Inspecting the PXS2

Front Panel

PXS2 Front Panel View
PXS2 - Front Panel

The front panel of the PXS2 has two connectors:

There are 9 LEDs in the front panel:

LED Description
FDX When lit, this green LED indicates a full duplex Ethernet connection has been established.
100 When lit, this green LED indicates a 100 Mbps Ethernet connection has been established.
ACT This green LED is on when a valid Ethernet connection has been established. It blinks when data is being transmitted or received.
RD0 When lit, this green LED indicates data is being received on synchronous channel 0.
TD0 When lit this green LED indicates data is being transmitted on synchronous channel 0.
SG1 and SG2 These two green LEDs are normally off. If a daughter card is installed, SG1 shows when data is being received from the daughter card and SG2 shows when data is being transmitted to the daughter card.
ST1 When this red LED is lit continuously, RedBoot is running and waiting for input. When this led is flashing, it indicates the application is in a failed state.
ST2 This green LED blinks approximately twice a second to indicate that the on-board software (either RedBoot or an application) is running.

Note: It is common in bit-synchronous operation to transmit "flags" continuously whenever the line is idle. In this case, the TD0 LED will flicker as soon as the corresponding channel is enabled.

Rear Panel

Rear Panel View
PXS2 - Rear Panel

The rear panel of the PXS2 has a 24-pin Hirosi connector labeled SYNC/ASYNC. By default, this is synchronous channel 0. This connector supports RS232 (EIA232), V.35 and EIA530 signaling as defined in Table A.4 and X.21 as defined in Table A.5.

Under software control, this connector can be attached to the PXS asynchronous port, for applications that requiere asynchronous communications. The pin assigments are the same shown in Table A.4, except for the clock signals (that do not exist in asyncrhronous communications).

Note: The PXS2 does not have a power switch. Unplug the AC power supply to powercycle it.