HF Components
How many antennas are there and what are the Tx/Rx capabilities?
5 Antennas
All antennas are Tx/Rx except HF 2
How many Transmit & Recieve Antennas does UHF have?
3 Tx
2 Rx
HF Hazard Areas
10 - feet from any point on pod or antenna wire, external aircraft skin contact, or headsets connected to external jacks.
200 - feet fuel ignition
150 - feet electro-explosive device detonation
UHF Hazard Areas
17 - feet with C3 power amplifier on.
1 - foot with C3 power amplifier disabled.
200 - feet for fueling operations.
Where is and what does the HF Antenna coupler do?
Located at each antenna and provides impedance matching between the antenna and R/T
What is the interface between ALCS and UHF C3?
C3 Baseband Control Assembly
What is the HF Frequency Range?
2.0000 - 29.9999 MHz
What needs to warm up and for how long prior to transmitting on the radios?
C3 HPA for at least 5 minutes.
What does the SIMOP Bandpass filter do?
provides highly selective filtering for Tx and Rx signals to reduce broadband noise and simultaneous operation of the HF radios.
Also attenuates harmonics and spurious emissions in the VHF/UHF spectrum.
During transmission, what determines which antenna the signal is transmitting out of?
you bruh
jk the UHF C3 Switch Matrix
How many HF channels are used and at what increments?
280,000 channels spaced at 100-Hz increments
What is UHF frequency range and what is the channel tuning increments?
225.000 to 399.975 MHz in increments of 25 kHz
What does the DC to DC converter do?
Filters & regulates 28 VDC from the MSN-1 CCU and outputs the power to HF 1,3,4, and 5 transmit audio amplifiers.
What connects UHF C3 to the Spectrum analyzer?
Link Monitor Panel
What are the HF modes of operation?
Upper sideband voice (UV)
Lower sideband voice (LV)
Upper sideband data (UD)
Lower sideband data (LD)
Amplitude modulation (AM)
Continuous wave (CW)
How does the receive antenna get switched?
RCU GUI to select and coaxial switch switches it.
Where does the HF Power Sensor get its signals from?
Side of E43 Bay 1
What three components sends signals into the Link Monitor Panel?
Baseband control assembly
C3 HPA Switch Matrix
UHF RX Antenna 10
What needs to be operating before powering equipment to prevent overheating?
How many transmit and receive presets is C3 capable of storing?
20 Transmit and 20 Receive presets