| 042 | Gray Backpack carrying case |
| 044 | Yellow Backpack Carrying case |
| 0B0 | Do not include manuals |
| 0B1 | Add Manual Set |
| 1AX | RS-232 and Centronics interface |
| 1CP | Rackmount and Handle Kit |
| 1D5 | High Stability Frequency Reference |
| 1D6 | Time-Gated Spectrum Analysis |
| 1D7 | 50 -75 ohm minimum loss pad |
| 1DN | 50 Ohm Tracking generator |
| 1DR | Narrow resolution bandwidths to 10 Hz. |
| 1DS | 3 GHz Preamplifer |
| 230 | Benchlink Web remote control software |
| 290 | 8590E series emulation s/w |
| A4J | IF, Sweep, and Video Ports |
| A5D | 12 Vdc power cable |
| AB0 | Taiwan Quick Users Guide (Chinese localization) |
| AB1 | Korea Quick Users Guide (Korean localization) |
| AB2 | China Quick Users Guide (Chinese localization) |
| ABD | Germany Quick Users Guide (German localization) |
| ABE | Spain Quick Users Guide (Spanish localization) |
| ABF | France Quick Users Guide (French localization) |
| ABJ | Japan Quick Users Guide (Japanese localization) |
| ABZ | Italy Quick Users Guide (Italian localization) |
| AH4 | IEEE-488 Bus Connector |
| AJ4 | IF & Sweep Ports |
| AXT | Hard transit case |
| AYQ | EMI detectors and FM demodulation |
| AYT | Gray soft carrying/operating case |
| AYU | Yellow Soft Carrying/Operating |
| AYX | Fast Time-domain Sweep |
| B70 | Benclink software |
| B7K | Cable fault measurement kit |
| UK6 | Commercial calibration with test results data |
| UK9 | Front Panel Cover |
| UKB | Low frequency extension 100 Hz (30 Hz useable) |