PERFORMANCE
CHECK
Introduction
Yhis
section verifies
the
opwational prformance
of
the
7K11
to the characteristits apecifid in
the
Specifications
section. Ver~ficationof
the
electrical characteristim requires:
mphisticafed test equipment; hweuer,an inwmingaccept-
ance heck procedure isprovided inthe first fmrtion
of
this
section to heck the instrument eration. This
pocedure
will not measure specified parameters.
The
second portion
of this section provides a list
of
test
equrpment and
procedur~for measuring
the
specified pararnetws and
characteristics.
OPERATlONAL
CHECK
AND
1NSTRUME'NT
FAMILIARIZATION
This Wrtion contains a sequence
of
procedures that
checks the instrument operation
and
will help farniliar~ze
you
with the instrument operation. Bemuse the
7Kll
Calibrator and anenuator
are
very
accurate, they are
used
as
the reference for thisorwrational checkout.
Preliminary
Preparation
Perform the Preliminan/ Front Panel Setup Procedure
that isdescribed inthe Operating tnsrructions so the
system
display (amplitudeand frequencv span) is calibrated.
1.
Check
Frequency
Range
(30
MHz
to
890
MHz)
a.
Awly the
CAL
OUT
srgnal through
the
75
n,
5
112
inch cable, tothe
RF
INPUTand mnnect
the
RF
OUTPUT
to
the
Spectrum Analyzer
RF
lnwtthrough
a
50
!2
waxial
mble.
b.
Set
the
7Kll
and Spectrum Analyzer selectors
as
follows:
7K17
REFERENCE
LEVEL
+TO
dBmV
This is
M
dB
above
the
calibrator
t30
dBmV
reference level
so
harrnoniu
of
the funda-
mental will
spread
across
the
900
MHz
spectrum.)
Spectrum
Adyzsr
Center Frequency
500
MHz
Reference Level
(RF
Attmuatcx
at
0
dB)
-30
dBm
Display
MDde
TO
dBfDiv
Freq.
SpanlDii
100
MHz
Resolution
3
MHz
TimelDiv Spectrum
or
10
ms
Fig.
31.
50
MHz
mrl(ms
nCrOs
8
1000
MHz
di4.y.
c.
Check the
1000
MHz
span for
50
MHz
marksrn
out
to
900
MHz.
Marker amplrtude w~ll
decrmse
towards the
upw
end
of
the spectrum.
Sas
Fig.
3.1.
2.
Check
tho
Calibratar
Reference
Lwsl
a.
Change the Spectrum Analyzer Display
Mdeto
2
dBiDiv. Tune the Center
Frequency
to
the
50
MHz
fundamental. Unwuple the Freq SpanlDiv
from
the Reso-
lution and
open
the display to
10
MHdDiv. Resolution
shauld remain
at
3
MHz.
Change
the
7Klf
REFERENCE
LEVEL
ta
+30
dBmV.
