Technical data

ASTi Telestra 4 Training Manual (Ver. 1, Rev. F)

9.7. Radios

Radios are the largest, most complex and most used components in ACE Studio. The following is

a summary list of radio features for all simulated radios.

• World Position – the x, y, z coordinates of the radio’s location.

•Frequency – defines the center of the radio tune frequency for transmit and receive.

Optionally, it can define separate transmit and receive frequencies.

• Antenna Gain – this field simulates the size and radiative efficiency of the antenna. Note

that all modeled antennae are isotropic.

•Squelch – a noise gate that only allows signals with a specified strength to filter through

and play.

• Background Noise – general noise created when using radios.

• Fill – Allows the user to select one of a set of N pre-defined radio fills as defined in a global

comm plan.

• Multiple Net Support – provides the radio with the ability to support multiple nets per a

specific fill. Nets define the following core radio characteristics:

• Multiple Modulation Type – describes the modulation parameters of the radio such as

AM, FM, SATCOM, HQ, Intercom, etc.

• Amplitude Modulation (AM) and Frequency Modulation (FM) – two primary mod-

ulations for radio operation.

• Modulation Discrimination – occurs when radios can only receive signals from radios

with the same modulation type.

• AM Mixing – when multiple signals broadcast on the same channel frequency.

• FM Capture Effect – when several FM radios are transmitting on the same frequency,

an FM receiver will only be able to receive the strongest signal.

• Sensitivity – receiver sensitivity in dB.

• Bandwidth and Bandwidth Overlap – the bandwidth is used to determine the amount

of audio noise mixed into the received audio, based on the simulated bandwidth of the

radio band. This parameter does not affect the “in tune” calculation.

• Encoding Type and Rate – defines audio encoding type (muLaw, CVSD, PCM) and

the sample rate.

• Transmit Power – indicates the transmission power of the radio (Watts / dBm)

• Automatic Gain Control (AGC) – the adjusting of the gain to appropriate levels for a

range of input signal levels.

• SATCOM Parameters – defines satellite mode parameters if applicable.