National Semiconductor ADC08200, Instruction Manual

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JUMPER FUNCTION
PINS 1 & 2
SHORTED
PINS 2 & 3
SHORTED
If there is no output from the ADC08200, perform the
following:
JP1 Clock Select
Divide Clock
by 2
Do not Divide
Clock
•
Be sure that the proper voltages and polarities are
present at Power Connector P1 (especially the
-5.2V).
JP2 No of Mem Chips 1 Mem Chip 2 Mem Chips
•
Be sure +3 Volts is present on terminals of L1, or at
TP7.
JP7 No of Mem Chips 2 Mem Chips 1 Mem Chip
•
Be sure that R57 is mounted correctly. See
http://www.national.com/appinfo/adc/files/ADC08200-R57.pdf
.
JP8 No of Mem Chips 1 Mem Chip 2 Mem Chips
•
Be sure there is an input signal at J3 and TP1 and
that the signal source and input filter are of
compatible frequencies.
Table 1. Jumper settings.
5.2.6 Troubleshooting
•
Be sure positions JP2, JP7 and JP8 are wired.
"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:
If the displayed waveform appears to be garbage, or if
the FFT plot shows nothing but noise with no apparent
signal:
•
Be sure clock Y1 is of the proper frequency
(200MHz) and type (ECL with output swing between
-0.6V and -1.3V).
•
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 positions JP2, JP7 and JP8 are wired.
•
Be sure that the Digital Interface Board is connected
to a serial printer port and has power.
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.
•
Be sure the proper port is selected (type
ALT
-O).
•
Ascertain that an 80MHz clock oscillator is properly
inserted into the socket at Y1 of the Digital Interface
Board and that the DIP switches on the Digital
Interface Board are properly set (see the Digital
Interface Board manual). Check to see that LEDs
D1 and D3 of the Digital Interface Board are on. See
the Digital Interface Board manual for their
functions.
Inconsistent or poor performance could be caused by
reading the FIFO too fast. Reading fo the FIFO should be
done at 10 MHz. See Digital Interface Board manual for
information on setting the sampling frequency of that
board.
6.0 Evaluation Board Specifications
•
Be sure cable connections are solid.
•
Be sure that the board to computer cable is not a
Null Modem type. If it is, swap the jumpers J8 and
J10 on the Digital Interface Board.
Board Size: 4.8" x 6.0" (12.2cm x 15.2 cm)
Power Requirements: + 5V ±5% @ 3.0 mA
(see Section 4.6) + 5V ±5% @ 1 Amp
- 5.2V to -5.3V @ 250 mA
Clock Frequency Range: 10 MHz to 230 MHz
Analog Input
Nominal Voltage: 1.6VP-P
Frequency Range 50 KHz to 400 MHz
Impedance: 50 Ohms
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