Quantum Data 881, User Manual

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882 Video Test Instrument User Guide (Rev A.35) 77
2. Measure the TTL horizontal sync frequency with the frequency counter.
3. Divide the frequency that you expect by the frequency that you measure on the
frequency counter. For example, if you measure 99.9955782499875 kHz, when you
expect 100.000000000KHz, then divide 100.000000000 kHz by 99.9950002499875
kHz; the result is 1.0000442194553987.
4. Enter the result into the generator. This will raise all frequencies output by the generator
and make them exact. To enter the results through the front panel using the following
procedures:
5. Press the Tools key. The Tools menu appears on the generator’s display as shown
below.
6. Choose the System item by pressing the adjacent soft key. The System menu appears.
Press the - key to scroll down until the CalFactor item appears.
7. Choose the CalFactor item by pressing the adjacent soft key. The following items
appear on the generator’s display:
8. Choose the Edit Factors item by pressing the adjacent soft key. The following items
appear on the generator’s display:
a. Edit the RATC factor by pressing the soft keys adjacent to the bottom row until the
cursor appears on the digit you want to change. Press the + or - keys to adjust the
setting up or down.
b. Press the Enter ( Options ) key to save the new setting.
Alternatively, to enter the result using the command line interface, use the RATC
command. For example:
RATC 1.0000442194553987
System
Sequence
Probe
AFC
Analyzer
Reports
ImgShift
CEC
CalFactor Host
Network About
Serial Gpib
BootFrom Init
Edit-Factors
Self-Calibrate
Cal Factors
Frequency ->
RATC
<- 1.000000000