Fortress Technologies An E1T Timepiece, Manual

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2. Main Board Option Jumpers
There are eight jumpers on the main board (component X3 near to the backup battery/super-
cap) which can select operating options that need to be decided as the clock is initially starting
up. Jumpers must only be fitted or removed when the clock is switched off.
The options jumpers are numbered 1 to 8 and
control the following:
1. Start in Test Mode - when fitted the clock
starts into “test mode” rather than “normal
mode”. In test mode most of the high level
clock automation is stopped. All of the
clock sub-systems like the SD card, the LDR
etc. all operate but the sleep system,
automatic clock start up etc. are held off.
This enables the clock low level systems to
be tested using the console menus without interference from the high level clock automation.
2. Plug-in module pass-through mode - if the clock is in “test mode” then all of the clock's
normal operation is stopped except the console is connected directly to the serial port on the
plug-in module, i.e. the WiFi module or GPS module. In the case of the WiFi module it enable
commands to be typed and sent to the ESP32-BIT and its responses seen. In the case of the
GPS module the console shows all the NMEA text data from the module. If the clock is not in
“test mode” then the setting of this jumper is ignored.
3. Permit automatic PSU start up - the 6.3V heater PSU and 300V flyback HT PSU will normally
start up automatically when required. Fitting this jumper allows these PSUs to start
automatically. This option is primarily for safety. The two PSUs can still be started manually
using the console. See the OUTS command.
4. Not currently used.
5. Not currently used.
6. Non-volatile RAM clear - the clock has a small memory chip that is “non-volatile” in that its
contents are not lost when the clock is switched off. The chip can be cleared to the default
settings by fitting this jumper and starting the clock. Once the clock has started up, the clock
can be switched off and the jumper removed.
7. Forced audio mute - fitting this jumper will force the clock to be entirely quiet. It will not beep
or play chimes. The setting cannot be overridden using the IR handset, the rotary encoder or
using the console commands. The clock will remain entirely quiet!
8. Verbose scripts - when the clock is starting up and operating normally detailed progress
messages will be sent to the console. These messages are different to the Nuggle debug
settings in the lexer, parser and expression evaluator.
The option jumper positions are normally only read only once when the clock is started up but
see the OPTS and OPTU menu commands.
Page 46 Version 1.0 Copyright Grahame Marsh/Nick Stock 2019
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