IFR COM-120C

5-29
SECTION 5
COMMON PRACTICES
o Press F5 EXEC .
o Press F6
RETURN .
o Press REC Mode Key.
o Repeat steps 8 through 16 for Receive Operation Screen.
o Press DPLX Mode Key.
o Cursor to RECEIVE field and press F1
ZOOM .
o Verify these readings:
Analyzer Level -40 dBm (
±4 dB)
AF Frequency 1000 Hz (±1 Hz)
RF Error 0.0 MHz (±30 Hz)
Deviation 3.30 kHz (± .5 kHz)
Distortion <3%
o Press DPLX Mode Key.
o Cursor to GENERATE field and press F1
ZOOM .
o Cursor to LINE field and press F6
CONFIG .
o Set filters:
DTMF/SINAD BPF,
C-MSG
SPEAKER/PHONES WB
o Press F5 EXEC .
o Press F6
RETURN .
o Cursor to Level field and press F5, SINAD=.
o Set SINAD= field to
12.0 dB .
o Press F6
RETURN .
o Press F6
S=On/Off .
o Verify RF Level settles to <-101 dBm.
o Press F6
S=On/Off .
o Disconnect everything.