CalAmp ITC 220 Installation Manual - page 67
ITC 220 Base Station Transceiver Installation Guide PN 133991 Rev. A
| Page 61
APPENDIX I — TRANSCEIVER TEST AND ADJUSTMENT PROCEDURES
Some of the procedures you perform to solve a problem consist of a single, simple step, such as tightening a cable
connection to fix a transmission problem. But several procedures consist of multiple steps. Multiple-step procedures
are described in this section.
I.1 REQUIRED EQUIPMENT
The tests and adjustments described in this section require service personnel to have equipment listed in the
Required
Equipment
section, as well as the skill and knowledge to use them.
Note: Base Station Transceivers come in two versions that differ only in their voltage requirements: 24 VDC or 48 VDC.
The table below describes the power supply requirements for each type.
Caution – Applying an incorrect voltage to the Base Station Transceiver can cause damage. Confirm the
voltage rating of the Transceiver and power source before applying power.
Table 10 Base Transceiver input power parameters
Parameter
24 VDC version
48 VDC version
Nominal DC Power Input Voltage
24 VDC
48 VDC
Operational range
21-27 VDC (+/–12.5%)
42-54 VDC (+/–12.5%)
Damage limit
30 VDC
60 VDC
Current draw (while transmitting
rated power)
7.5 A – typical while transmitting
into 50 Ohm load
4.0 A — typical while transmitting
into 50 Ohm load
I.2 MEASURE AND ADJUST PEAK RF POWER OUTPUT
Equipment used to measure and adjust peak RF power output
1. A power supply capable of providing:
24 VDC Base Station Transceiver: 24 VDC and a current of 11 Amperes
48 VDC Base Station Transceiver: 48 VDC and a current of 6 Amperes
2. 4 GHz spectrum analyzer that includes a DQPSK digital demodulation option
Or
1. Agilent #4417A power meter to measure peak and average power or equivalent and Agilent E9325A Peak and
Average Power Sensor –65 to +20 dBm or equivalent
2. 10 MHz signal reference
3. 60 dB of attenuation rated at 100 W