IFR COM-120C

6-25
SECTION 6
OPTIONS
11. Deviation/Modulation Level
Displays selected Deviation in kHz if current Modulation Type (9) is FM with range
from 0.00 to 100 kHz. Displays selected Percent Modulation if current Modulation
Type (9) is AM with range from 0.0% to 100%. Displays selected Deviation in
Radians if current Modulation Type (9) is PM with range from 0.00 to 10 Radians.
Field is not displayed if Modulation Type (9) is OFF.
12. Frequency/Code Field
If Modulation Source (8) is set for GEN1 or GEN2, displays Tone Frequency.
GEN2 Frequency is not an editable field unless Option Generator 2 is installed.
Range for GEN1 is 0.0 to 20000 Hz. If Modulation Source (8) is set for DTMF,
displays DTMF Code. Any DTMF code can be entered up to 16 characters and
other softkeys become available. If Modulation Source (8) is set for DATA, field
is blank.
13. AUDIO/DATA IN Meters
Displays selected meter for measuring audio input to AUDIO/DATA IN Connector.
Selections include Distortion, SINAD and AF LEVEL Meters. If one of these
meters is active, Deviation Meter (16), AF Frequency Meter (15), Distortion/DTMF
Meter (14) and LTR decoding are deactivated.
14. Distortion/
DTMF Meters
Displays Distortion or DTMF. If Distortion is displayed as meter, distortion of
demodulated signal is measured. If DTMF is displayed as meter, displays
decoded DTMF Code from demodulated signal.
15. AF Frequency Counter
Displays AF Frequency of demodulated signal. Field is for display only.
16. Deviation Meter
Displays Deviation for data or audio (voice) as selected by operator. If Voice is
Deviation Measurement is selected, (V) appears beside meter reading. If Data is
selected, (D) appears beside meter reading.
17. RF Error Meter
Displays frequency error of LTR Transmitter referenced to Receive RF Field (22).
Field is for display only.
18. RF Power Meter/
RF Level Meter
Displays RF Power, in Watts, applied to T/R Connector. If ANT is selected for
Input (20), RF Level Meter appears. Field is for display only.
19. Receive
Trunking Data Block
Displays data being passed from mobile radio. Refer to 6-12-3(C) for additional
information.