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5.2.6 Troubleshooting
"Comm Check Failed", "Error Transmitting", "Parallel Port
Time Out Error" and/or "Failed to communicate with the
board on LPT1" errors mean communication was
unsuccessful. Try the following:
•
Be sure to wait for yellow LED D4 on the Digital
Interface Board to go out after turning on power
before trying to capture data.
•
Be sure that the Digital Interface Board is connected
to a serial printer port and has power.
•
Be sure the proper port is selected (type
•
Ascertain that an 80MHz clock oscillator is properly
inserted into the socket at Y1 of the Digital Interface
Board. Check to see that LEDs D1 and D3 of the
Digital Interface Board are on. See the Digital
Interface Board manual for their functions.
•
Be sure cable connections are solid.
•
Be sure that the board to computer cable is not a
Null Modem one. If it is, swap the jumpers on Digital
Interface Board J8 and J10.
•
Reset the evaluation board by pressing button S1
and try again.
If there is no output from the ADC08100, perform the
following:
•
Be sure that the proper voltages and polarities are
present at Power Connector P1.
•
Be sure +3 Volts is present at TP9.
•
Be sure clock signal is present at J4 center pin.
•
Be sure there is an input signal at TP7 and that the
signal generator and input filter are of compatible
frequencies.
If the displayed waveform appears to be garbage, or if
the FFT plot shows nothing but noise with no apparent
signal:
•
Reset the evaluation board by pressing button S1
and try again.
•
Be sure clock Y1 is of the proper frequency
(100MHz) and type (ECL with output swing between
-0.6V
-1.3V).
•
Reset the board by pressing S1 and try again.
-O).
ALT
Problem Opening Comm Port" or "Error Setting Comm
State" errors mean that the comm port selected is not the
one to which the eval board is connected.
6.0 Evaluation Board Specifications
Board Size:
Power Requirements:
Clock Frequency Range:
Analog Input
Nominal Voltage:
Frequency Range
Impedance:
9
and
5" x 7" (12.7cm x 17.8 cm)
+ 5V ±5% @ 100 mA
+ 5V ±5% @ 750mA (see
Section 4.6)
- 5.2V.0 ±0.1V @ 250 mA
40 MHz to 250 MHz
(divided by 2 for the ADC)
1.6V P-P
50 kHz to 150 MHz
50 Ohms
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