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4-10 8510C Service Quick Reference Guide
Performance Verification
Optional Swept Frequency Accuracy Check
Procedure
For 8360 Synthesizers
From the front panel or the emulator program (see kit for instructions):
1. To initiate an auto track, press the following synthesizer keys:
PRESET, USER CAL, [Tracking Menu], [Auto Track], [Proceed]
2. To initiate a sweep span calibration, press the following synthesizer keys:
PRESET, USER CAL, FREQ CAL MENU, [ONCE]
(No visual response is displayed after pressing the [ONCE] key.)
For 8340/41 Synthesizers
Run the network analyzer program.
1. To initiate an auto track, press the following synthesizer keys:
PRESET, SHIFT, PEAK
(This aligns the system tracking over the full range of frequencies (takes about 5
seconds).
For All Synthesizers
Run the network analyzer program.
1. Press the following network analyzer keys:
PARAMETER S21, FORMAT PHASE, STIMULUS MENU, [STEP]
(After several sweeps, the asterisk in the upper right-hand corner disappears.)
2. To normalize the measurement, press the following synthesizer keys:
MENUS DISPLAY, [DATA →MEMORY 2]. Wait one sweep, then press [MATH (/)] to make a
flat line from the phase-unbalanced trace.
3. To offset the center frequency by 5 MHz, press
STIMULUS CENTER and increase the
displayed value by 5 MHz.
4. To adjust the scale factor and shift the flat trace to the bottom or the top graticule
(where trace variations are about halfway above and below the last graticule), press
RESPONSE SCALE and then adjust the position with the front-panel knob.
5. To place the trace on the opposite side of the display, press
STIMULUS CENTER and
change the display frequency by −10 MHz.
6. Return the frequency to the original setting (remove 5 MHz offset), press
STIMULUS
CENTER
. The phase measurement should return to 0 °.
7. To display the difference between step and ramp mode, press
STIMULUS MENU, [RAMP],
[SWEEP TIME]
, 0.5, x1. Refer to Figure 4-3 for an example of a full band measurement at
1 MHz per division.
8. Measure the trace variation at 1 MHz per division scale, and then record the results on
the test record at the end of this procedure.