115
CHAPTER 10: Calibration
10. Calibration
The SCAN-LAN VI performs four types of calibration: NVP calibration,
remote-unit calibration, performance-module calibration, impedance
calibration, resistance calibration, and main-unit calibration.
10.1 NVP Calibration
A default Nominal Velocity of Propagation (NVP) value is preselected in
the SCAN-LAN VI depending on the cable test standard selected. More
precise NVP values can be set using one of the following procedures. NVP
calibration using a section of the actual cable to be tested is the more
accurate of the two procedures.
10.1.1 U
SING A
K
NOWN
L
ENGTH OF
C
ABLE
To measure and save the NVP of a known length of cable, perform the
following steps.
1. Set dial to CAL.
2. Select NVP from the calibration menu and press CAL (F4) or ENTER.
(Press arrow keys to change the cable test standard and press SAVE
(F4) or ENTER.)
3. Connect a known length of sample cable to the SCAN-LAN VI. The
cable must be at least 50 feet (15.2 meters) long to get an accurate
measurement (longer lengths improve accuracy). Leave the far end
of the cable open.
4. Press START (F1).
5. Press DEC (F2) or INC (F3) to adjust the cable length on the display
to the known cable length.
Summary of Contents for SCAN-LAN VI
Page 2: ......
