HP 8591C User Manual

Visual Carrier Frequency and Visual-to-Aural
Frequency Difference Test Description
The visual carrier frequency test measures the frequency of the visual carrier,
as well as the visual-to-aural frequency difference. In channel measurement
mode, this test is executed by pressing the FREQ ON softkey after one cycle
of a visual carrier level and visual-to-aural level difference test has been
completed.
To perform the visual carrier frequency and visual-to-aural frequency
difference test, the analyzer does the following:
1. Enables counting of the visual and aural carriers and calculates the aural
carrier difference.
2. In channel measurement mode, the frequency counter resolution can be
changed to 10 Hz without affecting measurement accuracy. Refer to the
specifications in the HP 8591C Calibration Guide.
Figure 8-2 shows the analyzer measuring the visual and aural carriers.
16:35:22 OEC 06, 1993
& CHANNEL m (STO)
CNTR 55.2608 MHz =
REf 34.6 dBmV 6 AT 10 dB
34.64 dBmV
NEXT
PEAK
CHANNEL
LOG
.: i.... : .i...
: ., .,...
..: .,......
SCRAMBLO
YES l.Q
FREQ
&I Off
WASB .
‘EO:;
LEVEL
EQ CM z
VIS =dBlV
mziihki
AUR& m dB
MAIN
MENU
CENTER 67.800 MHz
SPAN 6.008 MHz
WRES BW 300 kHz
YUBW 3 MHz
SWP 75.0 m,.c RT
Figure 8-2. Measuring the Visual Frequency and Aural Frequency Difference
8-5

HP 8591C Specifications

General

Brand	HP
Model	8591C
Category	Measuring Instruments
Language	English