| Temp in C | PPM |
|---|---|
| 25 | 0 |
| -20 | -1.16 |
| -15 | -0.53 |
| -10 | -0.89 |
| -5 | -0.93 |
| 0 | -0.73 |
| 5 | -0.7 |
| 10 | -0.58 |
| 15 | -0.37 |
| 20 | -0.28 |
| 25 | 0 |
| 30 | -0.03 |
| 35 | -0.14 |
| 40 | 0.78 |
| 45 | 0.73 |
| 50 | 0.82 |
| 55 | 0,86 |
| 60 | 0.89 |
| 65 | 0.81 |
| 70 | 1.26 |
K3 support for this feature is not yet complete. The temperature compensation data may be entered, but the MCU does not yet use this data to adjust the K3's frequency.
Enter the frequency and temperature test data that accompanied your KTCXO3-1 1 ppm High Stability Reference Oscillator.
The crystal oscillator frequency appears at the top of the test data slip. It is normally 49.38 MHz, or 49380000 Hertz.
Enter the frequency of your crystal oscillator into the corresponding dialog text box.
The temperature data is a table with one row per calibration temperature. The columns of interest are the Temperature (°C) and the corresponding Frequency Delta in parts per million (PPM). This column may be headed with Fr Delta (ppm) or just PPM.
Enter each of the Frequency Delta (PPM) values into the text box that corresponds to the temperature.
The first few hundred KCTXO-3 data sheets used a different temperature row sequence. Be careful to enter the correct sign. -.56 ppm is very different from .56 ppm.
The starting temperature of 25 degrees may appear twice on your test data sheet, but it is entered only once in the dialog.
The "Allow K3 to Use Calibration Data" check box should be selected if you wish the K3 to use this calibration data to respond to varying temperatures. The "Allow K3 to Use Calibration Data" check box will be made available when MCU support for this capability is complete.
Press OK or Apply when all the values have been properly entered. It takes 20 or 30 seconds to write the resulting tables to the K3's EEPROM storage; please be patient.
Enter the Frequency Delta (PPM) value in the dialog form in the box that corresponds to the appropriate temperature.
The table below is a sample. You must enter the values that accompanied your KTCXO3-1.
The first 25° row on the test data sheet is not entered into the dialog.
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The first few hundred KCTXO-3 units were accompanied with a half-page slip with the sequence of temperatures shown in the table at the left side below. Note that the sequence of temperatures is 25 down to -20° and then 25 up to 70°. The temperature may be slightly different from the nominal 5 degree increment; use the closest temperature. You should enter the Frequency Delta (PPM) value in the dialog form in the box that corresponds to the appropriate temperature.
The values shown below come from the data that accompanied my KTCXO3-1. You must enter the test data that accompanied your KTCXO3-1.
The first 25° row on the test data sheet is not entered into the dialog.
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