HP 8591C User Manual page 61

Channel Measurements
Making Channel Measurements
N O T E
Spurious signals in the integration range can negatively affect the result because the power in the
spurious signal is added into the noise level. It is best to find the reason for the spurious signal and
eliminate it. But if this is not possible it is best to reduce the integration range and adjust its position
so it does not include the spurious signal.
CHANNEL
REF -4.3 dBmV
G T P O S '
LOG
. . . . . . ...'
CORR
. . . . . . . . . . . . . . . .
START 221.752
YRES BW 30 kHz
Figure 2.12. Carrier.to-Noise-Modulation and Gating On
N O T E
The
AVERAGE ON/OFF
video bandwidth. The non-gated test is done in a narrow video bandwidth so this key has less obvious
effect in this mode.
2-18
JAN 25, 1995
#AT 10 dB
FCC MEhSUREtlENT
M A R K E R S D E F I N E
CONTROLS CENTER
C/N ii MHz'> =
key defaults to ON for the gated test because it is done with a wide
MKR 225.582
-39.72
GATE
:
O F F
RANGE (4 MHz) -( INFO
RANGE
OF RANGE
MAIN
MENU
STOP 227.752
XSWP 6.96