B&K Precision 2658A - Manual - Manual (Page 83)

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In the following context, the antenna gain means an absolute gain.
When the antenna gain is a relative gain, it can change into an absolute gain by adding +2.15 dB.
Absolute gain [dBi] = Relative gain [dBd] + 2.15 dB
As a reference, the conversion formula to electric field strength is indicated below:
E =
√(480π 2
x Pa) / (Ga
x λ 2
))
E: Electric field strength [V/m]
Pa: Received electric power [W]
Ga: Antenna gain [times] = 10
(antenna gain [dBi] ÷ 10)
λ : Wavelength [m] = (3 Ч 10 8
) ч frequency [Hz]
26. Option
 Dipole antenna M401 to M406 Connector : N (P)
Refer to “19.4 Electric Field Strength Measurement” for the
details.
 Magnetic field probe CP-2S.
Refer to “19.5 Magnetic Field Strength Measurement” for the
details.
 USB printer With AC adaptor and one roll of paper
Refer to “23. Storage / Print of Screen Image” for the details.
 Roll printer (10 rolls) For USB printer
Specification
Frequency range : 10 MHz to 3 GHz
Space resolution : approx.0.25 mm (depending on objects)
Dimensions :
outside 12 φ ×135 mm
probe tip 2 mm(W)×1 mm(T)
Connectors : SMA(P)
Specification
Printing method : Thermal line dot method
Paper : 80 mm width thermal paper
Power source : internal : AA-sized alkaline battery (4 pcs)
external : 7.5 VDC/3 A (dedicated AC
adapter)
Dimensions : 134(W)×60(H)×180(D) mm
Weight : approx.450 g (mainframe only)