Choosing among oscilloscopes signal spectrum analyzers can mean deciding between a ready-to-use instrument and a lower-cost project with substantial condition considerations. Here, the key split is straightforward: the Hewlett Packard HP 8563E is described as tested and working with coverage from 9 kHz to 26.5 GHz, while the HP 8559A offering is a lot of three units sold for parts or not working.
Quick verdict
Pick the Hewlett Packard HP 8563E Spectrum Analyzer when the priority is a used HP analyzer described as tested and working, with a stated upper range of 26.5 GHz. Its "No Options" title is important: it is the more direct choice for someone whose work suits the configuration named in the title.
Choose the Hewlett Packard HP 8559A 21GHz Spectrum Analyzer Lot of 3 when the goal is acquiring three HP 8559A plug-ins at the lower listed price and accepting a parts-or-repair condition. The lot format and its described panel and component issues make it a fundamentally different purchase from the working 8563E.
At a glance
| Comparison point | HP 8563E Spectrum Analyzer | HP 8559A 21GHz Lot of 3 |
|---|---|---|
| Listed price | USD 1,299.99 | USD 140.00 |
| Condition | Used; tested and working | For parts or not working |
| Stated frequency coverage | 9 kHz-26.5 GHz | 21 GHz |
| Configuration cue | No Options | 50 Ohm installed option |
| Format | Spectrum analyzer | Lot of 3 plug-ins |
The listed-price spread is USD 1,159.99. That gap aligns with the central distinction: a working instrument on one side and a multi-unit parts lot on the other.
Where each HP analyzer fits best
The HP 8563E wins for operational use. Its description calls it tested and working after being pulled from a working environment, and the title specifies RF/microwave coverage through 26.5 GHz. For a shopper whose requirement includes that upper-frequency figure, it is the clear match between these two choices.
The HP 8559A lot wins for component-minded projects. Three 21 GHz HP 8559A plug-ins are included, rather than one analyzer. The description also identifies individual-unit differences, including that unit #3 appears to have most knobs and has a 70 dB step attenuator and second oscillator detector. That makes the lot most relevant where multiple units and their parts are the objective.
Product notes
Hewlett Packard HP 8563E Spectrum Analyzer 9kHz-26.5GHz RF Microwave No Options
The strongest reason to choose the HP 8563E is its operational description: it is used, tested, and working. Its stated 9 kHz to 26.5 GHz span also gives it the broader named frequency reach in this comparison, making it the sensible direction for RF or microwave work that calls for coverage above 21 GHz. The listed price is USD 1,299.99, placing it at the higher end of this head-to-head decision. The important limitation is directly in the title: "No Options." Buyers should select it for the configuration identified there, rather than treating it as an option-equipped variation. This is the focused choice for someone seeking one working HP spectrum analyzer rather than a restoration-oriented lot.
Hewlett Packard HP 8559A 21GHz Spectrum Analyzer Lot of 3
The HP 8559A offering makes sense when a lot of three 21 GHz plug-ins is more useful than one ready-to-use analyzer. At USD 140.00, it has the lower listed price, and the 50 Ohm installed option is specifically named. Unit #3 is described with a 70 dB step attenuator and second oscillator detector, providing a concrete reason for shoppers interested in the components within the group. Its limitation is significant and explicit: the condition is "For parts or not working." The description also calls out missing knobs or buttons, a missing red display window on the second unit, and some connectors, switches, or potentiometers not attached to panels. Treat this as a hands-on repair or parts acquisition rather than an operational substitute for the HP 8563E.
Final choice by use case
For a used spectrum analyzer described as working and reaching 26.5 GHz, choose the HP 8563E. For a lower-priced collection of three 21 GHz HP 8559A plug-ins intended around parts, repair, or component use, choose the HP 8559A lot of 3. The deciding factor is less about brand-both are HP-and more about whether your need is a working single instrument or a parts-condition multi-unit project.
