I
-
Test Descriptions
Carrier-to-Noise Ratio Test Description
16:58:12
DEC 06, 1993
&
CHANNEL
m
(STD)
REF 5,7
dBmV
#AT 20
dB
NKR 69.490 MHz
-30.03 dBmV
GTPOS
LOG
- :FCC
MEASUREMENT
RnNC'E
(4
MHz)
;
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..~........~........
. .
VA
WE
SC FC
*OUTER
MARKERS DEFINE
nClU!L
;
NOISE INTEGRATION RANGE
CDRR. . . . . .
;...
:
#KNOB
CONTROL5 CENTER OF RANGE
:
,,
.
...,:
,......,
:,
I
; : :
CENTER 68.740 RHz
SPAN 6.888 MHZ
YRES 8W 30 kHz #UBW
3
MHz
YSWP
6.98 set
Null!
GHTE
M
OFF
AUERRGE
u
OFF
INTQRTN
RNG SET
Mot-*
HRIN
MENU
RT
Figure 8-3. Carrier-to-Noise Measurement
In channel measurement mode, pressing More MORE INFO shows the raw
data and all corrections used for this measurement.
15:38:28
JAN 25, 1995
P
REF -3.0 dBmV
#AT
10
dB
EUN
C/N CALCULATION
Uncorrected marker on
noise
!!w8
z
-
Correct to measurement
BW
(+21.25)
=
-18.23
LOG detect Noise
(t2.58)
:
-15.73
IF Noise
Equlv.
Pwr
BW
l-8.52)
=
-16.25
Analyzer Noise Correction
(-1.76)
=
-18.81
Ext Preamp Noise
Correction<-G-17)
=
-18.18
C/N
=
Carrier Level
-
Corrected Noise
29.28
-
(-18.18)
=
47.38
Total
Pauer
e
Analyzer Input
=
42.1
CW-IW
~evei
e
Analyzer
Input
=
29.2
RE-ENTER
C/N TEST
TOTL PWR
P
INPUT
START 179.744 MHz STOP 185.744
flHz
YRES BW
38
kHz YUBW 3 MHz YSWP 6.90 see
T
Figure 8-4. MORE INFO Screen
8-9
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