***** UBC ECE ASSEMBLY ROOM ***************
***** HMP4040 Power Supply LOG BOOK
*****
***** Please submit any new entries by e-mail to: robertor [at] ece.ubc.ca
***** Entries include tips, bugs, damage reports, custom improvements, etc.

**** DOCUMENT HISTORY
**** Created: 		26/Mar/2025.
**** Last Change: 	26/Mar/2025.
**** Version: 		1.01.01
**** version digits indicate # updates of type: [ description, maintenance, user ]

***** STATUS: Operational
 
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** 1. INSTRUMENT DESCRIPTION

***** 1.1 ORIGIN
Bought on Spring 2024 from Dept funds for MCLD1022, RT508350.

***** 1.2 CAPABILITIES
Linear Power Supply
Quad Output, 4x 32 V / 10 A, 384 W, HMP Series
Sense
Rear connectors
Fuse Link
Arbitrary waveform 

Maximum power per channel is: 160W

NO LAN or USB Connectivity, the supply can only be controlled by hand.

***** 1.3 CONFIGURATION WE HAVE

SN: 3629.6776.04-123740-RZ
ECE: 101342
Instrument URL: NA
MAC ADDRESS: NA

Options: none

***** 1.4 MANUALS
https://people.ece.ubc.ca/~eng-services/files/eHUB/Bench2-RF/HMP4040%20DC%20Power%20Supply/

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** 2. INSTRUMENT MAINTENANCE

26-Mar-2025 Roberto: About remote controlling the unit.
We do not have option R&S HO732. This is a board that can be inserted on the back to add 1x LAN and 1x USB ports.
Without it the supply can only be controlled manually. 

Downloaded HMExplorer_1_7_9.msi to:
https://people.ece.ubc.ca/~eng-services/files/eHUB/Bench2-RF/HMP4040%20DC%20Power%20Supply/

This is the app used to generate arbitrary waveforms and communicate with the supply.
Without option R&S HO732, the App can at least be used to create the waveform comma separated values that the user would enter manually on the power supply.

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** 3. USER ENTRIES

02-Apr-2025 Roberto: about power budget
	The HMP4040 does not enforce the total power limit at the configuration stage, it enforces the 384 W total limit dynamically.
    	This means that you can set V*I up to max 160W per channel on all channels simultaneously.
	The unit monitors total power drawn in real time, and if the total exceeds 384 W, it will limit current on one or more channels to bring the total back within spec.
	What strategy is used to do this is unknown.
	It probably limits the channel(s) using the most power first, but R&S does not officially specify this prioritization

26-Mar-2025 Roberto: HMExplorer
	Arbitrary waveforms data points must be entered manually. The app HMExplorer installed on the PC of bench #2 is helpful to create the data points.