Technical data

VHF/AM RADIO FSG 2T
Appendix A
June 2014 FAV_D10048 71
A.5 Transmitter Specification
TX RF Output Power
(also during emergency
operation)
approximately 5 Watts / 50 Ω (carrier), 18 Watts PEP,
at 9 Vdc … 16.1 Vdc, -0.5 dB ... + 1,5 dB
TX Duty Cycle
1 : 4 (1 minute TX / 4 minutes RX)
Frequency Tolerance
≤ 10 ppm (-20°C ... + 55°C / -4°F ... + 131°F)
≤ 5 ppm (0°C ... + 40°C / +32°F ... + 104°F)
Modulation
Amplitude modulation, AM (7K00A3EJN)
Depth of Modulation
85% ± 2%, approx. 60-70% AM average with Voice modulation
Modulation Distortion
≤ 10%, m = 70% / 1,000 Hz
≤ 15%, m = 70% / 350 ... 3,400 Hz
Modulation Audio Frequency
Response
≤ 6 dB (+2 dB / -4 dB), 350 ... 3,400 Hz
Modulation AF Input for m = 70%
Located on the rear panel DIL
switches and potentiometers
allow proper customized
microphone type selection and
proper modulation adjustment for
each MIC input
Standard factory setting:
Mike 1: Dynamic Microphone: ≤ 1 ... 10 mV symmetrical,
sensitivity adjustable.
Mike 2: Amplified / Carbon Microphone: ≤ 80 ... 500 mV
unsymmetrical, sensitivity adjustable.
Note: One, or two identical, dynamic or Standard Carbon
microphone(s) may be used on each mike input. For
Standard Carbon microphone(s) the supply current can
be set to 2 mA, 8 mA, 10 mA, or none.
Transmit Audio Sidetone
≥ 50 mW into 300 Ω (at 9 Vdc … 16.1 Vdc supply)
average phone volume is adjustable on equipment's rear side
Carrier Noise Level
≥ 35 dB (m = 70% / 1000 Hz)
Emission of RF Energy (≤ 1 GHz)
≤ 0.25 µW (-36 dBm) / 71 dBµV / 3.54 mV / 50 Ω
≤ 25 nW (-46 dBm) / 61 dBµV / 1.12 mV / 50 Ω, from
47 ... 68, 87.5 ... 108, 162 ... 244, 328 ... 336, 470 ... 862 MHz
Emission of RF Energy (≥ 1 GHz)
≪ 1 µW / ≪ -30 dBm / ≪ 77 dBµV / ≪ 7 mV / 50 Ω
Transmitter Spectrum Mask
≥ 70 dB attenuation at 1,250 Hz modulation / m = 60%, + 10 dB
Channel Selection Time
≤ 0.1 sec
Unwanted Frequency Modulation
≤ 1.0 kHz at m = 70% / 1000 Hz
TX Intermodulation
≥ 45 dB
TX Time-Out-Timer (TOT)
After 2 minutes in continuous transmit Mode the transmitter is
disabled. The LC display flashes as time-out warning. RX now
possible.
Antenna Mismatching
VSWR ≤ 3 : 1, normal operation
At VSWR 3 : 1 the requirements for modulation distortion,
spurious and harmonics output as well as frequency stability are
met. In addition, the RF output is ≥ 40 % / ≥ 2 Watt into 50 Ω
At VSWR ≤ 5 : 1 Transmitter is still functional.