Manual Adjustment R&S FSP
1164.4556.82 2.6 E-1
Adjusting the frequency accuracy
Preparation:
The measurement can be performed either with a signal generator at
connector RF INPUT (front of R&S FSP) at 1 GHz or at connector EXT
REF OUT (rear of R&S FSP) at 10 MHz using a frequency counter
For the adjustment, the R&S FSP must be set to internal reference.
N
ote:
The measurement at 1 GHz can be performed with a lower frequency
counter resolution in order to achieve a faster adjustment.
Preparations for adjustment with signal generator:
Test equipment:
- Signal generator (Section "Measurement Equipment", item 2):
frequency 1000 MHz
level -20 dBm
frequency accuracy <1x10
-
9
If the frequency accuracy of the signal generator is not sufficient,
adjust the frequency with a frequency counter to the correct frequency
before the adjustment.
Test setup:
connect RF output of the signal generator to RF input of the
R&S FSP
R&S FSP settings:
- [ PRESET ]
- [ FREQ : CENTER : 1 GHz ]
- [ SPAN : 0 Hz ]
- [ BW : RES BW MANUAL : 1 MHz ]
- [ AMPT : REF LEVEL : -20 dBm ]
- [ AMPT : RF ATTEN MANUAL : 10 dB ]
- [ SETUP : REFERENCE INT / EXT ]
toggle to internal reference (INT)
Note:
Before the following measurement, the FSP must warm up for at least
30 minutes to heat the reference oscillator.
Measurement:
switch on marker frequency counting:
- [ MKR : SIGNAL COUNT ]
Set the necessary resolution:
Model without OCXO (Option B4) 1 GHz ± 1 kHz
-[ MKR : NEXT : CNT RESOL 100 HZ]
Model with OCXO (Option B4) 1 GHz ± 100 Hz
-[ MKR : NEXT: CNT RESOL 10 HZ]
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