Agilent Technologies 856290216 Sampler and Sampling Oscillator Test Setup, Synthesizer Section

BNC CABLE

FREQUENCY COUNTER

TEST CABLE

A 15’J 10 1 Al&J100 Jl

sm624e

Figure 1 l-4. Sampler and Sampling Oscillator Test Setup

25.At each combination, the frequency counter should measure a sampler IF as shown in Table 11-5. (The sampling oscillator of the offset PLL tunes to the frequencies listed in the table.) If the frequency counter does not read the indicated sampler IF f10 kHz, suspect the Al5 RF assembly.

26.Reconnect W34 to A15UlOOJl and W32 to A15JlOl.

27.The First LO OUTPUT, located on the front panel, must be terminated in 50 ohms. If the YTO unlocks only with certain center frequency and span combinations, check that the termination is in place.

28.Set the spectrum analyzer C3MTEE FREq and (SPAN) to generate the unlock conditions.

29.On the spectrum analyzer press (SGLSWP).

30.Move jumper A14J23 to the TEST position.

31.Disconnect W34 from A15UlOOJl and measure the power of the signal at the end of W34.

32.If the power is less than -6.5 dBm, suspect W34, A7 SLODA, or All YTO.

33.Move jumper A14J23 to the NORM position.

1 I-12 Synthesizer Section