CALAMP WIRELESS NETWORKS INC. BDP3-AMP Manual Do Utilizador

120 20191-100a

Paragon-III User Manual

Multiple channels (adjusting as shown for single channel above):

T881 (700 MHz) Adjust the VCO loop to 10V using the middle frequency channel.

All channels should lie within the upper and lower limits of 16V and 3V respectively for the
T881.

Note:

Normally, the fast TX key option is installed and the synthesizer is always ener-
gized. In the case where that option was not fitted, key the transmitter by pressing
the front panel Carrier button to make the above adjustment possible.

6.2.2.3

TX Frequency Error Adjustment

1. Apply the following settings to the IFR:

Receiver mode

IFR RX frequency to match the main radio TX frequency

IF Filter set to 30KHz

Zoom the RF Error window: select 10Khz range

2. Key the transmitter by pressing the front panel TX-Key button and measure the carrier output

frequency. It should be within ±300 Hz. If it is not, adjust the TCXO (IC700) to trim to meet the
requirement, preferably within 100Hz.

6.2.2.4

Exciter Power Output

1. Apply the following settings to the IFR:

Receiver mode, Output T/R

IFR RX frequency to match the main radio TX frequency

IF Filter set to 30KHz

Select auto range in the Power reading window

Connect the coaxial cable from the IFR T/R to the Exciter output connector

2. Key the Exciter by pressing the module PTT button. The output power at the coaxial cable end

connecting to the power amplifier should be:
-

T881 = 5W +0/-300mW (RV502, Figure 24)