Specifications

VX-1400 OPERATING MANUAL12
MOBILE MOUNTING
The optional MMB-92 Mobile Mounting Bracket allows quick insertion and removal of
the VX-1400 transceiver from the vehicle. Complete installation instructions are pro-
vided with the bracket.
Mobile Antenna Considerations
The VX-1400 transceiver is designed for use with any antenna system providing a 50-
Ohm resistive impedance at the desired operating frequency. While minor excursions from
the 50-Ohm specification are of no consequence, the power amplifier’s protection cir-
cuitry will begin to reduce the power output if there is more than a 50% divergence from
the specified impedance (less than 25 Ohms or greater than 100 Ohms, corresponding to
a Standing Wave Ratio (SWR) of 2.0:1). Compliance with this specification critically
depends on the range of frequencies on which operation will take place, and the design of
the antenna(s) in use.
If your mobile or marine operation requires wide frequency coverage, the optional YA-
007FG (Frequency range is 7 MHz - 30 MHz) or similar mobile whip antenna may be
used in conjunction with the optional FC-40 External Antenna Tuner. The FC-40 is de-
signed to accommodate a wide variety of whip impedances at the operating frequency,
converting these to the desired 50 ohm impedance via a sophisticated microprocessor-
controlled impedance matching circuit. The FC-40 and VX-1400 provide memory of
antenna matching settings sufficient for all channels on Memory Bank 1. In marine appli-
cations, the FC-40 is also ideal for the use with a “backstay” antenna or marine mobile
whip.
INSTALLATION
Install the ferrite core
as close to connector
as possible.
Wrap the ends of
the waterproof cap
with sealing tape to
protect against
moisture ingress.
IMPORTANT
When connecting optional
equipment, you must turn off
the transceiver.