HP 416A - Page 6

Scales:
Percent Reflection (for use in reflectometer system) :
0
to 100 and 10 to 30.
SWR (for use with slotte d line) : 4 to 1 and 10 to 3.
DB : 0 to 10.
Ranges : four ranges, each scale.
Connectors - -
Input (on control panel) : REFLECTED/PROBE and INCIDENT /REFERENCE,
Type BNC.
Output (on rear plate) : OUTPUT /J3 (for oscilloscope or recorder),
Type BNC.
J4/BIAS (for barretters), binding posts, 3/4"
spacing .
Output Characteristics --
OUTPUT /J3 : Source output impedance : 100, 000 ohms .
Open circuit voltage : appr oximately 10 volts.
Short circuit current : approximately 0 . I ma .
(Input impedance of the oscilloscope or recorder should be greater than
. 50 , 000 ohms . )
J4/BIAS : Source output impedance : a pproximately 5 ohms .
Open circuit voltage : 6 . 3 volts.
Cur r ent i n t o AC - 60K transformer assembly: 17 ma. (when
input li ne voltage is 115 volts).
Short circuit c urrent : approximately I ampere.
(NEVER connect les s th a n 250 ohms across the J4/BIAS terminals.)
Power Supply Rating --
Voltage: 115 / 230 volts ± 10% .
Frequen c y : 50 / 60 cycles/sec.
Wa t tage : approxim a tely 90 watts.
Cables Furnished - =
Two Type AC - 16K c a bles , ea ch : BNC to BNC, 4-foot overall, 50 - ohm
coaxial ; for making input connections .
Optional Accessories - -
Cable : Type AC - 16D , BNC to open, 44~inch overall, 50-ohm coaxial;
for making connection to oscilloscope.
Transformer Assernbly , Type AC-60K : for use when using barretter
detectors. Includes two transformers, to match the impedance
of each barretter to that of its Model 416A input; input cables and
bias supply cable supplied. Designed for use with Sperry 821 or
Narda N - 82 l B Barretters mounted in Hewlett - Packard Model S485A
Waveguide Detector Mounts.
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