Testing The Installation; Voltage Standing Wave Ratio - Codan 2110 Reference Manual

Preparing the 2110 SSB Transceiver for use

Testing the installation

Following correct deployment, the station should be tested for correct operation prior to
use in the HF network.
Testing involves:
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Voltage standing wave ratio

The 2110 SSB Transceiver measures the forward and reflected powers between the
transceiver and its antenna load. To ensure correct installation, the power and SWR
assessment should be performed with the transceiver working in its normal antenna
system. Press TUNE to see the SWR, then press PTT to manually tune the antenna.
If the impedance of the antenna is equal to 50 Ω, there will be no power reflected. This is
the ideal situation, which gives an SWR reading of 1:1. An SWR equal to or lower than
2.5:1 is acceptable. If the SWR is greater than 3:1, the ALC circuitry in the transceiver
will reduce the output power. With some combinations of frequencies and antenna
design, it may not be possible to achieve the desired value on all channels.
Using SWR to test the transceiver
To test the transceiver:
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1
1
1
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measuring the SWR
carrying out station-to-station on-air testing
Select the channel with the highest operating frequency of the transceiver.
Press TUNE.
Press PTT to tune the transceiver.
If the antenna length and ground parameters are within satisfactory operating range,
tuning will be successful and the SWR reading will be less than 2:1.
Select the channel with the lowest operating frequency of the transceiver and repeat
the test.
If a particular channel frequency does not tune, check the:
• length of the antenna (for long wire antennas)
• effectiveness of the grounding system
• orientation of the antenna
Alter these slightly in an attempt to achieve better tuning.
2110 SSB Transceiver Reference Manual