Agilent Technologies E8285A manual Cell SITE/TRIGGERS

Models: E8285A

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Chapter 2, Description of Connectors

Connectors

CELL SITE/TRIGGERS

This is a DB-25 connector. It provides various CDMA triggers and digital cell diagnostics.

Operating Considerations

Pins 1, 2, 3 Ground

Pin 4 - Closed Loop Power Control Ramp Down (CSD1_TRIG1) TTL, 1.8 μs positive pulse indicating ramp down beginning.

NOTE:This trigger does not align exactly with the outgoing power control bit in the RF signal. It occurs about 72 microseconds before the next 1.25 ms clock edge.

Pin 5 - Reserved (AMB_TRIG_OUT)

Pin 6 - Ground

Pin 7 - DSP TRIG IN, TTL

Pin 8 - Reserved (HDSET_TX+)

Pin 9 - Reserved (HDSET_RX+)

Pin 10 - Ground

Pin 11 - Reserved (AMB_PDC_DATA_IN

Pins 12, 13 - No connect

Pin 14 - Baseband I modulation signal (I_MOD_DRIVE)

120 mVrms, nominal into 50 ohms.

Pin 15 - Baseband Q modulation signal (Q_MOD_DRIVE) 120 mVrms, nominal into 50 ohms.

Pin 16 - Closed Loop Power Control Ramp Up (CSD1_TRIG0) TTL, 1.8 μs positive pulse indicating ramp up beginning.

NOTE:This trigger does not align exactly with the outgoing power control bit in the RF signal. It occurs about 72 microseconds from the next 1.25 ms clock edge.

Pin 17 - Reserved (CSD1_TRIG2)

TTL

Pin 18 - Reserved (DSP2_TRIG_OUT)

Pin 19 - External scope trigger input (EXT_TRIG_IN)

TTL

Pin 20 - Ground

Pin 21 - Reserved

Pin 22 - Reserved

Pin 23 - Reserved

Pin 24 - Ground

Pin 25 - No Connect

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S:\agilent\e8285\REFGUIDE\MANUAL\connectr.chp

Page 70
Image 70
Agilent Technologies E8285A manual Cell SITE/TRIGGERS