AN/ARC-201 Single Channel Inaccuracies

[sniporbob]

There are a variety of issues with the ARC-201 implementation for SC mode.

• All of the presets should be changeable while function set to LD.
• Display should turn off after a short period while function set to LD (timing varies depending on certain factors)
• FREQ key should be required to be pressed before clearing frequency for input.
• Display should place _ (underscore) in each digit's place during frequency input.
• Entered frequency digits should be placed on the display left justified.
• Keypad input of frequency digits should be blocked to allow typing valid frequencies only (step size 25khz).
• Taking longer than 7 seconds to press subsequent keypad buttons while entering a frequency should blank the display and clear any unfinished input.
• Display should flash once when storing a frequency or offset.
• After clearing a preset (setting frequency to 00000), display should read FILLx (x = preset number, with MAN = 0 and CUE = C) when tuning to that preset.
• Frequency offset should be enterable while function set to LD. Valid offsets should be -10, -05, 00, 05, 10.