A4H HP-IB and parallel (Centronics) interfacesrn(not compatible with Option 1AX)rn❑ 1AX RS-232 and parallel (Centronics) interfacesrn(not compatible with Option A4H)rn❑ A4J IF, sweep, and video ports (not compatiblernwith Option AYX)rn❑ 1DN 50-Ohm tracking generatorrn(9 kHz to 1.5 GHz for HP E4411B)rn(9 kHz to 3.0 GHz for HP E4403B andrnHP E4408B)rn❑ 1DP 75-Ohm input impedancern(1 MHz to 1.5 GHz) HP E4411B onlyrn❑ 1DQ 75-Ohm tracking generatorrn(1 MHz to 1.5 GHz) (requires Option 1DP)rn❑ 1D7 50 to 75-Ohm matching padrn(type n (m) to BNC (f))rn❑ A5D 12-Vdc power cablern❑ 0B0 Deletes manualsrn❑ AYT Soft operating/carrying case (grey)rn❑ AYU Soft operating/carrying case (yellow)rn❑ AXT Hard transit casern❑ UK9 Front-panel protective coverrn❑ 1CP Rack-mount kit with handles and slidesrn❑ 0B1 Additional user and calibration guidesrn❑ 0BW Assembly-level service guidern❑ UK6 Commercial calibration certificate with datarn❑ 8ZE Refurbished spectrum analyzer (as available)rn❑ W32 Three-year calibrationrn❑ W50/52 Additional two-year service and support/rnfive-year calibration