Adjustment Procedures
5-4 2715 Spectrum Analyzer Service Manual
Preparation
Remove the cabinet as follows:
1. Turn the power OFF and remove the power cord.
2. Set the instrument on its face with thefront cover installed.
3. Remove the rear cover(two T15 Torx-drive screws), two (front) top and
bottom feet (four T15 screws), three pan head screw s from the bottom rear,
and two pan head screws fromthe top rear of the instrument.
4. Pull the cover up and off.
5. Remove the plastic safety cover from overthe P owerS upply board.
After power has been applied, set instrument to CALIBRATIONMODE as
follows:
6. Press CATV/APPL8 (CATV MEASUREMENT SETUP) and 0(EXIT
CATVMEASUR EMENT MODE).
7. Next press UTIL 5 (INSTR DIAGNOSTIC/ADJUSTMENTS) and 8
(CALIBRATIONMODE).
NOTE. Step 7 exits the CATV mode and placesthe Spectrum Analyzer in a
calibration mode. Calibration mode must be used for all steps in this section.
CAUTION. Do not attach 50 Ωconnectors to the 2715 input unlessyou have
Option 50. Using 50 Ωconnectors will damage the 2715 input connector.Use
the 50 - 75 Ωmin loss pad (for non-Option 50 instruments) unless otherwise
specified.
Adjustments Requiring Flatness Correction
Note that changes to any of thefollowing adjustments require completing the
Amplitude Flatness Adjustment Procedureon Page 5 --52.
HR160 or R172 on the Log Amplifier Board (A7)
HR288 on the YIG Buffer AmplifierBoard (A17)