Cross-talk check

All acquisition is from (the first) seven channels – the 8^th is not enabled in software.

All but channel 6 (with ~2V 10 kHz sine wave; orange; used for central hydrophone) terminated.

None of the 8 channel inputs terminated (but all other BNC in’s and out’s of the adapter are terminated). After the central (orange) channel, the amplitudes are decreasing with channel number.

All but 6 and 0 terminated.

For comparison, a bulb signal. Period is roughly the same (100 microsec); white/orange is maybe 0.1 for the bulb but 0.8 in the test (previous figure).

All but 6 and 1 (red) terminated.

All but 6 and 2 (green) terminated.

All but 6 and 3 (blue) terminated.

All but 6 and 4 (yellow) terminated.

All but 6 and 5 (violet) terminated.

All but 6 and 7 (dark blue) terminated.

For the case of all but 0 and 6 terminated:

The white/orange ratio is constant for a (channel 6) amplitude of 0.3 through 2.5 V. It generally decreases with frequency:

1 kHz.

100 kHz.