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Specification
-
494Al4g4Ap
Service,
Vol.
1
-
Tabte
2-1
(Continued)
FREOUENCY
RELATED
CHARACTERISTICS
tal
Inlormation
Characteristic
Signal
Counter
(continued)
Delta
Frequency
Accuracy
Sensitivity
Readout
Resolution
Ref
erence
Frequency
Error
Aging
Rate
Short
Term
First
six
months
After
the first
six
months
Temperature
sensitivity
Residual
FM
1st
LO lock
Refer
to
lF Frequency,
LO
Range,
and
Harmonic
Number
specification
later
in
this
table
for
the N vatue
(1x19-s
per
day
(7x10-e
per
week
Selectable
from
Hz
to
1
GHz
with
<blue-SHIFT>
COUNT
RESOLU-
TION
pushbutton.
Accuracy
during
warmup
at
+25oC
(30
qlin.
after power
on)
(1x10-7
in
first
six
months
(1x.t0-z
per year
within
5x10-8 of
the frequency
after
24 hours
Within
2x10-8
over
the instrument
operating
range
ol
-1
SoC
to
+55"C
(referenced
to
+25"C)
Short
terrn,
after
t hour warm
up
Refer
to
lF
Frequency,
LO Range,
and
Harmonic
Number
specification
later
in
this table
for
the
N value
Refer
to lF
Frequency,
LO
Range,
and
Harmonic
Number
specification
later
in
this table
for the N value
10
Hz
to 1 MHz in
decade steps,
and
MHz
Within
20"h, impacted
by
residual
FM
and
drift during sweep
time
Bands
1
&
5-12
with
SpAN/D|V
>
200
kHz,
and
Bands
2-4
with
SPAN/DIV
>100
kHz
Bands
1
&
5-12
with
SpAN/DIV
(200
kHz,
and
bands
2-4
with
SPANID|V
(100
kHz
Static
Resolution
Bandwidth
(6
dB
down)
Shape
Factor
60 dB
bandwidth
3
MHz-100
Hz
Noise
Sidebands
+tAF.
x
BEF)
+
(20
+
4N)Hz
+
1 LSD]
Where
AF:
Delta
Frequency
REF
Reference
Frequency
Error
N
:
Harmonic
Number
!9D
-
Least
Significant
Digit
Signal
level,
at
center
screen
or
at
marker,
must
be
2A
dB
or
rnore
above
the
average
noise
level
and
within
60
dB
of
the
reference
level.
((7
kHz)N
total excursion
in
20
ms
{(10+2N)Hz
total excursion
in
20
rns
Within
20/"
ot
selected
bandwidth
(150
Hz
7.5:1
or less
At
least
-70
dBc at
an offset
of
30
x
the selected
bandwidth
for
resolution
bandwidths
of
100
Hz
and 1O
Hz
At
least
-75
dBc at
an offset
of
30
x
the
selected
bandwidth
for all
other
bandwidths
2-3