Originally published at: HP Agilent 5328A 5328B Counter OCXO Board similar to 10544A - Chratec Part
![](https://cds.chemvn.org/original/3X/a/f/afa8cd1d8c0bb1c1c65c23b35a2ab0b686e9adfc.jpeg)
The first two pictures are of the board with aused ISOTEMP OCXO installed. The third picture shows the board mounted in a 5328A counter (not included). No changes to the 5328A/B are required, the counter detects the board and switches to it.
chratec.com