Bob kb8tq

2018-05-11 18:09:40 UTC

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HiRaw Message

Well, having actually run FMT virtually “in the back yard” of the transmitting station …. it’s surprising

what 70 miles will do. In this case, back yard really does mean on the premises. There is a lot that

gets into even fairly sort distance propagation.

Bob

If you were in Connie’s back yard or had a very stable ground wave, then yes, you could automate the testing.

There are a number of challenges with this method as looking at the data with a simple graph will tell. You might have large fluctuations on the high frequency side only, for instance, that any averaging or algorithm would assume to be valid data.

The next issue is the length of the dataset as the key-down time is only a few minutes so you end-up with not that many samples.

Regards,

Jerry

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_______________________________________________There are a number of challenges with this method as looking at the data with a simple graph will tell. You might have large fluctuations on the high frequency side only, for instance, that any averaging or algorithm would assume to be valid data.

The next issue is the length of the dataset as the key-down time is only a few minutes so you end-up with not that many samples.

Regards,

Jerry

Hi Magnus...

Appreciate any help!

I participate in the ARRL Frequency Measuring Test,

and I would like to automate the measuring process.

I have two frequencies, A and B...

A is a GPS locked HP 3336B set to 455,000.000 Hz

I use the 3336B instead of the 455,000Hz BFO

signal from my GPS locked Racal receiver so

that I can measure AM stations without the

annoying beat note. ;-)

B is an IF signal which should appear between

455,000.000Hz and 455,001.000 Hz

I would like the 5372A to calculate the B minus A

delta, over a manually started and automatically

stopped measurement period of 110 seconds.

I would like a delta resolution of 0.001Hz to be

developed by the box.

Now, there will be doppler. I want the box

to analyze and give me a best statistical guess

for the B minus A delta.

BTW the B minus A delta will be added to the

frequency of my Racal receiver to give me the

best "guess" as to the correct frequency of the

target signal.

The Racal reads out to the Hz, and I am able to

accurately determine if the Racal is tuned above

or below the "target" frequency.

I will be tuned below the "target" and within

1 Hz of the "target."

I assume I will be in the one frequency mode.

Can the box give me the desired resolution?

What sampling period would be the best to use?

What statistical result would I use as my delta?

Appreciate your help. My head is spinning whenever I

get into the operating manual!

TNX...

73

Don

W4WJ

Hi,

What issues do you have?

Cheers,

Magnus

To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

_______________________________________________

To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

_______________________________________________Appreciate any help!

I participate in the ARRL Frequency Measuring Test,

and I would like to automate the measuring process.

I have two frequencies, A and B...

A is a GPS locked HP 3336B set to 455,000.000 Hz

I use the 3336B instead of the 455,000Hz BFO

signal from my GPS locked Racal receiver so

that I can measure AM stations without the

annoying beat note. ;-)

B is an IF signal which should appear between

455,000.000Hz and 455,001.000 Hz

I would like the 5372A to calculate the B minus A

delta, over a manually started and automatically

stopped measurement period of 110 seconds.

I would like a delta resolution of 0.001Hz to be

developed by the box.

Now, there will be doppler. I want the box

to analyze and give me a best statistical guess

for the B minus A delta.

BTW the B minus A delta will be added to the

frequency of my Racal receiver to give me the

best "guess" as to the correct frequency of the

target signal.

The Racal reads out to the Hz, and I am able to

accurately determine if the Racal is tuned above

or below the "target" frequency.

I will be tuned below the "target" and within

1 Hz of the "target."

I assume I will be in the one frequency mode.

Can the box give me the desired resolution?

What sampling period would be the best to use?

What statistical result would I use as my delta?

Appreciate your help. My head is spinning whenever I

get into the operating manual!

TNX...

73

Don

W4WJ

Hi,

What issues do you have?

Cheers,

Magnus

Hello Time Nuts...

Who is the resident expert on the HP5372A?

I have some operational questions. ;-)

email off list please. w4wj at aol.com

TNX all...

73

Don

W4WJ

_______________________________________________

To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

_______________________________________________Who is the resident expert on the HP5372A?

I have some operational questions. ;-)

email off list please. w4wj at aol.com

TNX all...

73

Don

W4WJ

_______________________________________________

To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

_______________________________________________

To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

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