Download Manual - Phase Matrix

3/OPERATION
ACTIVATION OF SPECIAL FUNCTIONS
CAUTION
Executing Special Function 46, 91, 92 or 93 can cause a loss of
calibration data. To prevent this from occurring, access to these
functions is blocked by an internal memory protect feature.
Attempting to access these functions with the memory protected
causes the counter to display “ERROR 53”.
Special functions can be activated through both the front panel keyboard and the GPIB interface.
To activate a special function through the keyboard, press the SPECIAL key followed by two digit
keys. To activate a special function through the GPIB interface, enter the word SPECIAL followed
by a two-digit number. Activating special functions does not alter any previously entered
parameters unless specifically stated. To terminate all previously activated special functions: press
the SPECIAL key and then the 0 key followed by the 0 key again; or, press the SPECIAL key
followed by the CLEAR DATA key. To terminate all special functions using GPIB, issue the
command SPECIAL 00.
SPECIAL FUNCTION 01 - 200 MHz Self Test
This function verifies that the count chain, gate generator, and VCO are operational.
NOTE
The front-panel TEST button provides a convenient shortcut for accessing
Special Function 01.
When this function is entered, the counter:
1. Exits the current band
2. Sets the hardware to the self-test mode
3. Sets the VCO to 400 MHz (The measurement is the VCO divided by 2.)
4. Sets the counter to take frequency measurements only
5. Starts measurement cycles
The display shows the frequency measurement results. These results are output to the GPIB
interface when frequency readings are requested. The measurement result should be 200 MHz ±1
count.
STOP/RESET
SPC INDICATOR: ON
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