FCC ID: K66VX-6000L
Alignment
Vertex Standard Co., Ltd.
3
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be connected to the main antenna jack in all
procedures that call for transmission, except where specified otherwise. Correct alignment is
not possible with an antenna. After completing one step, read the following step to determine
whether the same test equipment will be required. If not, remove the test equipment (except
dummy load and wattmeter, if connected) before proceeding.
Correct alignment requires that the ambient temperature be the same as that of the
transceiver and test equipment, and that this temperature be held constant between 20 and
30 °C (68 to 86 °F). When the transceiver is brought into the shop from hot or cold air it should
be allowed some time for thermal equalization with the environment before alignment. If
possible, alignments should be made with oscillator shields and circuit boards firmly affixed
in place. Also, the test equipment must be thoroughly warmed up before beginning.
Before beginning, connect the transceiver and PC using the CT-71 programming cable as
described in the EEPROM Programming chapter, and download the EEPROM data from the
transceiver to the computer.
Store this data in a disk file so that it can be saved and retrieved later. Using the table below,
program the channel, CTCSS, and DCS alignment settings for your transceiver version.
Upload this file to the transceiver.
Note: Signal levels in dB referred to in this procedure are based on 0 dBµ = 0.5 µV (terminated circuit).
Caution: Do not connect this line to ground, and be certain that the speaker has adequate capability to
handle the audio output from the radio.
Because of the bridge audio amplifier circuit used in the radio, it is necessary to construct and use a
simple audio load test adapter as shown in the schematic diagram above, when conducting receiver
alignment steps.
3.5
φ
PLUG
Attenuated
Test Output (1/2)
2
Ω
10 W
Ground
+ 470 µF
2
Ω
10 W
AF Test Adapter Schematic
