoVNA. - Herb |
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Rudi,
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I don't understand the problem you are having with your nanovna-H. I have a current version of firmware on my nanovna and under the stimulus menu, there is "CW FREQ" The nanovna generates a constant output frequency - even if you press the "PAUSE SWEEP" button. As an RF generator, you will need to contend with all the harmonics as the Nano outputs a squarewave. regards,Larry On Tuesday, June 2, 2020, 12:07:07 p.m. EDT, Rudolf Schaffer <rudolf.schaffer@...> wrote:
Dear OM Gyula, For antennas measurements including feeders, filters, etc,? i'm using my NanoVNA-H connected to nanovna-saver in the shack. For direct antenna measurement, i'm using the VNA in "mobile" mode, tnx to the internal battery. As i'm not equipped with a RF generator and after measuring the RF output of the NanoVNA, (not too bad hi !) i thought to use it as a RF generator. I split the output (Mini-Circuits device 2 ways splitter)? in 2 outputs; one is used as the RF signal source (~-3dB loss) and the second output go to a frequency meter, with a G3RUH GPSDO as reference. As a "CW" command is not available in nanovna-saver, i used the "CW" function, entering directly the desired frequency "manually" into the nanovna. I asked via the group, if an other solution was possible and i received answers with 2 possibilities: -1- Using a null span sweep centered on the desired frequency and -2- Sending, with PuTTY free software, the " ch> freq {frequency value in Hz} to the same COM port after shutting down the nanovna-saver software. This is all the "story" and without the help found in the group, i would be still obliged to enter the frequency using the "CW" function described in the NanoVNA-H user Menu Structure paper furnished with the VNA. With my best 73, Rudi, HB9ARI Le 02.06.2020 ¨¤ 10:56, Gyula Molnar a ¨¦crit?: Dear Rudi, |
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One additional observation:
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If I pause the sweep and select the CW freq, there is no output until I un-pause the sweep. However, I can then pause the sweep again and the output remains on. On Tuesday, June 2, 2020, 12:47:37 p.m. EDT, Larry Rothman <nlroth@...> wrote:
Rudi, I don't understand the problem you are having with your nanovna-H. I have a current version of firmware on my nanovna and under the stimulus menu, there is "CW FREQ" The nanovna generates a constant output frequency - even if you press the "PAUSE SWEEP" button. As an RF generator, you will need to contend with all the harmonics as the Nano outputs a squarewave. regards,Larry ? ? On Tuesday, June 2, 2020, 12:07:07 p.m. EDT, Rudolf Schaffer <rudolf.schaffer@...> wrote: Dear OM Gyula, For antennas measurements including feeders, filters, etc,? i'm using my NanoVNA-H connected to nanovna-saver in the shack. For direct antenna measurement, i'm using the VNA in "mobile" mode, tnx to the internal battery. As i'm not equipped with a RF generator and after measuring the RF output of the NanoVNA, (not too bad hi !) i thought to use it as a RF generator. I split the output (Mini-Circuits device 2 ways splitter)? in 2 outputs; one is used as the RF signal source (~-3dB loss) and the second output go to a frequency meter, with a G3RUH GPSDO as reference. As a "CW" command is not available in nanovna-saver, i used the "CW" function, entering directly the desired frequency "manually" into the nanovna. I asked via the group, if an other solution was possible and i received answers with 2 possibilities: -1- Using a null span sweep centered on the desired frequency and -2- Sending, with PuTTY free software, the " ch> freq {frequency value in Hz} to the same COM port after shutting down the nanovna-saver software. This is all the "story" and without the help found in the group, i would be still obliged to enter the frequency using the "CW" function described in the NanoVNA-H user Menu Structure paper furnished with the VNA. With my best 73, Rudi, HB9ARI Le 02.06.2020 ¨¤ 10:56, Gyula Molnar a ¨¦crit?: Dear Rudi, |
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Herb,
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Thank you for your message and? explanations for use above 300 Mhz. Most of time, i use the VNA from 1.8 to 146 MHz but sometimes until 440 MHz. For this reason, i will follow your recommendation and construct a 300 MHz high-pass filter. Regards, Rudi Le 02.06.2020 ¨¤ 18:38, hwalker a ¨¦crit?:
On Tue, Jun 2, 2020 at 09:06 AM, Rudolf Schaffer wrote: |
Gyula Molnar
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