HP EPM-441A User Manual page 39

Getting Started
Rack Mounting the Power Meter
To rack mount a single instrument, order option 908, or adapter kit
5063-9239.
To rack mount two instruments side by side, order option 909, or lock-link
kit 5061-9694 and flange kit 5063-9212.
To install one or two instruments in a sliding support shelf, order shelf
5063-9255, and slide kit 1494-0015 (for a single instrument, also order
filler panel 5002-3999).
HP EPM-441A User's Guide 1-17