Vectronics VEC-862 - Manual

VEC-862 Instruction Manual Step Attenuator
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VEC-862 STEP ATTENUATOR
Introduction
The VEC-862 Step Attenuator is ideal for any application requiring a low power
50 ohm attenuator that operates from dc to lower UHF.
The VEC-862 Step Attenuator can be used to prevent front end overload or as an
"isolation pad" to properly terminate filters and/or preselectors. Common uses
include receive signal reduction for transmitter hunting, a standard dB reference
for S meter scale calibration, a dB change reference for antenna comparisons,
and many other low-power signal level attenuation applications.
The VEC-862 Step Attenuator provides attenuation values to 81dB in one dB
steps. The maximum power rating is 125 milliwatts (1/8 watt) and the usable
frequency range extends into the UHF range. The input and output connectors
are standard 50 ohm BNC females.
Specifications
Connectors........................................ BNC female
VSWR .............................................. <1.25:1 from dc to 170 MHz
(typically <1.1:1)
(worse case for all values of attenuation) <1.6:1 from 170 to 500 MHz (typically <1.1:1)
Bypass Loss...................................... <0.65 dB at 170 MHz
<2 at 500 MHz
Power Rating .................................... 125 milliwatts continuous
Attenuation Steps ............................. 1dB, 2dB, 3dB, 5dB, 10dB,
and (3) 20dB steps.
Attenuation Accuracy ....................... 0.2 dB or 5% of total attenuation,
whichever is greater