Tektronix TPS2000 Series, Service Manual

Page: 56 / 106

Adjustment Procedures
5- 4
TPS2000 Series Digital Storage Oscilloscopes Service Manual
Use this procedure to load new calibration constants.
1. Enable the Service menu as described on page 5--2.
2. Push the Service option button.
3. Push the Factory Cal option button.
4. Push the Warmup Timer option button.
5.
Push the
Start Timer
option button to ensure a 10-minute warm up. After
10 minutes passes, the oscilloscope displays a large black or green cross.
6. Press the front-panel UTILITY button and push the Service option button.
7. Push the Factory Cal option button.
8. Push the FCAL INIT option button to initiate the factory calibration
routine. You are now in step 1 of the procedure.
9. As indicated by Step 1 in Table 5--2, connect a 0.0 V
DC
source to the channel
inputs.
10. Press FCAL STEP to load the calibration constant for step 1.
11. Follow the screen prompts along with Table 5--2 for the remainder of the
routine, applying the proper signal for each step.
NOTE
. During some steps, the oscilloscope may appear to be idle for several
minutes while it is processing information internally. You must wait for the
screen prompt to continue.
NOTE
. In Table 5--2, “BWL” stands for the bandwidth limit of the particular
oscilloscope. If the oscilloscope is a TPS2012 or a TPS2014, the oscilloscope
has a bandwidth limit of 100 MHz. If the oscilloscope is a TPS2024, the
bandwidth limit is 200 MHz.
If any step in the procedure fails, the procedure terminates. Failure will result
if an incorrect signal source is connected. If this happens, you must start the
procedure over from the beginning.
If the procedure completes successfully, a “Pass” message is displayed and
the new adjustment takes effect.
12. Compensate the signal path by performing the self-calibration routine.
Disconnect any probes or cables from the channel input connectors. Then,
press the
UTILITY
button and select
Do Self Cal
to confirm that you are
ready to proceed.
Adjustment Procedure