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HB7 Tech Notes

Cross talk on left channel of HB7

TN0066

Product: HB7
Version: All
Date Added: 2003-01-10

Issue

When two channels are used for high voltage, high frequency signals, the left channel may exhibit up to 45 dB cross talk from the right channel.

Workaround

For high voltage, high frequency signals use only one channel per HB7, grounding the second channel.

HB7 AC/DC switch reversed

TN0042

Product: HB7
Version: Serial numbers < 2000
Date Added: 2002-08-15

Issue

On HB7 devices with serial number < 2000 the AC/DC switch is reversed.

Solution

The AC/DC switch on HB7 devices with serial number greater than 2000 has been corrected. There is no need to replace older devices, but customers should be aware that the switch is reversed.