4. Enter the Pr menu and type RRRTTZ to move the starting plot range to 30 km, the plot
interval to 20 μsec, and zoom factor to x2.
5. Type 2 space characters to switch to the spectral display plot and exit the plot by
typing: q
6. In the Mz menu, setup the following:
Chan A – 0:Unused, 1:FixedFreq : 1, 2:TxWaveform: 1
FreeRunning fixed frequency : 60.00000 MHz
Output power level : 0.0 dBm
Apply pulse–to–pulse phase modulation: NO
Fixed relative phase offset : 0.000 Deg
The output frequency should match the IF previously set in Mb.
7. Connect the RVP901 TxDAC-A output to the ADC-A port of the IFD. It should be
connected directly to the IFDR SMA input connector; not through any bandpass
filter.
8. Verify the plot shows a single strong spectral line at the selected Intermediate
Frequency, and that any spurious signals are down at least 60 dB.
9. Repeat the steps 5 to 8 on the TxDAC-B output port.
10. Apply a 0 dBm SigGen waveform at the selected reference frequency (for example, 10
MHz) to the CLK IN BNC input of RVP901.
11. Verify the V command shows Tx/Clk:Okay, indicating the RVP901 DAC is locking
properly.
12. Return to the center frequency and verify that lock returns.
Checklist
Table 111 RVP901 TxDAC Stand-alone Bench Test Checklist
Task Checked OK/Not OK Remarks
Test procedure completed successfully.
Test Passed
For Customer Date:
For Vaisala Date:
RVP900 User Guide M211322EN-J
368
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