Signal Descriptions
Mode Button
Board label:
Mode
Grid location:
A11
Description:
Push this button to choose which of the seven alternative signals to send out of the RF output connector. Your
current choice is identi
fi
ed by which of the seven related red LEDs is lighted.
PLL-1 Voltage
Board label:
Voltage
Grid location:
E12
Description:
This signal is the voltage on the
fi
rst PLL/VCO in the RF section of the board. It typically operates at 2.4 GHz.
Random Burst
Board label:
RND_BURST
Grid location:
C8
Description:
This signal produces bursts of 100 ns wide logic pulses every 6.6 ms. The pattern is a pseudo-random bit
sequence that repeats every 128 bursts and has a 6.32
μ
s duration.
Rare Anomaly
Board label:
RARE_ANOM
Grid location:
A10
Description:
The two less-frequent anomalies in this pulse train can show up on high waveform capture rate oscilloscopes.
A half-height runt signal occurs approximately every 838.8 ms. Use a Runt trigger to isolate the signal.
A 25 ns (narrow) pulse appears in approximately 838.8 ms. Use a Pulse Width trigger to isolate the signal.
The pulse train is a repeating group of three pulses. The three pulses are 100 ns, 200 ns, and 100 ns wide, with a 100 ns low
between each pulse. The group repeats at a 1.6
μ
s rate.
The anomaly is a group of four pulses. The four pulses are 50 ns, 25 ns (narrow), 100 ns (runt), and 100 ns wide, with a
100 ns low between each pulse, except for a 25 ns low before the narrow pulse.
Reset Button
Board label:
RESET
Grid location:
B7
Description:
Push this button to start all generated signals from a common point.
12
Tektronix MDO Demo 1 Board Instruction Manual