HP 70427A User Manual page 179

Remote Programming
HP 70428A Option 002 Tunable Source Program Example
Tunable Source Program Comments
40 Reset the instrument.
70 Input desired tuneable source output frequency.
80 Convert RF output frequency from GHz to MHz.
110 Calculate the nearest combline.
160 Ensure the first combline attempted will generate an LO frequency
above the RF output frequency. This must be done since there is
no combline available below 2.4 GHz.
170 Convert the combline number into an LO frequency.
180 Calculate the RF source frequency.
190 Make sure the RF source frequency is in the correct range.
200 The RF source frequency was out of range so change the LO
frequency.
210 Re-calculate the RF source frequency.
240 Convert the combline number into an LO frequency.
250 Calculate the RF source frequency.
260 Make sure the RF source frequency is at least 300 MHz. Since
there is not a 26.4 GHz combline, an RF source frequency of greater
than 600 MHz is ok.
270 The RF source frequency was less than 300 MHz so change the LO
frequency.
280 Re-calculate the RF source frequency.
330 Set the RF source to the correct frequency and output power.
360 Convert the LO frequency to GHz and to a string expression.
370 Set the LO frequency.
400 Convert the RF output frequency to GHz and to a string expression.
410 Set the RF output frequency.
40 Set the RF output power to +10 dBm.
480 Start a loop to read any error messages in queue.
490 Query any error message.
500 Read any error message.
510 Exit loop if there are no error messages or they have all been read.
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