Rohde & Schwarz FSP3 Service Manual page 99

R&S FSP
Preparation for adjustment with frequency counter:
Test equipment:
Test setup:
R&S FSP settings:
frequency counter settings:
Note:
Measurement:
Adjustment:
R&S FSP settings:
Store value in instrument
1164.4556.82
Frequency counter (Section "Measurement Equipment", item 1):
-9
error < 1x10
frequency range up to 10 MHz
connect frequency counter to 10-MHz reference output of the R&S
FSP (rear panel)
- [SETUP : REFERENCE INT / EXT ]
toggle to internal reference (INT)
Set the necessary resolution:
model without OCXO (option R&S FSP-B4): 1 Hz
model with OCXO (option R&S FSP-B4):
Before the following measurement, the R&S FSP must warm up at
least 30 minutes to heat the reference oszillator.
measure frequency with frequency counter:
nominal frequency:
model without OCXO (option R&S FSP-B4) ........10 MHz ± 10 Hz
model with OCXO (option R&S FSP-B4) ...............10 MHz ± 1 Hz
IMPORTANT NOTE !
The following adjustment changes the frequency of the internal
reference source. Since this adjustment influences the frequency
accuracy of the R&S FSP, it is strongly recommended to perform this
adjustment only if the frequency is not within the tolerance.
- [ SETUP : SERVICE : ENTER PASSWORD : 894129 ENTER ]
- [ SETUP : SERVICE : REF FREQUENCY ]
The correction value for the reference frequency adjust will be
displayed in the data entry field. Change the value with the step
keys or spin wheel until the frequency counter reading or the
marker count reading displays a value within the tolerance.
- [ SETUP : SERVICE : SAVE CHANGES ]
Confirm message on display with ´YES´ . The correction values will
be stored in the non volatile memory of the boards.
2.7
Manual Adjustment
0.1 Hz
E-1