User's Manual

120 20194-102 Paragon3 – 700/800MHz User Manual

6.2.2.4 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.

6.2.2.5 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 = 1W +0/-300mW (RV502, Figure 51)