Third-party reference photo of the exact Agilent E4422B. Background removed with an alpha-only manual mask. The screen content and installed options are only those of the photographed example. This is not an offered-unit photograph.
Third-party reference photo of the exact Rohde & Schwarz NRP-Z55. Background removed with an alpha-only manual mask. The attached cable exits the original photograph; off-frame cable is not reconstructed. The 480 by 320 source limits fine detail. This is not an offered-unit photograph.
Manufacturer series reference image for Keysight N7776C-013, showing an N7776C labeled 1450-1650 nm. The manufacturer lists N7776C-013 as 1250-1370 nm; the pictured wavelength configuration differs.