Quantum Data 881 - Manual (Page 99)

881/882 Video Test Generator User Guide (Rev A.22) 81
Adjust Frequency Function
This section describes the adjust frequency control (AFC) function.
The AFC function provides you with the ability to increase or decrease the horizontal
frequency (HRAT parameter) of the active video format in increments of 2%.
Use the following procedures to increase or decrease the frequency of the active format.
To utilize the AFC function:
1. Physically connect a monitor to the generator at any of the interfaces using a suitable
cable.
2. Press the Tools key. The Tools menu appears on the generator’s display as shown
below.
3. Choose AFC by pressing the adjacent item selection key. The following display appears
on the generator’s display.
This display enables you to increase or decrease the horizontal frequency parameter
in increments of 2% using the +/- keys.
System
Sequence
Probe
AFC
Analyzer
Reports
ImgShift
CEC
Hz Frequency Shift
-10% -----+----- +10%
^
H = 45000.000