NarrowBand Frequently Asked Questions (FAQ)

Last Updated:  1January1998

Details: This file contains our answers to the most Frequently Asked 
Questions.

How to Update to latest version: To download all of the latest FAQ Questions
click on the download button.  Once downloaded double click on the 
file and the self-extracting file will open allowing access to the text 
file FAQ-NB.TXT.

Next Scheduled Update:  Regular updates will occur.  Updates will be 
posted as part of the Last Updated date at the top of this file.

Send all questions to the Customer Service Department.

EMAIL Address: rdifs@rdinstruments.com

Current List of FAQs:
1.  What are the major differences between the Broadband (BB)
    setup and the Narrowband (NB) setup?
2.  Does RDI have any programs that run in a Windows environment?
3.  What is the accuracy of the heading, pitch, and roll sensors
    installed in Narrowband ADCPs?
4.  In TRANSECT, is there a way to freeze the last good bottom-
    track velocity values for displays and calculations (dis-
    charge, etc.)?
5.  When installing RDI software, why do I get the error message
    "Not enough environment space"?
6.  What are the internal ADCP thresholds that exclude informa-
    tion from the Narrowband data output stream?
7.  What interrupts do I need for COM3: and COM4:, and what
    circuit board can I get that will provide them?
8.  Can I use an external trigger with the NBADCP to collect data
    from both the ADCP and an echo sounder without mutual
    interference?
9.  Do you have any information on using backscatter as a measure
    of turbidity?
10. How should I setup the NAVCFG smoothing filter used with
    NAVSOFT and TRANSECT?
11. Can I put my new BB-VM 150-kHz transducer into the same
    physical location as my old NB-VM 150-kHz transducer?
12. What is "ringing," and what do I do about it?
13. Regarding battery capacities, what are the lower operating
    voltage limits at which the ADCP will operate satisfactorily?
14. Can you give some recommendations for the Depth Cell Size and
    Blank After Transmit settings for narrowband systems?