Visual Carrier Frequency And Visual-To-Aural Frequency Difference Test Description - 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.
OEC 06, 1993
CHANNEL
34.6
PEAK
LOG
VIS
CENTER
WRES BW 300 kHz
Figure 8-2. Measuring the Visual Frequency and Aural Frequency Difference
10
:
MHz
CNTR 55.2608 MHz
34.64
NEXT
CHANNEL
YES l.Q
MAIN
MENU
SPAN 6.008 MHz
75.0 RT
8-5