R&S CMU Manual Adjustment
1100.4903.82 2.2 E-5
Preparing the Instrument
Opening the casing:
Note:
Remove the power plug on the R&S CMU and place the R&S
CMU onto the front handles.
Loosen the four Phillips screws at the four rear-panel feet and
take off the feet.
Pull off the instrument tube towards the top.
Locate the adjustment devices (see chapter 5, drawing
1100.0008.01 D page 3).
After performing the manual adjustment, close the casing again
in the reverse order.
If only the Option OCXO REFERENCE OSC. R&S CMU -B11/B12 is
to be adjusted, it is not necessary to open the complete tube of the
R&S CMU . The adjustment can be made from outside through the
ventilation holes using a small screwdriver (see chapter 5, drawing
1100.0008.01 D page 3).
Adjusting the + 5 VDC Reference Voltage
Preparation:
Connect the DC voltmeter test cable to the SMB plug X221 (see
chapter 5, drawing 1100.1027.01 page 1) on the motherboard.
Switch on the R&S CMU and allow it to warm up for approx. 5
minutes.
Adjustment:
Use potentiometer R120 on the REFERENCE BOARD to adjust
the measured value at the DC voltmeter to + 5.000 V ± 1 mV.
To Next Page
Loading...
Need help?
General
