Postby 5B4AIY » 15 Sep 2014 08:22
This is the final optimisation. With two exceptions, the internal changes are not visible at the User Interface level.
Common Serial Buffers
The PA-100D can operate with one of two serial port protocols - Juma TRX-2 or KX3. Previously, for development and test purposes, separate command buffers and buffer clear functions were used. As the firmware is now in a mature state, this is no longer necessary, and thus the serial protocols now use a common command buffer and buffer clear function.
Optimised LCD Timing
The LCD is a backlit 16 character by 2 line display using the common Hitachi HD44780 command set. These displays are available from a n umber of vendors and have common mechanical and electrical interfaces. Unfortunately, the timing characteristics are somewhat variable. I have examined the various data sheets from a number of vendors, and altered the LCD display module to ensure that even with the slowest display the timing constraints will be met. This version of the firmware should therefore work with almost any compatible display.
Modified Calibration & Setup
The forced restore defaults page in this menu has been eliminated, as this very rarely used function is already available from the front-panel. If you ever have need to restore the defaults, then, from the power off state, press and hold the BAND+ button, and power up the transceiver. Continue to hold the button until the Reset Defaults prompt appears. Release the button, and briefly press the BAND+ button to restore the defaults, or the PWR button to cancel the operation.
Modified User Configuration Menu Prompt
Previously, when entering the User Configuration menu, the last selected menu page would be immediately displayed. In this version, to enter the User Configuration menu, press and hold the DISPLAY/CONFIG button. After the second function timer has expired you will receive a prompt: 'User Configuration' that will be displayed as long as the DISPLAY/CONFIG button is held. Release the button, and the last selected configuration page will be displayed. Select pages with a brief press of the DISPLAY/CONFIG button, edit the values with the UP/DOWN buttons, press and hold the DISPLAY/CONFIG button to rapidly select a menu page. To exit, briefly press the OPER button and respond to the prompt.
Whilst I am certainly not abandoning the PA-100D or the TRX-2 by any means, this is likely to be the last version of the firmware for this amplifier unless a bug is discovered, or someone requests another user feature. I will still continue to monitor this website, and will provide such technical help/assistance as I can.
