Connectors

Front-Panel Connectors of the Agilent Technologies 8922M/S

10. IN/OUT DATA Data Input

This connector is a data input when the instrument is settable.

(MODULATION)

(See the Cell Configuration screen.) It is used to input 0.3

(Agilent 8922M

GMSK modulation data (if selected) to the RF generator.

Only)

This connector is selected when RF generator’s modulation

 

 

source GMSK field is set to Ext. This connector is connected

 

directly in parallel with FP_DATA on the SYSTEM BUS

 

connector.

NOTE

11.MONITOR (DEMODULATION OUT)

(Agilent 8922M Only)

The two inputs are directly coupled to each other. Avoid putting signals on both inputs simultaneously.

 

Data Input Requirements:

 

High drive requirement: 100 μA Setup Time: 150 ns Hold

 

Time: 0 Low drive requirement: 1.2 mA An internal differential

 

data encoder is used. Sense: TTL HIGH results in a positive

 

frequency deviation.

Data Output

IN/OUT DATA becomes a data output when Active Cell is

 

selected and Aux BCCH is set to Adjacent. To simulate an

 

adjacent cell BCCH, IN/OUT DATA and Modulation Clock can

 

be connected to an external 0.3 GMSK signal generator. The

 

channel characteristics of the auxiliary BCCH will be the same

 

as the serving cell BCCH, except that the base station Colour

 

Code (BCC) for the auxiliary BCCH is modulo 4.

 

Data Output Requirements:

 

Drive: 4 mA TTL Valid: rising edge of modulation clock

 

Termination: 50 ohms at destination Bit Rate: 13M/48 bps

See Also

Screens: Cell Configuration ( Activated, Aux BCH and

 

Serving Cell, Colour) Screens: RF Generator/RF

 

Analyzer (RF Gen) Specifications Signal Descriptions for the

 

System Bus

The monitor output is connected to the output of the audio analyzer. The same signal choices made for Audio measurements apply to this output. The same signal that goes to the Audio appears at this connector.

This connector is directly in parallel with the rear-panel MONITOR OUT connector.

The output is always active.

See Also

Screens: Audio

6-6

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Agilent Technologies S GSM, 8922M manual Modulation, Monitor Demodulation OUT