Agilent Technologies Cell Phone S GSM Manual do Utilizador descarregar pdf (Página 60)

100

101

2-32

Making Measurements

If You Have Problems with a Measurement

Possible Solutions to

Message Line Errors

The signal processing hardware that is used to generate measurement results has to

be told when to take data samples. If the trigger to do this is misaligned with the

signal, there may be errors in the results that are displayed.

Trigger Timing A

Check if the trigger is being received.

On the MEAS SYNC screen (press to gain access), check if the

correct burst type has been defined.

Trigger Timing B

Check if the trigger is being received at the correct time.

The First Bit field (A) , see Figure 2-17 on page 2-32, on the Phase Freq: Data

Bits screen displays the time difference between when a trigger is being received

and when the first bit of a burst occurred. The time difference is only valid if

FMErrCount is 0. The timing difference can be corrected by altering the trigger

delay (B).

Figure 2-17

MEAS SYNC

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 380 381

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