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Connectors
Front-Panel Connectors of the Agilent Technologies 8922M/S
10. IN/OUT DATA
(MODULATION)
(Agilent 8922M
Only)
Data Input This connector is a data input when the instrument is settable.
(See the Cell Configuration screen.) It is used to input 0.3
GMSK modulation data (if selected) to the RF generator.
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 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
11. MONITOR
(DEMODULATION
OUT)
(Agilent 8922M
Only)
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