User Manual

Table Of Contents
RF-Orchestra!™ Transmitter Installation and Operation Maintenance
July 2000 6880493G02-C 6-85
Temperature Calibration Procedure
The temperature sensor must be calibrated in order for the readings to accurately reflect
ambient temperature. The ambient temperature sensor is used to determine the maximum
allowable output power (RF-O! derates power output from 0 to 3dB, between +45 and +60
degrees Celsius). Ambient temperature versus PA temperature is also monitored, cutting back
power when the PA temperature exceeds the ambient temperature by a certain amount (30
degrees Celsius, by default).
The following procedure calibrates the ambient temperature sensor of the paging station.
Perform this procedure when replacing the OCM or when performing the station alignment.
Required Equipment
Laptop computer with communications or terminal emulation software and a FIPS cable.
Digital thermometer (units must be in Celsius).
Temperature Sensor Calibration
1. Enable the Temperature Sensor Trace mode on the OCM using the command: a 192
SHMI 2.
2. Place the digital thermometer next to the LED’s on the OCM.
RFO FIPS: a 192 SHMI 2
RFO FIPS: RA 192
RFO FIPS:
Ambient Temp- A/D: 9c, Volt: 3.06VDC, Curr: 032C, Filt: 032C,
Thresh: 062C
Ambient Temp- A/D: 9c, Volt: 3.06VDC, Curr: 032C, Filt: 032C,
Thresh: 062C
CAUTION
When placing the independent thermometer, be careful not to touch any of the ICs, possibly
creating a short circuit.