K as KALIBRATE
So, before anything else, you will have to calibrate JAGUAR LITE. Tune in to a known calibration frequency (in our tests we have used UK 1215 and UK 1341). If the station used as a reference is dominant and you can see a sharp needle as the peak, press the K (KALIBRATE) key once. That's it, you're done!
The frequency of 810 kHz has also often been used as a calibration frequency in Europe: both UK (BBC Radio Scotland) and MKD are known to be on the spot (810.0000).
You also have to remember that the Perseus receiver has to warm up properly for 1 or 2 hours before you can consider your calibration to be stable. However, while the hardware is still 'warming up', the files recorded during that time - and in fact any old uncalibrated Perseus recordings - can be calibrated at any time later on a per-file basis. In other words, you can get exact offsets even if you have never calibrated your Perseus hardware.
You can always check whether your calibration is on the spot by double-checking with 2-3 known offsets - and if they are not ... just KALIBRATE again!
ALT-K: CALIBRATE ON OFFSETS
Please note that you can also use any offset for calibration purposes. For example, if you hear CIWW loud and clear on 1310 kHz and SPECTOR shows a sharp peak on 1310.0000 but you know that CIWW in fact has the exact stable offset frequency of 1310.0001 kHz, you can calibrate JAGUAR LITE on that offset as follows:
Press the ALT-K (ALT KALIBRATE) key combination, and move the peak to 1310.0001 with the arrow keys or the mouse wheel. Now, the entire MW dial has been calibrated based on CIWW on 1310.0001 kHz.
In Europe, CZE 954 is known to have a stable offset of 953.9993, so this is also a good alternative for ALT-K.