MSO5000 returns memory depth value in that format, e.g.
sr: [04:21.491949] scpi_vxi: Successfully sent SCPI command: 'ACQ:MDEP?'.
sr: [04:21.501463] scpi: Got response: '4.0000E+03', length 10.
[ gsi: drop redundant assignment and parens, amend diag message ]