first of all what frequency band you are using if 900 then in mode select F1=880 and F2=960 and follow the steps bellow or send me your E-mail and i’ll send you full document aboutanritsu site master .
Step 1. Using the Up/Down Arrow key, select F1 (start frequency) and press ENTER. Enter the desired numerical value using the keypad or the Up/Down Arrow key. Press
ENTER when data entry is complete.
Step 2. Repeat the above for F2 (stop frequency).
Step 3. Using the Up/Down Arrow key, select RES and press ENTER. Enter the
desired numerical value using the keypad or the Up/Down Arrow key.
Press ENTER when data entry is complete.