Rohde & Schwarz ZVB 4 - Testing the Frequency Reference Board; Test Equipment

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.