An Fscan of H1:CAL-DELTAL_EXTERNAL_DQ during the April 2 lock is here:

https://ldas-jobs.ligo-wa.caltech.edu/~pulsar/fscan/H1_DUAL_ARM/H1_DUAL_ARM_HANN/H1_DUAL_ARM_HANN/fscans_2015_04_02_06_00_02_PDT_Thu/H1_CAL-DELTAL_EXTERNAL_DQ/fscanH1_CAL-DELTAL_EXTERNAL_DQ_H1_1111928417_1112014818.html

(Clink on the "old" button to see the plots.) The Fscans are used to look for lines in the data.

A 4 Hz comb is still seen in the power versus frequency spectra, and a number of wandering lines are seen in the time-frequency spectrograms.