Operating instructions

DIRECTIONAL POWER HEADS
A-10
Performance data - in conjunction with 2948B
When the Power Head is used in conjunction with the Communications Service Monitor 2948, the
performance is identical to that of the Power Head alone with the exceptions and additions given
below.
HF version UHF version
Power measurement
Resolution:
1 mW or 0.1 dB
Indication: 3 digits
Setting: Automatic ranging using 0 to 1, 0 to 3 and 0 to 10 scales
Accuracy (including errors due to
frequency response, linearity and
calibration uncertainties combined
(root of sum of squares)):
±8% (±0.003% of maximum
power of Head)
±9% (±0.01% of maximum
power of Head) at 25 to
520 MHz,
±12% (±0.01% of maximum
power of Head) at 520 to
1000 MHz
VSWR measurements
Resolution: 0.01
Indication: 3 digits and analogue display
Setting: Automatic ranging, analogue scales 1 to 2, 1 to 4 and 1 to 11