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SRAM Battery-backed Memory
This memory space is used to store user setups and
user calibrations. This memory may contain project
sensitive or secure information.
NOTE
When the MG369XB is removed from a secure
environment a master reset should be executed
to completely clear this memory and replace
factory default data. Master reset instructions
for the MG369XB are given on page 3-86.
3-15 Reference Loop
Adjustments
The signal source reference loop can be calibrated to an external refer
-
ence source and the loop bandwidth can be adjusted to accommodate
various needs for an external reference input.
Reference
Oscillator
Calibration
The reference oscillator calibration function lets you
calibrate the internal 100 MHz crystal reference os-
cillator of the MG369XB using an external 10 MHz,
0 to +10 dBm reference signal.
NOTE
Before beginning calibration, always let the
MG369XB warm up for a minimum of 120
hours.
To perform a calibration of the internal reference os-
cillator, first connect the external 10 MHz reference
signal to the MG369XB rear panel 10 MHz REF IN
connector.
Next, press the System main menu key. At the
System menu display, press Cal > to access the Cal
-
ibration menu (below).
Press Reference Calibration to begin calibration.
Press < Previous to return to the System menu dis
-
play.
3-88 MG369XB OM
Reference Loop Adjustments Local (Front Panel) Operation