Agilent Technologies S GSM Demod Arm, First Bit, See Also Screens Meas Sync Hopped TCH Arfcn Cntl

Models: 8922M S GSM

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Screens

 

 

Measurement Sync

 

8. Demod Arm

This field arms or disarms triggering for digital demodulation. It is identical to the

 

Demod Arm State field on the Digital Demod screen.

 

 

IMPORTANT

This field is set to Disarm whenever a measurement screen (Output RF Spectrum,

 

Phase/Frequency or Pulse) is accessed. When Demod Arm is disarmed, the

 

Agilent 8922M/S cannot display information about the uplink. When Demod Arm is

 

re-armed, the Cell Control fields that display information about the uplink will

 

resume normal operation.

 

When Demod Arm is re-armed, measurement results (DSP Analyzer, Output RF

 

 

Spectrum, Pulse) are lost.

9. First Bit

This field displays the position in time of the of the burst’s first useful bit relative to

 

the delayed measurement trigger.

 

See Also

Keys: ON/OFF, HI LIMIT, LO LIMIT, REF SET, AVG, Units

10.FM ErrCount This field displays the number of bit differences detected when comparing the demodulated data bits to the selected synchronization pattern when Sync Mode is set to Midamble. This field will display 0 if Sync Mode is set to Amplitude.

See Also

Screens: MEAS SYNC

11.Hopped TCH ARFCN Cntl

This field is used to determine the Agilent 8922M/S’s method for selecting which ARFCN to measure during a hopping TCH.

The frequency of the ARFCN selected in this field is displayed in the HopMeasFreq field on the RF Generator/RF Analyzer screen.

Choices

Auto causes the Agilent 8922M/S to make a measurement on the

 

lowest ARFCN in the hop sequence and display it in the ARFCN

 

field.

 

Specific requires that you enter an ARFCN in the field that appears

 

when Specific is chosen. Make sure this ARFCN is in an MA table

 

and the CA table (see Screens: Cell Configuration). If the specified

 

ARFCN is not in the MA table, no measurement triggers will be

 

generated and the Agilent 8922M/S will wait until the

 

measurement is disarmed.

12. Midamble

This field displays the midamble bit pattern of the Burst Type selected for bursts

 

other than user defined bursts.

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Agilent Technologies S GSM, 8922M manual Demod Arm, First Bit, See Also Screens Meas Sync Hopped TCH Arfcn Cntl, Midamble