Operating instructions

DIRECTIONAL POWER HEADS
A-8
Performance data - power head only
HF version UHF version
Frequency range:
1 MHz to 50 MHz 25 MHz to 1000 MHz
Power measurement (either direction)
See Fig. A-2 See Fig. A-3
Indication range for CW: 5 mW to 400 W 5 mW to 400 W
at 25 to 520 MHz,
5 mW to 200 W
at 1000 MHz
Indication range for PEP: 1 to 400 W 1 to 400 W
at 25 to 520 MHz,
1 to 200 W
at 1000 MHz
Maximum applied PEP: 1 kW 1 kW
at 25 to 100 MHz,
200 W at 1000 MHz
CW power accuracy
The quoted figures apply when the Power Head is terminated
by a load which has a VSWR of 1.1:1 or better and within the
temperature range 18 to 26°C
Calibration at 1 W (with
harmonics <-50 dBc):
±4.7% (±0.2 dB)
at 30 MHz
±4.7% (±0.2 dB)
at 100 MHz
Flatness:
±3.6% (±0.155 dB) ±5.9% (±0.25 dB)
at 1 to 50 MHz at below 520 MHz,
±9.6% (±0.4 dB)
at 520 to 1000 MHz
Linearity, relative to 1 W:
±3.5% (±0.15 dB) 3.5% (±0.15 dB)
±0.003% of maximum power
of Head, at 10 mW to 400 W
±0.01% of maximum power of
Head
Calibration, flatness and
±7% (±0.29 dB) ±8% (±0.35 dB)
linearity combined
(root of sum of squares):
±0.003% of maximum power
of Head
±0.01% of maximum power of
Head, at 25 to 520 MHz,
±11% (±0.5 dB)
±0.01% of maximum
power of Head,
at 520 to 1000 MHz
Effect of temperature outside 18 to 26°
C on calibration, flatness and linearity:
<±0.2%/°C
(±0.008 dB/°C)
<±0.3%/°C
(±0.015 dB/°C)
at below 520 MHz,
<±0.5%/°C
(±0.02 dB/°C)
at 520 to 1000 MHz
VSWR measurement
See Fig. A-3 See Fig. A-3
VSWR indication: 1.0 to 99.9 1.0 to 99.9
VSWR accuracy at 18 to 26°C: ±12.5% for 1.1:1 to ±16% for 1.1:1 to
2:1 (typically 3%), 2:1 (typically 5%),
±15% for 2:1 to 3:1 ±20% for 2:1 to 3:1
(typically 4%) (typically 6%)