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Instrument Construction and Function Description
R&S ZVB
1145.1078.82 3.70
E-4
Testing the frequency reference board
(see
Test Equipment
)
Remove the board from the instrument.
Reinsert board and extension card.
Connect the output to be tested to the spectrum analyzer using an adapter cable and
adapter SMA-N.
Set the frequencies listed in the table.
Check signals according to following table.
Signal
Connector
Frequency
Nom. level
Setting
NA1_AD_CLK
X103
80 MHz
10 dBm ±1dB
NA2_AD_CLK
X104
80 MHz
10 dBm ±1dB
SY1_REF
X105
128 MHz
10 dBm ±1dB
SY2_REF
X106
128 MHz
10 dBm ±1dB
REF_10_OUTIN
X107
10 MHz
6 dBm ±1dB
Menu/System/Internal
Reference
The board must be replaced if the signal is more than 2 dB below the stated nominal level.
Connect the frequency reference output of the spectrum analyzer to X107 (REF_10_OUTIN) using
an adapter cable and adapter SMA-N.
Connect X105 or X106 (SY1_REF or. SY2_REF) to the spectrum analyzer using an adapter cable
and adapter R&S SMA-N.
The 128 MHz signal’s frequency must precisely equal its nominal frequency.
If the frequency differs in any way (e.g. 128.001 MHz), replace the board.
Summary of Contents for ZVB 14
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