12-17
Module I/O Specifications
A9 Global Test and Demod
Figure 4-3on page 12-17 shows the expected oscilloscope reading. This signal can also
be clearly seen on a spectrum analyzer.
Figure 4-3 Expected Display
From A15 Reference Section
20M_REF_A J1(11)
Wave Shape: Sine
Frequency: 20 MHz± 1 ppm Requires Ext Ref of 1 ppm
Level: > 0 dBm (500 mVrms)
Harmonics: < -25 dBc
Spurs (> 5 kHz offsets): < -110 dBc
Channel 1 = 200.0 mvolts/div Offset = -24.00 volts Trigger mode: Edge on positive
edge on Chan1
Timebase = 10.0 ns/div Delay = 0.0000 s Trigger Levels
Ch. 1 Parameters P-P Volts = 887.5 volts Chan1 = -24.00 mvolts
Rise Time = 14.810 ns Fall Time = 16.770 ns Holdoff = 70.000 ns
Frequency = 20.2347 MHz Period = 49.420 ns
+ Width = 25.510 ns - Width = 23.880 ns
Overshoot = 0.0000 mvolts Preshoot = 50.00 mvolts
RMS Volts = 290.6 mvolts Duty Cycle = 51.67%