AM26LS32ACD and TTL or RZ?

David,

While it is uncommon practice, you could try biasing one receiver input to a mid supply (i.e. 2.5V) and use the othere receiver input as data input transitioning between 0V and 5V. The reson for this is, you must create a differential voltage between both inputs.

Hope this helps and let me know how it works.

Regards,

Thomas.