VXI?Corporation F80 Especificaciones descargar pdf (Pagina 32)

Page 32 Pentek Model 6526 Operating Manual

Rev. A

2.4 Model 6526 Front Panel (continued)

2.4.5 LED Indicators

There are nine LED indicators on the front panel of the Model 6526, arranged

in a single, vertical row above the ‘C31 Serial Port connector. The subsections

below describes the conditions that these LEDs indicate.

2.4.5.1 Overload Indicator LEDs (OVLD A & B)

These red LEDs for each input channel indicate an overload on the

respective channel when illuminated. The overload detection

capabilities of each channel are controlled by the Overload Detec−

tion Control Registers (see Section 3.8.7 for further details).

2.4.5.2 Clock Signal Present LEDs (CLOCK A & B)

These green LEDs for each input channel are illuminated when a

clock signal for that input is detected. If this LED is not illumi−

nated, then no clock signal has been detected on the indicated

input, and no data from that stream can be processed.

2.4.5.3 RACEway Master LED (RACEWAY MASTER)

This green LED is illuminated on the Model 6526 that is designated

master of the RACEway interface (when the D6 bit in the RACE−

way Status Register, Section 3.5.6, is set to the logic '1' state). When

this LED is off, the Model 6526 is not acting as a RACEway master.

2.4.5.4 Sync Bus Master LED (SYNC MASTER)

This yellow LED is illuminated on the Model 6526 that is desig−

nated as sync bus master (when the D0 bit in the Sync Bus Control

should be located at one end of the Sync bus, and the device at the

opposite end must be programmed as the sync terminator (see

Section 2.4.5.5, below). When this LED is off, the 6526 is not the

sync master.

2.4.5.5 Sync Bus Terminator LED (TERM)

This yellow LED is illuminated on the Model 6526 that is desig−

nated as sync bus terminator (when the D1 bit in the Sync Bus

Control Register, see Section 3.4.2, is set to the logic '1' state). The

sync terminator should be located at one end of the Sync bus, and

the device at the opposite end must be programmed as the sync

master (see Section 2.4.5.4, above). When this LED is off, the 6526

is not the sync terminator.

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VXI?Corporation F80 Especificaciones Pagina 32