Support for the LeCroy 4222 delay module was recently added. You are both interested in the SSDN: +-----------------------+ | 0 | +-----------------------+ | 0 | 22 (hex) | +-----------------------+ | crate | slot | +-----------------------+ | 22 (hex) | channel | +-----------------------+ You get only a setting property. Channel is 0-3 (delay channel) The data length must be exactly 4 bytes (2 words). Note that Dec-T fakes in the constant 170 ns delay. Thus if you try to set a delay of less than 170 ns (a camac setting of 0) Dec-T will clamp it at 170 ns. Thus, for instance: User types in 200 ns on a parameter page Parameter page sends 200 to Dec-T Dec-T subtracts the 170 ns offset and writes 30 to the card Card runs with a delay of 30+170 = 200 ns Dec-T reads 30 from the card, adds 170, and reports back 200 ns