Tait TB8100, User Manual

Page: 193 / 254

TB8100 Service Kit User’s Manual
Power Amplifier Tests 183
Transmitter
output
The Transmitter output area displays forward and reverse power gauges, and
you can choose whether to view the values as watts or dBm. Underneath is the
VSWR .
Alarm status
If the Alarm status LED is red, there is a PA alarm and you cannot carry out the
test.
Manual
transmission
The Manual transmission area lets you configure and carry out the transmission
test.
To send a test transmission
1. If you don’t want to use the current channel configuration, specify the
frequency and power of the test transmission as follows:
a. In the Transmitter frequency box, enter a frequency or use the arrows
to increment or decrement the current frequency.
Important: Do not inadvertently transmit on a prohibited
frequency. For example, 406.0-406.100 MHz is reserved
internationally for distress beacons.
b. In the Power box, specify the RF output power that the test will run at.
The box to the right displays the equivalent power in dBm.
2. If you want to transmit an unmodulated test signal, select the Carrier only
option.
3. If you want to transmit a modulated test signal, select the Modulation on
option, and configure the modulation as follows:
a. In the Deviation box, select a maximum transmit deviation.
b. In the Modulation level box, specify what percentage of the maximum
deviation the test tone will have.
c. In the Modulation frequency box, specify the frequency of the tone
that will modulate the test signal.
4. Wait until the PA transmitter LED is gray (this means that the base station
is not busy).