R&S ZVA8 - Aligning the Frequency Accuracy; Manual Alignment and Recording Correction Values

Alignment R&S ZVA
1177.5333.02 2.4 E-11
Aligning the Frequency Accuracy
Test equipment
Spectrum analyzer (section "Test Equipment", item 1):
Error <1x10
-9
Test setup:
Connect the spectrum analyzer to the 10-MHz reference output at the
rear of the ZVA.
ZVA settings:
Select internal reference
MENU : System: Reference Internal
Spectrum analyzer settings:
Center frequency: 10 MHz
Span: 200 Hz
Note:
Before the following measurement is performed, the ZVA must have
been switched on for at least 30 minutes to give the reference
oscillator time to warm up.
Measurement:
Measure the frequency with the spectrum analyzer:
Nominal frequency:
Model without OCXO (Option B4) 10 MHz ± 80 Hz
Model with OCXO (Option B4) 10 MHz ± 1 Hz
Alignment without Option ZVAB-B4:
 Enter Service Function 2.1.1.6.209.0x000000
 Read off the frequency, e.g. 10.000050 MHz.
 Change the right-hand segment (corresponding to bit 0 to bit 11) of the data word - e.g. to
000400 - instead of 000000.
 Read off the frequency again, e.g. 10.000010 MHz.
 Change the left-hand segment of the data word, until the counter indicates precisely
10.000000 MHz.
Alignment with Option ZVAB-B4:
 Enter Service Function 2.1.1.6.209.0x800000.
 Read off the frequency, e.g. 10.000005 MHz.
 Change the left-hand segment (corresponding to bit 12 to bit 23) of the data word - e.g. to
400000 - instead of 800000.
 Read off the frequency again, e.g. 10.000001 MHz.
 Change the left-hand segment of the data word, until the counter indicates precisely
10.000000 MHz.