This TDS784D  passes all internal self tests, self calibration, functional checks, error log is empty and is in decent cosmetic shape. There are a few minor blemishes; but not much to speak of. See the notes above and photos. It has options 13, 1F,  and 2F . The CRT is crisp, bright and clear. 

1 GHz Bandwidth, 4 Channels

• Sample Rates to 4 GS/s
• Record Lengths to 8 M Points
• Up to 200,000 Waveforms per Second
• 8-Bit Vertical Resolution, >11 Bits with Averaging and >13 Bits with Hi-res
• 1 ns Peak Detect
• Floppy Disk Storage
• Iomega Zip and Zip Plus Drive Compatible
• Advanced Triggering
• 29 Automatic Measurements and Measurement Statistics
• FFT, Advanced Math, Histograms, Limit Test
• FastFrame Time Stamp
• Communication Signal Analysis, Including Mask Testing and SONET/SDH and Fibre Channel Optical Reference Receivers
• GPIB