Aphex 1788A Premium Eight Chan Mic Pre - Manual (Page 2)

The pin-out configuration of the RS-422 connectors has been changed to increase
compatibility with several commercially available RS-232 to RS-422 converters.
Below is a diagram of the new pin-outs for the RS-232 and RS-422 connectors.
All other information in Section 3.8 and 3.9 of the Model 1788 User’s Manual is correct.
Please visit our web site for more information about connecting your Model 1788 via RS-422.
Note our new URL: www.aphex.com.
Adjusting Front Panel Luminosity
To enable your Model 1788 to integrate into varying lighting conditions, we have added the
capability to adjust the brightness of the front panel display.
To activate this function, simultaneously press both TEST TONE buttons and the CHANNEL
SELECT button for Channel Seven, The brightness level, from 0 to 4 (4 is brightest) will be
displayed on the status display. Brightness can then be adjusted by rotating the GAIN CON-
TROL knob. To exit this function, press any button on the front panel.
Displaying Flash Program Version
We have added the capability of displaying which version of flash memory is installed on your
Model 1788. To view the flash memory in the status display, simultaneously press both TEST
TONE buttons and the CHANNEL SELECT button for Channel Eight. For your reference, the
current version of software at the time this addendum was printed is FLAS_C. If a different
version is displayed, the latest version can be downloaded directly from our website. Note our
new URL: www.aphex.com. Installation instructions are included with the download.
Link In RS-232/RS-422
(male)
Link Out RS-422
(female)
1 2 3 4 5
6 7 8 9
Link In RS-422
Pin# Signal Name
1 Ground
2
Transmit A ( -)
3 Receive B ( + )
4 Ground
5
(not used)
6 Ground
7 Transmit B ( + )
8 Receive A ( -)
9 Ground
Pin# Signal Name
1 (not used)
2 Receive Data
3 Transmit Data
4 (not used)
5 Ground
6 (not used)
7 (not used)
8 (not used)
9 (not used)
Link In RS-232 Link Out RS-422
Pin# Signal Name
1 Ground
2
Receive A ( -)
3 Transmit B ( + )
4 Ground
5
(not used)
6 Ground
7 Receive B ( + )
8 Transmit A ( - )
9 Chassis Ground
All grounds are connected together internally within the Model 1788.
9 8 7 6
5 4 3 2 1
Aphex Systems, Ltd. • 11068 Randall Street • Sun Valley, CA 91352
PH: (818) 767-2929 FAX: (818) 767-2641
Copyright© 1999 by Aphex Systems, LTD. All rights reserved. All Aphex products are trademarks
or registered trademarks of Aphex Systems, LTD. Other brand and product names are trademarks
or registered trademarks of their respective holders.
All features and specifications are subject to change without notice.