Condition: This module is a new OCXO board with a used OCXO installed for the Agilent 5328A and 5328B counters. The board plugs into the connector on the main board and can be attached to the internal panel like the original OCXO. The spacer and screw is included. The OCXO is powered by the "always ON" 24V power source used to power the original OCXO and also uses the "clean" 5V for the output logic. The OCXO on the board stabilizes within 3 to 5 minutes after turn ON but should be on for at least one hour if calibrating. The frequency adjustment is a 25 turn pot connected to a precision reference chip and usually comes out around mid scale when adjusted for 10MHz. It will ship adjusted against a GPS reference. There are test points on the board (not populated) for measuring the OCXO trim voltage and other signals/voltages if desired.

You will need an accurate and stable 10MHz reference clock such as a Rubidium reference oscillator or GPS stabilized reference if you plan to calibrate the counter yourself. The counter will only be as good as the reference used for calibration.

PayPal Confirmed Address: PayPal address must be confirmed and must be the same as the shipping address.Returns: All items are sold as-is unless otherwise stated. 

Returns: Returns accepted within 30 days.

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Shipping: Shipping is to USA or international via EBAY shipping service.