User Manual

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USERS MANUAL

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Document number Revision

4/198 17-LXE 108 566 Uen PA6

2.8.2 RF Output Power

The CM52 is able to operate in several modes and different output power level.

Applications may require output power levels similar to those in a handheld cellular

phone or higher levels commonly required in rural areas. The following tables show the

nominal power provided by the CM52.

Mobile Station Power Level (dBm)

0 1 2 3 4 5 6 7

Class I, AMPS

34.8 31 26.3 24 20 16 12 8

Class III, AMPS

26.3 26.3 26.3 24 20 16 12 8

Table 16: Mobile Station Nominal Analog Power Levels

Note: These numbers represent the Nominal Output Power

in AMPS mode and are

referenced to the antenna connector. Analog output power levels are as defined for a

Power Class I device in Industry Specification EIA/TIA IS-91.

Mobile Station Power Level (dBm)

Lower Limit Upper Limit

Class III, CDMA Band Class 0

23 dBm (0.2 Watts) 30 dBm (1.0 Watts)

Class II, CDMA Band Class 1

23 dBm (0.2 Watts) 30 dBm (1.0 Watts)

Table 17: Mobile Station CDMA Maximum Output Power

2.8.3 Carrier Approval

The CM52 will undergo carrier qualification. Approval of the CM52 is sought referenced

to the antenna connector. Any applications intending to use the CM52 will likely be

required to undergo similar testing with the CM52 integrated into the application. For

this reason it is strongly recommended that the application is designed to accommodate

exposing the antenna connector(s) of the CM52. This will help insure that the

qualification of the application with the carrier will be successful.

2.8.4 Antenna Diagnostics

The antenna diagnostics function consists of one antenna detection circuit per RF

connector. Each detection circuit can support antenna resistance (RL) values of 1 K

to 20 K and 49.9 K. Internal resistance (R) value is either 10 K or 49.9 K, as

required by the customer’s application.

AT commands are provided to query the status, query the limits and set the limits for

the status: GOOD, OPEN, or SHORTED. These commands are detailed in the CM52

Software User’s Guide and AT Command.

The drawing below is a high level description of the antenna diagnostics circuit.

PL0 and PL1 require VCC_AUX = 13.8V