ARMA-C125-CRM
18
TABLE 9
: DISCRETE INTERFACE (J3) – PIN ASSIGNMENTS
Name
Type
Pin #
Active condition
PWRON_S
output (active closed)
1
Indicates controller power is on.
RFMUT_S
output (active closed)
2
Indicates RF output is muted (i.e. off).
ALARM_S
output (active open)
3
Indicates operation at base plate temperature > 70°C but
< 80°C, or with degraded performance; caused by
internally detected alarms.
FAULT_S
output (active open)
4
Indicates major failure; operation is not possible.
Amplifier drain voltages are automatically turned off.
Caused by: base plate temperature > 80°C, drain voltage
> 13V or < 9V, drain current > maximum rated + 20%,
load VSWR > 3.0:1, or internally detected faults.
RFOUT_S
output (active closed)
5
Indicates RF output power greater than factory set
threshold. Refer to
Section 7.5
at page 33.
REMOT_S
output (active closed)
6
Indicates that the system control is via the remote
computer I/F (CIF).
DISOU_C
output (common)
7
System common.
RFENA_A
input (active closed)
8
Enables amplifier.
CIFRC_A
input (active open)
9
Enables remote computer I/F (CIF).
GAIUP_A
input (momentary closed)
10
To decrease attenuator setting. Step size: 0.1 dB.
GAIDW_A
input (momentary closed)
11
To increase attenuator setting. Step size: 0.1 dB.
AUTOS_A
input (active open)
12*
Enables automatic switch over to standby unit, upon
fault detection.
Alternate position is manual mode, for servicing.
SWTWG_A
input (momentary closed)
13*
Waveguide switch toggle action to connect either unit A
or unit B to antenna port.
GND
ground
14
Ground
DISIN_C
input (common)
15
System common.
SWTU1_S
output (active closed)
16*
Normally closed, form-C contact of the waveguide
switch, when unit A is connected to the antenna port.
SWTU2_S
output (active open)
17*
Normally open, form-C contact of the waveguide switch,
when unit A is connected to the antenna port.
SWTUS_R
output (return)
18*
Form-C contact common.
STDBY_S
output (active closed)
19*
Handshake signal indicating that the unit is in a stand-by
state. This implies that there are no faults or alarms and
that the unit is in auto mode.
