Figure 8: Variable Resistors On The Option Bg Board; Figure 9: Adjusting The Option Bg Output Offset And Gain - Tektronix SPG8000A Service Manual

Adjustment procedures
Adjust the Option BG
output offset and gain

Figure 8: Variable resistors on the Option BG board

Figure 9: Adjusting the Option BG output offset and gain

24
WARNING.
To avoid serious injury, do not touch exposed connectors or
components when operating the SPG8000A with the top cover removed.
Dangerous potentials exist at several points within the instrument.
1. Remove the top cover of the SPG8000A. (See page 53, Top cover.)
2. Locate the variable resistors on the BG circuit board. (See Figure 8.)
3. Use the 75 Ω BNC cable, BNC T connector, 75 Ω coaxial terminator, and
BNC female-to-dual banana adapter to connect the BLACK 4 connector to
the input connector on the digital multimeter. (See Figure 9.)
4. Restart the instrument in Factory mode. (See page 115, To power up in
factory mode.)
SPG8000A Master Sync / Clock Reference Generator Service Manual