12-18
Module I/O Speciļ¬cations
A9 Global Test and Demod
To set up this signal for measuring, follow the same procedure as for "10.7M_IF J1(7)",
page12-15, by running the RF Diagnostics. The signal can be seen on a spectrum analyzer
or measured on an oscilloscope, see Figure 4-4 on page12-18 for a typical reading.
Figure 4-4 Typical Display
Output to Rear Panel System Bus
F_CNT J1(21)
Waveshape: Sine
Levels: 100 mV minimum, +5 dBm
Frequency: 700 kHz
Channel 1 = 1.000 volts/div Offset =-280.0 mvolts Trigger mode: Edge on positive
edge on Chan1
Timebase = 2000 ns/div Delay = 0.0000 s Trigger Levels
Ch. 1 Parameters P-P Volts = 4.625 volts Chan1 = -280.00 mvolts
Rise Time = 423.590 ns Fall Time = 423.660 ns Holdoff = 70.000 ns
Frequency = 699.580 kHz Period = 1.42943 ns
+ Width = 740.980 ns - Width = 688.450 ns
Overshoot = 0.0000 mvolts Preshoot = 62.49 mvolts
RMS Volts = 1.617 volts Duty Cycle = 51.83%