IF150 Supported Commands
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IF150 Supported Commands

The IF150 Firmware supports all the original commands that the Lowe IF-150 Interface supports and also some additional ones.

More commands may be added that could be used by a driving program such as my HF150 Control Program but it is important to understand that the Lowe HF-150 Receiver will only respond to the formal Lowe commands and therefore any additional commands implemented in this IF150 Firmware will be specific to the IF150 Interface and will not sent on the output to the HF-150 Receiver.

Lowe Commands

There are four Lowe commands. FRQ, MOD, RCL and STO.

FRQ - Set Receiver Frequency - Execution Time 700ms

FRQ <value in kHz> <CR>

FRQ 1234 <CR>            
Tunes receiver to 1234 kHz

FRQ 15222.998<CR>        Tunes receiver to 15222.998 kHz
<value in kHz> range limits are from 30 to 29999.999

for .nnn values the nearest 8Hz tuning step is chosen
<CR> = carriage return

MOD - Set Receiver Mode - Execution Time 80ms

MOD <mode> <CR>

mode LSB = Lower Sideband
mode USB = Upper Sideband
mode AMN = AM narrow filter
mode AM  = AM wide filter
mode AMS = AM Synchronous double sideband (alternative for AMD)
mode AMD = AM Synchronous double sideband
mode ASF = AM Synchronous 'HiFi' mode
mode ASL = AM Synchronous lower sideband
mode ASU = AM Synchronous upper sideband

MOD LSB <CR>              Sets receiver to Lower Sideband mode

<CR> = carriage return

RCL - Recall Receiver Memory - Execution Time 230ms

RCL <memory number> <CR>

<memory number>
range limits are from 1 to 60

RCL 1 <CR>                Recalls receiver memory location 1  setting stored frequency and mode

RCL 08 <CR>               Recalls receiver memory location 8  setting stored frequency and mode

RCL 33 <CR>               Recalls receiver memory location 33 setting stored frequency and mode<CR> = carriage return

STO - Store into Receiver Memory - Execution Time 150ms

STO <memory number> <CR>

<memory number>
range limits are from 1 to 60

STO 2 <CR>                Store receiver current frequency and mode into receiver memory location 2

STO 06 <CR>               Store receiver current frequency and mode into receiver memory location 06

STO 44 <CR>               Store receiver current frequency and mode into receiver memory location 44<CR> = carriage return

IF150 Additional Commands

These are the current supported additional commands.  More may be supported in the future.

? or HELP - Returns IF150 Interface Firmware Information

? <CR>                    Returns IF150 firmware information

HELP <CR>                 Returns IF150 firmware information
<CR> = carriage return
Example response:

IF150 Control Interface   (C) N. R. Bailey 2012
Version V1.0.5P  04 Jul 2012

IDENT - Returns IF Interface Identity Information

IDENT <CR>                Returns IF150 interface identity information
<CR> = carriage return
Example response:


Command Case and Valid Characters

The interface accepts the following characters/controls in the commands and arguments sent to the interface:
Letters   'a' to 'z' (ASCII 97 to ASCII 122)
Letters   'A' to 'Z' (ASCII 65 to ASCII 90)
Numbers   '0' to '9' (ASCII 48 to ASCII 57)
Symbols   '.'        (ASCII 46) (decimal point, period)
Controls  <CR>       (ASCII 13) (carriage return) (command terminator)
Controls  <ESC>      (ASCII 27) (escape)(cancels and pending command and clears input buffer)
Controls  <space>    (ASCII 32) (space) (accepted but ignored)
FRQ 12345.678 <CR> will be processed the same as  FrQ12345.678<CR>
moD Usb <CR>      
will be processed the same as  MOD uSb<CR>

All other characters and control characters will result in an error condition.
General Notes:
  1. upper, lower and mixed case is accepted
  2. spaces are ignored
  3. carriage return (ASCII code 13) terminates command
  4. escape character (ASCII code 27) will cancel any pending command and clear input buffer
  5. longest accepted command with spaces is FRQ 12345.678 CR i.e. 15 characters

Command Processing and Error Indication

The interface supports a status LED.  The LED has three states and indications:
  1. LED OFF - the interface is idle and awaiting a command
  2. LED ON for limited time - the interface is active processing the command sent to it.  The command is validated then the command is executed.  The LED will turn OFF after the command has been successfully executed
  3. LED ON permanently - this indicates one of two states:
If the LED is permanently ON due to an invalid command/data then as soon as the next valid command is received and processed the LED will turn off.  If a valid command does not result in the LED turning OFF then the interface has most probably crashed.  In this case try a valid command again and if the problem persists then you will have to power cycle and reset the interface by disconnecting and reconnecting the USB lead to the interface.

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