IFR COM-120C

3-18
SECTION 3
COMPOSITE
8. Modulation Source Block
Displays selected Modulation Source. Selections include GEN1 (Audio Generator
1), GEN2 (Audio Generator 2), DTMF (DTMF Tone Generator), DATA (DATA
Generator), EXT (External Modulation) and MIC (Microphone Modulation).
9. Soft Function Key Definitions
Functions are redefined with each field of the current operation screen.
10. RF Error Frequency
Displays difference in Duplex Receive RF Field (20) and received signal
frequency.
11. Power/Received Level Reading
Power Meter displays power level of signal received through T/R Connector in W.
RECEIVED LEVEL Meter displays referenced Power Level of signal received
through ANTENNA Connector in dBm.
12. SINAD/Distortion Reading
Displays selected measurement. Selections include SINAD or Distortion
Readings.
13. AF Frequency Reading
Displays Audio Frequency of demodulated signal.
14. Modulation Reading
Displays modulation reading in units of selected Demodulation Type (17).
With FM selected, Field displays DEVIATION and has reading in units of kHz.
With AM selected, Field displays MODULATION and has reading in units of %
Modulation.
With PM selected, Field displays PHASE and has reading in units of radians.
15. Tone/Data Code Field
Displays selected Tone/Data Type and decoded data.
16. IF Bandwidth
Displays selected IF Bandwidth. Selections include 15 and 300 kHz.
17. Demodulation Type
Displays selected Demodulation Type. Selections include FM, AM or PM.
18. Input Connector
Displays connector selected for input. Displays either T/R or ANT.