
SSR/CHS/001
17
Getting the most from the SSR/CHS/001
SMA torque setting
The recommended torque setting for the SMA connector is 0.45 Nm (0.33 foot pound-force).
Recording with the SSR/CHS/001
The SSR/CHS/001 is live on power-on; data is acquired and packetized instantly.
At any time, move the START/STOP switch to the start position to record, or move it to the stop position to stop recording. (The
START/STOP switch is a locked position switch and must be pulled away from the panel to flip.) For further details see the
Multi-
role Recorders User Guide
.
The SSR/CHS/001 stops recording when the media is full. There is a wrap-around-when-full setting to continue recording after
deleting the oldest file. You can modify this setting via SNMP. For SNMP settings see
TEC/NOT/058 - Overview of SNMP and using third
One of the optimization features of the SSR/CHS/001 is aperiodic transmission where packets are generated only if traffic has
been captured on a given bus. For example, in MIL-STD-1553 busses are asynchronous and there may be times when the traffic
rate is low. MIL-STD-1553 packets are only generated when there is a full payload of data or a timeout occurs making the
recording of MIL-STD-1553 traffic very efficient.
File format
The SSR/CHS/001 constantly generates the data to be recorded as Ethernet packets. When the START/STOP switch is in the
start position, these packets are stored in a FAT32 volume using the Wireshark PCAP file format (see the following figure).
For more information on the PCAP file format and FAT32, see
TEC/NOT/051 - Ethernet frames, Wireshark® and FAT32
.
Storage media
Use only those CompactFlash cards validated and approved for use with SSR/CHS/001s. For details of approved cards, see the
CompactFlash cards
data sheet.
Figure 3: CompactFlash card as viewed by Windows® XP
Front panel status LEDs
Two LEDs are located on the front panel of the SSR/CHS/001. The ERROR LED lights yellow when recording is not possible; the
LOGGING LED lights green when recording is taking place. For monitoring purposes, the REC_STATUS pin on the rear-
mounted I/O connector signals the status of the ERROR LED.
The absence of an active Ethernet connection is not considered an error condition which would cause the Error LED to light.