User's Guide

Page 2
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General Specification
The general specification applies to a transceiver irrespective of the selected operating mode. Separate
listings are given for AM modes, Mode 2 and Mode 3.
Frequency Range
The T6TR VHF Multimode Transceiver is available in two variants as listed below:
❑ The B6550/NB/50 that operates within the frequency band 118 to 136.975 MHz.
❑ The B65500/WB/50 that operates within the frequency band 112 to 155.975 MHz.
Frequency Selectable Band Edges
Four selectable frequency band edges are available on each model:
BE1, BE2, BE3 and BE4. Frequencies can only be selected that lie
between BE1 and BE2 inclusive or between BE3 and BE4 inclusive.
The band edge frequencies can only be set in 25 kHz increments. BE1
and BE3 both default to the lowest selectable frequency for the model
and BE2 and BE4 both default to the highest selectable frequency for
the model.
Frequency Accuracy
Better than 1ppm.
Reference Frequency Adjustment
Provision is made on the front panel to allow the 20.95 MHz reference
oscillator frequency to be adjusted. An output is provided suitable for
driving an external frequency counter.
Adjustment allows the frequency to be set to within 0.15 ppm.
Frequency Change Time
Less than 250 ms from receipt of a remote frequency change
command message.
Number of Channels
The transceiver has a multi-channel capability. 100 channels can be
stored and recalled.
Modulation Modes
AM-Voice (standard).
AM-MSK (optional).
Mode 2 (optional).
Mode 3 (optional).