You didn't really say in your description but you really need to have the loop open using the front panel switch before you try to adjust the oscillator. Unless you are very familiar with how tiny of a turn it takes to make it too far off to lock, you will have it out of range very quickly. Open the loop and connect the 5Mhz output to a good frequency counter, preferably one that is synched to another rubidium, GPS locked crystal or cesium. Once connected, adjust your crystal coarse adjust for as close to 5Mhz as possible. If you can't get it below a 0.1 hz error, you are going to have trouble getting the unit to lock. Make sure you allow a good warm up time for the crystal in the 5065 before you do any adjusting. If you can get the crystal to that small of an error, then close your loop and watch the control meter setting. Typical is that the meter will move a small amount but not peg. If it pegs, you have another problem with the unit. If it moves a small amount and stops, you can then adjust the coarse or fine and bring the meter back to zero. If you use the coarse adjust, at this point, you are going to be making VERY tiny adjustments of it. Let us know what you find from this and we can move you to the next step. Chuck Norton
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