RF - Radio Frequency

The "RF" command reports on the frequency and setting of the current 1VFO, or it can be used to enter a frequency in the current VFO. If used just by itself, it will report on the settings for the 1VFO in a format like this:
<RF0482790000 ST005000 AU1 MD1 AT0>
This output is a subset of the output generated by the "MR" command.

In its second form, the "RF" command is used with parameters to change the settings of the 1VFO. The parameters that are allowed are the same is listed in this command's output. Any subset may be used. Note that if not preceded by the "RF" entry, parameters such as "ST" will change the step setting for the current VFO, not necessarily for the 1VFO.

RX - RX report (report frequency received)

This command reports the current frequency being received as well as mode information. The output depends on the mode that the radio is in. Note in the examples below that in each case, the output starts with the command that would put the radio in the proper mode to interpret the rest of the output as a valid command. The four samples list respectively: SCAN mode (MS), Search mode (SS), 2VFO mode (VF), 1VFO mode (DD). For the 2VFO mode, note that the active VFO is indicated by the use of either "VA," or "VB" to indicate the frequency, as described under the "MR" command.

Sending this command, will take the radio out of "MG," "LM," or "LC" reporting mode.

SA - Search Audio

The "SA" command reports whether the audio squelch mode is selected for the search operation, or is used to selected the audio squelch mode. If used by itself, the currently selected audio squelch mode for searching is reported as either 0 (off) or 1 (on). If used with a parameter, the parameter indicates off (0), or on (1).

SB - Search Bounds (Search Level Setting)

The "SB" command reports on the currently selected minimum signal level for searching, or is used to set this level. When used by itself, the level is reported as a single digit in the range 0-7, where 0 indicates the feature is off. When used with a parameter it must be in the range 0-7.

SC - Set Control (DS8000 descrambler setting)

The "SC" command reports on the currently selected option setting for the optional DS8000 descrambler (speech inversion), or is used to set this option. When used by itself, the setting is reported as a double digit number (hexadecimal) in the range 00-7F, where 00 indicates the feature is off. In fact, the DS8000 uses this value to select one of 4 different descrambling settings. Only the lower two bits of this value control that option, eventhough the radio remembers the full value. When used with a parameter it must be in the range 00-7F (although only 00-03 are meaningful). The display of the AR8000 will display the bottom four bits of this value (after receiving an SC command with parameter), i.e. it will display the second hexadecimal digit. Reportedly the AR5000 will report both digits.

SD - Search Delay

The "SD" command reports on the currently selected delay for searching, or is used to set the delay. When used by itself, the delay is reported as a number with one decimal in the range 0.0 - 9.9, where 0.0 indicates delay is off. When used with a parameter it must be in the same range. The decimal may be omitted if integral numbers of seconds are desired, or if two digits are entered, in which case the decimal is assumed in between the digits.

SE - Search Entry

The "SE" command is used to prefix SL, SU entries so that upper and lower frequencies can be set for the search bank.

SG - Search Go

The "SG" command switches the radio to search mode if necessary and starts the search. While searching the radio will continuously output lines whenever the squelch opens indicating signal level and frequency. See the "LC" command for more information.

SI - Switch Interface

The "SI" command is used to switch an internal accessory on or off.

SL - Search Low bound

The "SL" command must be prefixed by the "SE" command. It is used to define the lower bound for a search bank.

SM - Start Memory (Start Select Scan)

The "SM" command is used to start the radio in select scan mode.

SN - Set Number (Set Password)

The "SN" command is used to define the radio's password. The command must be followed by a four digit number defining the password. When used by itself, the current four digit password will be returned.

SO - Search Options report

The "SO" command is used to report of set the search options. It reports a single digit parameter with the following meaning: 0 (Free option if off), 1 (Free option is on).

SP - Search Period

The "SP" command is used to report on, or set the free time used when searching. The "free" time is the maximum time a squelch lock is kept before releasing it. When used by itself, this command reports a single two digit parameter with leading zero in the range 00 - 99. This is a time in seconds.

When used to set the "free" time, a two digit parameter with leading zero in the same range as described above is required.

SQ - Search Squelch operating mode

The "SQ" command is used to report the operating mode for the squelch during searching, or to set it. When used by itself, the mode is reported as a single digit with the following meaning: 0 (Not Active), 1 (Search by Level), 2 (Search by Audio), 3 (Search by Level & Audio). This is explained as assigning bit 0 the meaning of level search and bit 1 the meaning of audio search.

When used to set the operating mode, a single digit parameter must be sent, composed according to the values mentioned above.

SS - Start Search

The "SS" command switches the radio to search mode. If used just by itself, it switches the radio to search mode in the current bank. If followed by a single letter, it switches the radio into search mode with the designated bank active.

SR - Search Report

The "SR" command is used to obtain the current search settings. ### IN PROGRESS ###

ST - STep size set

The "ST" command is used to change the currently active step size. ### IN PROGRESS ###

SU - Search Upper bound

The "SU" command must be prefixed by the "SE" command. It is used to define the upper bound for a search bank. ### IN PROGRESS ###

TI - Time Interval for priority check

The "TI" command, when used by itself, reports on the current time interval for checking the priority channel, if priority mode is active. Alternatively, it is used with one parameter indicating the desired new time interval. The parameter must consist of a two digit number, with leading zero, in the range 0-19. A value of zero switches the priority function off.

TM - Text in Memory

The "TM" command, when used by itself, reports on the text tag for the current memory/scan channel. When used with a parameter, the parameter must consist of up to 7 characters defining the new text tag.

TT - Text Tag

The "TT" command, when used by itself, reports on the text tag for the current search bank. When used with a parameter, the parameter must consist of up to 7 characters defining the new text tag.

VA - Vfo A set

The "VA" command is used to report on the settings for VFO A, or it is used to alter those settings. When used by itself, the settings are reported. The format looks like this:
<VA0080000000 ST025000 AU1 MD0 AT0>

The "VA" indicates this is the setting for VFO A. Other parameters are described under the MR command.

When used to alter settings for VFO A, only the frequency can be changed. This is done by following the letters "VA" by a frequency parameter as described for "RF" under the "MR" command.

Any use of the "VA" command will also put the unit in 2VFO mode with VFO selected as the primary VFO.

VB - Vfo B set

The "VB" command is identical to the "VA" command, except that it deals with VFO B.

VF - Vfo set

The "VF" command is equivalent to either "VA" or "VB", depending on which one is the currently active VFO.

XA - Scan Audio

The XA command reports whether the audio squelch mode is selected for the scan operation, or is used to selected the audio squelch mode. If used by itself, the currently selected audio squelch mode for scanning is reported as either 0 (off) or 1 (on). If used with a parameter, the parameter indicates off (0), or on (1).

XB - Scan Bounds (Scan Level Setting)

The XB command reports on the currently selected minimum signal level for scanning, or is used to set this level. When used by itself, the level is reported as a single digit in the range 0-7, where 0 indicates the feature is off. When used with a parameter it must be in the range 0-7.

XD - Scan Delay

The XD command reports on the currently selected delay for scanning, or is used to set the delay. When used by itself, the delay is reported as a number with one decimal in the range 0.0 - 9.9, where 0.0 indicates delay is off. When used with a parameter it must be in the same range. The decimal may be omitted if integral numbers of seconds are desired, or if two digits are entered, in which case the decimal is assumed in between the digits.

XM - Scan Mode select

The "XM" command is used to report on the mode filter selection during scan, or to set that selection. When used by itself, the mode currently selected for scanning filtering is reported as a single hexadecimal digit. with the following meaning: 0 (WFM), 1 (NFM), 2 (AM), 3 (USB), 4 (LSB), 5 (CW), F (All modes).

When used to set the mode, a single hexadecimal parameter is required, composed as described above.

XO - Scan free Override

The "XO" command is used to set, or report on, the override mode for the Free scan delay setting in scan mode. Normally, the Free setting determines after how many seconds a squelch lock during scanning is released and scanning resumes. Even though this feature can be set to "off" by setting the delay to 0 seconds, the "XO" command allows temporary overruling of the Free delay, without having to set it to zero and setting it back.

When used by itself, the command reports whether scan freeing is on or off by reporting a single digit parameter with the value 0, or 1. When used to set the option, a single digit parameter is mandatory and it must have the value zero or 1.

XP - Scan Period

The "XP" command is used to report on, or set the "free" time used when scanning. The "free" time is the maximum time a squelch lock is kept before releasing it. When used by itself, this command reports a single two digit parameter with leading zero in the range 00 - 99. This is a time in seconds.

When used to set the "free" time, a two digit parameter with leading zero in the same range as described above is required.

XQ - Scan Squelch operating mode

The "XQ" command is used to report the operating mode for the squelch during scanning, or to set it. When used by itself, the mode is reported as a single digit with the following meaning: 0 (Not Active), 1 (Search by Level/SB), 2 (Search by Audio/SA), 3 (Search by Level & Audio). This is explained as assigning bit 0 the meaning of level search and bit 1 the meaning of audio search.

When used to set the operating mode, a single digit parameter must be sent, composed according to the values mentioned above.