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contd ideas cwtrx

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Yargo Bonetti 2018-07-06 00:05:38 +02:00
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## CWTRX
low-power portable (70cm) transceiver for short range CW contacts
low-power portable (70cm) CW transceiver, for short range contacts
### general features
- supply 5..12 V, optimized for 5 V (USB)
- power save mode with variable squelch (trimmer?)
- power save mode with variable squelch (trimmer? electronic?)
- beacon mode: call sign transmission unless squelch open, pause
### RF section
- at least 432000..432400 kHz, up to 438000 if possible
- range limits settable for manual and automatic scans
- antenna: socket? headphone cable? key cable?
- TX: min 0.1 W, optional 0.5 and 2 W
- RX: direct conversion or BFO (mechanical/electronic 100 Hz steps)
- range limits selectable, valid for manual and automatic scans
- antenna: socket / headphone cable / key cable
- TX: 0.01, 0.1 W, optional 0.5 or 2 W
- RX: direct conversion (electronic 100 Hz steps or less)
### user interface
- mechanical off/volume knob
- buttons: MENU, ESC, ENTER, +, -, A, Z, (RESET)
- output by side tone, Morse code
- headphone jack, loudspeaker optional (low sound quality ok)
- direct keying, elbug optional (selected by plug type)
- 8 buttons: MENU, ESC, ENTER, +, -, A, Z, (RESET)
- output by side tone in Morse code, default speed 20 wpm
- LED optional (blinking with side tone)
- 2 headphone jacks, optionally one with deactivated loudspeaker (low sound quality ok)
- direct keying, elbug optional (perhaps selected by plug type)
#### button functions outside of settings
button press generates side tone, higher pitch when long
button press generates side tone, higher pitch when long press detected
- MENU: settings (short), default store (long)
- ESC: status report (short), default recall (long)
- ENTER: transmit key
- +, -: freq change (increasing step size when long press, indicated by increasing side tone pitch)
- A, Z: memory recall (short), memory store (long)
- (RESET): hidden button, factory defaults
- MENU: settings (short) / default store (long)
- ESC: status report (short) / default recall (long)
- ENTER: transmit (short or long)
- +, -: freq change (increasing step size when long press, indicated by increasing side tone pitch) with reporting of changed digits in case of increased step size
- A, Z: memory recall (short) / memory store (long)
- (RESET): hidden button for factory defaults (long)
status report: RX/TX freq (kHz abbreviated in range limits)
status report: RX/TX freq (abbreviated inside range limits), battery level
#### settings
- while in settings, short beep every 2 sec
- acknowledge by
- while idle in settings, short beep every 2 sec
##### buttons
- MENU: tell current item (short), store and exit (long)
- ESC: leave current menu (short), abandon and exit (long)
- MENU: tell current item (short) / save and exit (long)
- ESC: leave current menu (short) / abandon and exit (long)
- +, -: change
- ENTER: select current item
- A: yes/set/all/max.value
- Z: no/clear/zero/min.value
##### items
- power level
- squelch level
- receive offset (active after transmission, always zero during scanning)
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