HP5087B Distribution Amplifier manufacturers appears to have changed over the years, they have been sold by HP, Agilent and most recently Symmetricom.
This is a 12 channel wideband amplifier labeled by Symmetricom
The 5087B Wideband Distribution amplifier is an economical solution for distributing signals from various frequency standards such as Caesium, Rubidium, Quartz or GPS receivers.
Frequency standards typically have few outputs, each of which drives one load over short distances. When you have many devices requiring frequency reference inputs, or you need to deliver the frequency standard output from one building to another, the 5087B is the right choice.
Front panel lights allow you to check status of the amplifier at a glance. Indicators are provided for power, alarm, input, and all 12 outputs.
An alarm occurs whenever there is loss of input signal, or loss of any of the 12 outputs. The alarm signal can be connected to audible or visible alarms, or logically “Ored” to other alarms.
Full remote control and monitoring of the amplifier can be done through the Ethernet port, including checking status and alarm conditions.
Standards lab – simultaneous calibration of multiple test equipment.
Manufacturing and R&D – connecting all test equipment to the same frequency source.
Intra-building distribution – distributing frequency standards from the cal lab to manufacturing and R&D.