I was trained on HP, Genrad, Teradyne and Fairchild ATE and have years of experience doing digital modelling and programming on them. Each uses different methods though, that's why I asked which in particular you meant.
For normal logic pull-down I would suggest a simple resistor and to use one of the ATE relays to connect it to ground. A programmable load is normally used in higher power applications and it may not have sufficiently low impedance at high frequencies to work in a logic circuit.
Brian.