Reference: Alpha 87A Commands

Power On/Off Commands

Command Description
AC Is AC power on or off?
AC ON Turns AC power on
AC OFF Turns AC power off

Set Commands

Command Description
BAND # (1-9) Sets band switch to any band one through nine
DEF Sets tune, load and frequency to default or factory settings
ENT Use with SEG command for saving data
FREQ # (in kHz) Sets up unit for this entered frequency
LOAD DOWN Adjusts load capacitor down one step
LOAD UP Adjusts load capacitor up one step
METER HV Sets multimeter to HV mode & reports value
METER IP Sets multimeter to IP mode & reports value
METER TUNE Sets multimeter to TUNE mode & reports value
MODE HIGH Sets high voltage power supply to high mode
MODE LOW Sets high voltage power supply to low mode
OPER OFF Sets to standby mode
OPER ON Sets to operate mode if ready
SEG # (1-5) Sets segment to entered value
TUNE DOWN Sets tune capacitor down one step
TUNE UP Sets tune capacitor up one step

Poll Commands

Command Description
STAT Reports unit status
PWR Reports current forward power out in watts
REFL Reports current load reflected power in watts
METER Reports current reading of the front panel multimeter
GRID Reports current grid current in mA
   
(FREQ) What frequency is the unit on or last frequency used?
(LOAD) Reports current load capacitor setting (0-100)
(MODE) Reports current HV power supply setting, HI or LO
(OPER) Reports whether in operate or standby
(SEG) Reports current segment setting
(TUNE) Reports current tune capacitor setting (0-100)

STAT Unit Status Report

Report Example Power off Example Power on
state warm-up AC AMPLIFIER IS OFF AC ON AMPLIFIER IS ON
standby, or operate: HV mode, low or high STAT STATE = OFF MODE = LOW ALPHA 87A
24-30 MHz enabled or disabled 10-METER ENABLED PANEL ENABLED VERSION UPX-X108-G
panel enabled or disabled FREQUENCY = 14000 kHz COPYRIGHT 1992
frequency last entered BAND = 5 SEGMENT = 1 ETO, INC.
band last selected TUNE = 48 LOAD = 57 POWER ON SEQUENCE
segment last used   USER
tune and load capacitor positions   3 MINUTE WARM-UP
    NOT VALID DURING WARM-UP
    ...
    MODE = HIGH
    STATE = STANDBY
    STATE = OPERATE

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