RLJ Credit Opportunity Fund, headed by Black Entertainment Television founder Robert L. Johnson, has made an investment in ShareTracker.

ShareTracker, headquartered in Ashland, Mo., provides communications and telecom market-share measurement products. The investment should help the company expand its market share to include cable, satellite and fiber television services. The deal allowed ShareTracker to acquire assets to advance the business, Johnson says in a statement.

RLJ Credit, headquartered in Bethesda, Md., generally invests between $3 million and $10 million in each transaction. The group senior debt and subordinated debt investments in lower middle market companies.

In February, RLJ Credit Management LLC closed RLJ Credit with $135 million in assets under management. The fund is one of the largest minority-owned small business investment company funds.

Johnson has been active in the dealmaking world. In 2012 he bought Image Entertainment Inc. and Acorn Media, which he combined to form RLJ Entertainment. 

For more coverage, see "Private Equity Perspective: The RLJ Rule."