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HP 70428A Option 002 Tunable Source Program Example
Tuning Algorithm Description
The portion of the algorithm for determining the HP 70428A option 002's
LO and the RF source's output frequencies is shown below:
I.
Determine the desired tuneable source output frequency in MHz.
II.
Calculate the nearest 600 MHz Harmonic (referred to as a combline)
and its number.
III.
Set the LO and RF source frequencies.
A.
If the desired tunable source output frequency < 25800 MHz.
1. Increment the combline number by I to ensure desired tuneable source
output and LO frequencies are not the same.
2. Convert the combline number to an LO frequency.
3. Determine the RF source frequency.
a. If the RF source frequency < 300 MHz or > 600 MHz.
b. Decrement the LO frequency by 1 combline number.
4. Set the LO and RF source frequency.
B.
If the desired tunable source output frequency
1. Convert the combline number to a frequency.
2. Determine the RF source frequency.
a. If the RF source frequency <300 MHz.
b. Decrement the LO frequency by 1 combline number
3. Set the LO and RF source frequency
Remote Programming
≥
HP 70427A/HP 70428A User's Guide 7-19
5900 MHz.
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