Hardware, Installation and Configuration
2-5
NOTE
The cable SFPs should only be installed and removed with the
system containing the RCIM IV powered down. See the Installa-
tion section for ESD caution. Care should be taken to insure that
the SFP modules lock into position and that the RCIM IV is not
pushed out of its PCIe slot during the installation of the SFPs. The
fiber optic cables themselves can be installed and removed at any
time without damaging the RCIM IV.
Oscillators
1
The temperature compensated crystal oscillator (TCXO) provided with RCIM IV has an
accuracy of +/- 1.0 PPM (parts per million).
One optional oven controlled crystal oscillator (OCXO) provides a temperature stability of
+/- 10 PPB (parts per billion).
GPS Antenna
1
The GPS option on the RCIM IV includes an active GPS antenna and coaxial cable.
The antenna receives the GPS satellite signals and passes them to the receiver. The GPS
signals are spread spectrum signals in the 1575 MHz range and do not penetrate
conductive or opaque surfaces. Therefore, the antenna must be located outdoors with a
clear view of the sky.
If a different antenna or cable is used, it should match the following specifications:
•
50 Ohm impedence
•
27 dB gain
•
3.3 volt DC power max 30 ma.
External Interrupt I/O Connector
1
The external interrupt I/O connector on the RCIM IV is an industry standard 26-pin High
Density D-SUB that provides twelve shared outputs and/or inputs.
The external EXT_INOUT pins allow equipment to communicate with the RCIM via I/O
interrupts that are software selectable to be either inputs or outputs with a switchable 100
Ohm termination. The function of each pin is driven by a multiplexer that can set
individual pins to be either an input or an output. Pins set as outputs may be driven by any
of the following RCIM devices: programmable interrupt generators (PIGs), real-time
clock timers, (RTCs), edge-triggered interrupts (also known as input pins or ETIs), or
distributed interrupts (DIs). Each pin is physically wired to be both an input and an output
with the ability to disable the output gate. If no external wire is connected to an RCIM pin,
the pin can act as both an input and output simultaneously for loopback connections.
By default, pins EXT_INOUT0 through EXT_INOUT5 are configured to be both inputs
and outputs, and pins EXT_INOUT6 through EXT_INOUT11 are configured to be only
inputs. See “RCIM IV Pin Configuration” on page 3-20 for more information.
Summary of Contents for RCIM
Page 1: ...Real Time Clock and Interrupt Module RCIM User s Guide 0898007 1000 March 2021...
Page 10: ...RCIM User s Guide 1 4...
Page 32: ...RCIM User s Guide 2 22...
Page 80: ...RCIM User s Guide A 28...
Page 102: ...RCIM User s Guide C 2...