Racal Instruments 1261B User Manual page 62

1261B User Manual
WHAT YOU SEE
ON THE FRONT
PANEL
·
Temp LED Green
or
"System OK"
·
·
Airflow LED Green
or
"System OK"
Racal Instruments Ó 1995
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WHAT IT MEANS
Maximum slot temperature # 75 E C
Maximum slot temperature rise #
20 E C
Module cooling fans are operating
above acceptable limit
Fan Speed $ 900 RPM (SMS units)
or
Fan Speed $ 2000 RPM (EMS units)
WHERE TO VERIFY
· J410 Pin 4 on SMS
or
J414 Pin 4 on EMS.
100mV per E C, 0 E C
corresponds to 0 V
· J410 Pin 5 on SMS
or
J414 Pin 5 on EMS.
100mV per E C, 0 E C
corresponds to 0 V
Use J410 or J414 Pin 9 or 10
as ground reference.
·
J410 Pin 6, 7, 8 on SMS
or
J414 Pin 6, 7, 8 on EMS.
2 Pulses per Revolution, TTL
Pulse Train
Use J410 or J414 Pin 9 or 10
as ground reference
Operating The 1261B 3-9