R&S SM300 - Operation

Operation R&S SM300
Version 04 88
Service Manual SM300: 1147.1652.00 Instrument Part No SM300: 1147.1498.03
3.3 Operation
Figure 3-1 shows the calibration scheme for the R&S SM300 reference oscillator.
Tuning the
reference
oscillator
The 10 MHz reference oscillator is tuned by the voltage from the potentiometer.
The wiper of this potentiometer is controlled by an 8-bit register. Therefore, the
value of this register can vary from 0 to 255. This register is set during booting
from the EEPROM –
BaugruppenData block Id 10300. The register can be set
directly by the USB.
Modify wiper
control register
The R&S SM300 reference calibration software allows the user to modify the
wiper control register (path
A in Figure 3-1) with the Actual Calibration Value
text window.
1. Modify the value directly or by moving the arrows beside the text window. The
value is immediately sent to the device after it is changed.
2. Monitor the output frequency of the R&S SM300 (Ref Out BNC connector on
the rear panel) with the frequency counter.
3. When the desired frequency is reached: You can send the current value to
the EEPROM with the button
Store to EEPROM.