Application Notes …
Many Application Notes (even old ones) are being posted by Keysight. From the search box on this Keysight page you can get results that include vintage app notes. For instance, searching on AN57 brings up the “AN57 Noise Figure Primer”. Please check Keysight’s site before scanning and submitting any Application Notes. Below, the first table contains several HP-published Application Note Indexes, which may form a good starting place for your initial search.
| Year | HP Application Notes Index |
| 1962 | Covers Application Notes 1 through 57 |
| 1963 | Covers Application Notes 1 through 57 |
| 1967 | Covers Application Notes up to 917, with no coverage on many older notes |
| 1989 | [100 pages] 50th Anniversary publication, well organized by Subject, Industry, Model ect. |
| HP Number | Application Notes Title and Key Words |
| AB 5 | Current Source for Diode Testing |
| AN 19 | A Technique For Calibrating Phase Shifters To High Accuracy |
| AN 57-1 | Fundamentals of RF and Microwave Noise Figure Measurements AN 57-1 |
| AN 57-2 | Noise Figure Measurement Accuracy AN 57-2 |
| AN 62 | Time Domain Reflectometry [20 pages, 1964, Keywords HP 1415A 215A] |
| AN 64-1 | Microwave Power Measurement |
| AN 71 | Advances in RF Measurements Using Modern Signal Generators 50kc – 480MC [71 pages, 1966] |
| AN 88 | LOGIC SYMBOLOGY (Logic Symbols) [28 pages, 1967] |
| AN 89 | Magnetic Tape Recording handbook [40 Pages, 1967, Keywords HP 3960 3968] |
| AN 95-1 | S-Parameter Techniques for Faster, More Accurate Network Design |
| AN 123 | Floating Measurements and Guarding |
| AN-124 | True RMS Measurements |
| AN 243-4 | Fundamentals of the z-Domain and Mixed Analog-Digital Measurements |
| AN 326 | Coaxial Systems Principles of microwave connector care [11 Pages, 1986] |
| AN 718 | Patient Safety |
| Op Note Part Number | Operating Notes Title and Key Words |
| 5955-6270 | Hewlett-Packard miniature oscilloscope probes, models 10017A, 10018A, 10040A, 10041A, 10042A (Feb 1980) |
| Harrison Tech Letter # | Harrison Laboratories Division Tech Letters Title and Key Words |
| 1 | |
| Tech Let 2 | Constant Voltage/Constant current Regulated Power Supplies |
| Tech Let 3 | MEASUREMENT OF LINE AND LOAD REGULATION OF DC POWER SUPPLIES |
| 4 | MEASUREMENT OF OUTPUT IMPEDANCE OF A CONSTANT VOLTAGE POWER SUPPLY |
| 5 | |
| 6 | |
| Tech Let 7 | Notes On DC Power Supply Isolation Measurement |
| Tech Let 8 | 6920A Meter Calibrator Application Notes |