Appendix A
This Document contains proprietary and confidential information of Ophir RF Inc.
March 28, 2023 Rev: H
2 GPIB, RS-232 AND RS-422 COMMAND SUMMARY
Table 5 lists the commands and responses available via the GPIB (IEEE-488), RS-232
and RS-422 interfaces.
Table 5. Amplifier Control Commands
Identification query. Response is “OPHIRAMP”.
Requests the current mode of the unit; returns one of the following values:
STANDBY, ALC
STANDBY, VVA
ONLINE, ALC
ONLINE, VVA
Sets the mode of the unit; the only valid values for xxx are ALC and VVA.
Places the unit into STANDBY mode.
Removes the unit from STANDBY mode.
Returns the forward power in the form ‘xx.x dBm’ where xx.x is a floating point
number
Returns the reverse power in the form ‘xx.x dBm’ where xx.x is a floating point
number
Returns the input power in the form ‘xx.x dBm’ where xx.x is a floating-point
number. If the input power detector option is not installed, the response is “Not
Available”.
Returns the current ALC set point in the form ‘xx.x dBm’ where xx.x is a
floating-point number.
Sets the current ALC set point. Xx.x is a floating-point value, conforming to
standard IEEE nomenclature. If the value given is invalid or out of range, no
change is made.
Returns the current VVA level in the form ‘xx.x %’ where xx.x is a floating-
point number.
Sets the current VVA level. Xx.x is a floating-point value, conforming to
standard IEEE nomenclature. If the value given is invalid, out of range, or the
unit is in ALC mode, no change is made.
Acknowledge all faults. Note that the faults might immediately occur again.
Returns any current faults in the system. The reply will consist of a string that
contains a single space (if no faults have occurred) or one or more of the
following items, concatenated together and separated by commas:
ALC Range, EXT. VSWR (Hardware shutdown), VSWR, Open shutdown (if
the open shutdown feature was purchased), Fwd Pwr, Rev Pwr, Input Pwr (if the
input detector feature was purchased), Temp, Mon 1, 2… (depends on which
monitor settings were activated/set)
Returns the current set point for the VSWR alarm in the form ‘xx.x dB’, where
xx.x is a floating-point number.
Sets the set point for the VSWR alarm. Xx.x is a floating-point value,
conforming to standard IEEE nomenclature. If the value given is invalid, out of
range, no change is made
Returns the current levels of all current and voltage monitors in the system. The
reply will consist of a string that contains a single space (if no monitors have
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