Specifications

Document 12245 Rev. I Sheet 29 of 39
There is also a Reflected Power Calibration offset setting (see 3.9.10), which the operator may use to adjust
the readings to agree with other measurement equipment. Doing so involves connecting the output to a short,
in order to produce a known and measurable reflected power signal.
3.8.12 Get Parallel Inputs (16 5C)
This message returns information about the current state of the eight Parallel I/O Inputs that are optionally
available when an RCP-2001 is connected. If Parallel I/O is not present, the message returns a “?” (3F). If
Parallel I/O is present, the following bit flag value information is returned:
01 b
PIO_INPUT_R6_ACTIVE
b
PIO_INPUT_R5_ACTIVE
b
PIO_INPUT_R4_ACTIVE
b
PIO_INPUT_R3_ACTIVE
b
PIO_INPUT_R2_ACTIVE
b
PIO_INPUT_R1_ACTIVE
01 000 0 b
PIO_INPUT_R8_ACTIVE
b
PIO_INPUT_R7_ACTIVE
01 000 000
01 b
PIO_INPUT_R6_LATCHED
b
PIO_INPUT_R5_LATCHED
b
PIO_INPUT_R4_LATCHED
b
PIO_INPUT_R3_LATCHED
b
PIO_INPUT_R2_LATCHED
b
PIO_INPUT_R1_LATCHED
01 000 0 b
PIO_INPUT_R8_LATCHED
b
PIO_INPUT_R7_LATCHED
01 000 000
The first 2 bytes contain flags that indicate whether the PIO inputs R1 through R8 are active. A 1 bit indicates
that the input is HIGH or OPEN; a 0 bit indicates that it is LOW or CLOSED.
The fourth and fifth bytes contain flags that indicate whether the PIO inputs R1 through R8 are latched. Inputs
that are not assigned any functions may be latched; however, PIO inputs that are assigned any function (see
section 3.9.6) are NOT latched. An input is considered latched if it has been high since the last time the state
was checked with Serial I/O. Each time the state is checked with Serial I/O, the latched states will be reset for
any inputs that are LOW.
The third and sixth bytes are present in this message for compatibility with earlier SSPAs but have no
meaning for SSPAs using this protocol.
3.8.13 Get Latched Analog Faults (16 5D)
This message is used to determine which current stage or power supply was the source of a fault. Although
three bytes are returned, only one bit flag applies to the SSPAs using this protocol:
01 000 000
01 000 000
01 0 b
LSUM_VOLTAGE
0 000
b
LSUM_VOLTAGE
: Voltage fault has occurred on module input supply voltage since faults were reset.
This flag is reset by a Fault Reset command (see section 3.5), if the condition that caused the fault has
cleared.
3.8.14 Get Module Measurements (16 60)
The Get Module Measurements command returns other voltage measurements made by this particular model
of amplifier. Each measurement is preceded by a two-character descriptor.
The amplifier is capable of making two internal voltage measurements: Gate Voltage (“VG”) and Regulated
RF Voltage (“VR”). Each voltage is returned as a signed analog value, measured in volts, preceded by the
descriptor.
Note that some older Antenna-Mount amplifiers were not capable of measuring the Regulated RF Voltage, in
which case the only measurement returned by this message will be the Gate Voltage.
An optional module number may be sent to the amplifier. This is to support other model amplifiers in which
there is more than one module. If this parameter is sent, it must be “1” (31); otherwise, a 3F (“?”) will be
returned.