fs [US], Agilent / Keysight M9300A PXIe Frequency Reference, 100MHz, 899 USD

[testpoint1]

only one for sell;

used, in good working condition, its tolerence within 3GPP recommendations, but the application software may remind you to calibration it because the calbration cost is higher than the card;

there is no free solution to calibrate the card, today's keysight is NOT as the old HP, they only have money in their eyes;

ship to US 48 states in free.

https://www.ebay.com/itm/186193340621