| 004 | Precision Frequency Reference | 
| 009 | Local Oscillator and Sweep + Tune Outputs (rear panel) | 
| 010 | Built-in Tracking Generator, 50 Ohm (100 kHz-1.8 GHz) | 
| 015 | Protective Soft Tan Carrying/Operating Case | 
| 016 | Protective Soft Yellow Operating/Carrying Case | 
| 024 | Parallel interface replaces HP-IB I/F | 
| 040 | Front Panel Protective Cover w/CRT Viewing Hood | 
| 042 | Protective Soft Carrying Case/Backpack | 
| 078 | HP 85878A Report Generation Software | 
| 101 | Fast Time-Domain Sweeps and Analog + Display | 
| 102 | AM/FM Demodulator with Speaker and TV Sync Trigger | 
| 11947A | Transient Limiter | 
| 11956A | Log periodic antennae | 
| 11966C | Biconical antenna(30-300MHz) | 
| 11966D | Log periodic antennae(.2-1 GHZ | 
| 11966E | Ridged horn (1 to 18 GHz) | 
| 11966L | 10 meter N cable | 
| 11966N | Log periodic antenna | 
| 11966P | Broadband antenna(30MHz-1GHz) | 
| 301 | TV sync. trigger capability, fast time domain sweeps, AM/FM demodulator, and Analog + display (Optio | 
| 703 | Delete Quasi-Peak Detector and AM/FM Demodulator | 
| 908 | Rack Flange Kit for Use without Handles | 
| 909 | Front Handle & Rack Flange Kit | 
| 910 | Additional operating and service manual | 
| 915 | Component Level Information and Service Guide | 
| UK6 | Commercial calibration with test results data |