---------1---------2---------3-'-------4---------5---------6-----
(View MAXIMIZED or PRINT with a fixed font such as Courier 10 pt)
=================================================================
                           BULLETIN
    FSB-114 - 1200-kHz WHADCP MAY FAIL TRANSMIT AND PT4 TESTS
                    DATE/REV:  01OCT97 / 0
=================================================================

ABSTRACT: During the PA tests, 1200-kHz Workhorse ADCPs may fail
the TRANSMIT TEST or may fail the PT4 test.

INSTRUMENT/PROGRAM AFFECTED:  All 1200-kHz Workhorse ADCPs with
firmware version 8.19 or earlier.

DESCRIPTION:  Due to a recent hardware change, we found that the
scaling of the circuit that measures the transmit current and
voltage in 1200-kHz Workhorse systems is incorrect. The result is
that the PA TRANSMIT Test and the PT4 test will fail.

SOLUTION/ACTION:

Short-Term:  If the PA TRANSMIT Test fails, use the BBTALK
program to run the PT4 test. The PT4 test transmits three lines
of information: IXMT, VXMT, and Z. The results for Z must be less
than 200 ohms. However, due to the hardware change, Z may be
higher. If the results of this test are less than 300 ohms, your
system is in good working order.

Long-Term:  In November, we expect to have a firmware upgrade
that changes the specifications range. We will announce this new
firmware release in our newsletter.
=================================================================