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Do the N2276A/B Switch/Attenuator Driver Cards Support Control of the 84904M, 84905M, and 84908M 50 GHz Attenuators?

The 84904M, 84905M, and 84908M 50 GHz attenuators have not been "formally" tested in conjunction with the 3499A/C and the N2276A/B. It is the expectation that the combination of the 84904M, 84905M, and 84908M 50 GHz attenuators combined with the 3499A/C + N2276A/B switch/attenuator driver cards provide full compatibility.

HISTORY

The 84904M, 84905M, and 84908M 50 GHz attenuators were released at approximately the same time as the N2276A/B switch/attenuator driver cards. The 3499A/B/C User's Guide chapter 7 regarding the N2276A/B specifically delineates support of the 84906K/L, 84907K/L, and the 84904K/L attenuators. (The 8490xK series are 26.5 GHz attenuators, while the 8490xL series are 40.0 GHz attenuators). However, there is no reference to the 84904M, 84905M, and 84908M 50 GHz attenuators. The lack of "formal" compatibility information is suspected to be due to product introduction timing (of the N2276A/B and the 8490xM 50 GHz attenuator family).

The 84904M, 84905M, and 84908M 50 GHz attenuators are identical to the 84906K/L, 84907K/L, and the 84904K/L attenuators except for the additional frequency coverage to 50 GHz.

Formal indications are "this configuration should provide 100% compatibility but has not been officially tested".

If you are intending to implement this configuration, ensure the 8490xM series attenuators are equipped with option 024 (+24 Vdc coil voltage).