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User's Manual | ACOM 04AT | Remote Automatic Antenna Tuner and Switch
8. SPECIFICATIONS
8.1. Parameters
8.1.1. Operating Frequency Range
Continuous from 1.8 to 30 and from 50 to 54 MHz, extensions and changes on request.
8.1.2. Minimum Range of the Matched Impedances (at Each of the Four Antenna Outputs)
All impedances with SWR from 1:1 to 3:1 towards 50 Ohm, any phase angle, unbalanced input and output.
For some frequencies and impedances, matching is possible at SWR above 3:1 at the
antenna output (up to 10:1), but the maximum allowed power is reduced (see Section
8.1.3 Maximum Allowed Input Power
8.1.3. Maximum Allowed Input Power
(PEP, Mean or Continuous Carrier, Without Mode Limitation)
When tuning is possible for antenna SWR above 3:1, the maximum permissible input power is reduced
gradually as per
Table 8-1 Maximum input power of the tuner as function of the antenna SWR
Table 8-1 Maximum input power of the tuner as function of the antenna SWR
SWR
1-3:1
Pin, W
1200
Table 8-1 Maximum input power of the tuner as function of the antenna SWR
Operation with antenna output SWR above 10:1 is not allowed.
8.1.4. RF Input Characteristics
Rated impedance: 50 Ohm unbalanced;
•
Input connector type: UHF/PTFE (SO-239A) - 1 pc.;
•
SWR during full tuning (basic cycle): no higher than 2:1;
•
SWR immediately after full tuning: no higher than 1.5:1 (1.3:1 typically).
•
*
When tuning is possible for SWR above 3:1
May 2021
NOTICE
).
3.5:1*
4:1*
900
700
NOTICE
.
5:1*
7:1*
500
300
S e c t i o n SPECIFICATIONS | Page 61 of 72
10:1*
200
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