Standard Horizon HX280E, Service Manual

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Specifications (HX280S)
General
Frequency Ranges : TX: 156.025 MHz - 157.425 MHz
RX: 156.050 MHz - 163.275 MHz
Channel Spacing : 25 kHz
Frequency Stability : ±5 ppm (–4 °F to +140 °F [–20 °C to +60 °C])
Emission Type : 16K0G3E
Antenna Impedance : 50
Ω
Supply Voltage : 7.4V DC, Negative Ground (Battery Terminal)
Current Consumption : 320 mA (Receive, Typical at AF MAX.)
50 mA (Standby)
1.6 A / 0.7 A (TX: 5 W / 1W)
Operating Temperature : –4 °F to +140 °F (–20 °C to +60 °C)
Case Size (W x H x D): 2.20” x 5.24” x 1.08” (56 x 133 x 27.5 mm) w/o knob & antenna
Weight (Approx.) : 10.9 oz (310 g) w/FNB-V105LI, Belt Clip, & Antenna
Transmitter
RF Power Output : 5 W / 1 W (@7.4 V )
Modulation Type : Variable Reactance
Maximum Deviation : ±5 kHz
Spurious Emission : –75 dBc typical
Microphone Impedance : 2 k
Ω
Receiver
Circuit Type : Double-Conversion Superheterodyne
Intermediate Frequencies : 1st: 21.7 MHz, 2nd: 450 kHz
Adjacent Channel Selectivity : 70 dB typical
Intermodulation : 68 dB typical
Hum & Noise Ratio : 40 dB typical
Sensitivity : 0.25 μ V for 12 dB SINAD
Selectivity : 25 kHz (–70 dB)
AF Output (Internal SP): 700 mW @16
Ω
for 10 % THD (@7.4 V)
Performance specifications are nominal, unless otherwise indicated, and are subject to change without notice.
Measured in accordance with TIA/EIA-603.
Important Note
The
HX280S
and
HX280E
was assembled using Pb (lead) free solder, based on the RoHS specification.
Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this appara-
tus. The solder stated above utilizes the alloy composition required for compliance with the lead-free specification,
and any solder with the above alloy composition may be used.