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R&S ZVB
Manual Alignment and Recording Correction Values
1145.1078.82 2.5
E-1
Aligning the Frequency Accuracy
Test equipment
Frequency counter (section "Test Equipment", item 1):
Error
<1x10
-9
Frequency range to 10 MHz
Test setup:
Connect the frequency counter to the 10-MHz reference output at the
rear of the ZVB.
ZVB settings:
Select internal reference
MENU : System: Reference Internal
Frequency counter settings:
Set the necessary resolution: 0.1 Hz
Note:
Before the following measurement is performed, the ZVB 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 frequency counter:
Nominal frequency:
Model
without
OCXO (Option B4) 10 MHz ± 1 Hz
Model
with
OCXO (Option B4) 10 MHz ± 0.3 Hz
Alignment without Option ZVAB-B4:
•
Enter Service Function 2.1.1.6.209.0x000
000
•
Read off the frequency-counter display, e.g. 10.000050 MHz.
•
Change
the
right-hand segment
(corresponding to bit 0 to bit 11) of the data word - e.g. to
000
400
- instead of 000
000
.
•
Read off the frequency counter display 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 2.1.1.6.209.0x
800
000.
•
Read off the frequency-counter display, e.g. 10.000005 MHz.
•
Change
the
left-hand segment
(corresponding to bit 12 to bit 23) of the data word - e.g. to
400
000 - instead of
800
000.
•
Read off the frequency-counter display again, e.g. 10.000001 MHz.
•
Change the left-hand segment of the data word, until the counter indicates precisely
10.000000 MHz.
Summary of Contents for ZVB 4
Page 57: ...Instrument Construction and Function Description R S ZVB 1145 1078 82 I 3 2 E 1 ...
Page 133: ...1145 1078 82 5 5 E 1 Spare Parts List Mechanical Drawings ...
Page 142: ...1145 1078 82 5 15 E 1 Block Circuit Diagram ...
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Page 153: ...1145 1078 82 5 17 E 1 Circuit diagrams ...
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