GTS/DEC/003
6
first eight parameters transmitted are dynamic counters that rollover to zero. The rest of the parameters are a fixed word (which
is 0x1234). At present, the loopback tester only generates the minor frame layout as given in the configuration.
N
OTE
:
The GTS/DEC/003 driver software is a minor frame decoder. Client software can use the SDK functions to decommutate
major frames by adding minor frame tracking logic.
Status LEDs
The GTS/DEC/003 uses LEDs as shown in the following figure to indicate the current status of the card.
N
OTE
:
The state of LEDs is undefined between power-on and the first driver access to the PCI card. Once the card is config-
ured, behavior is as shown in the following table until the PC is powered off.
Figure 2: PCI card LEDs
J1 and J2 headers
The following figure shows the selection headers on the GTS/DEC/003 card. J1 is used for PCM_IN_ANALOG(0) and J2 is used
for PCM_IN_ANALOG(1).
TABLE 9
Status LED description
LED
NAME
DESCRIPTION
1
IRIG-B
Lights when the IRIG time signal is successfully received.
2
BS(0)
Lights solid green when the bit synchronizer is in lock with an incoming data stream on channel 0.
3
DECOM(0)
Lights solid green when the decommutator is in a lock state; when not lit the decommutator is in a loss,
verify or check state.
4
PCI
Flashes green when the PCI card is operating correctly on the PCI bus.
5
Reserved
Reserved
6
Reserved
Reserved
1
2
3
4
5
6
