14. Comb Generator - Agilent Technologies 8590 Series Service Manual

Making Adjustments

14. Comb Generator

14. Comb Generator
This adjustment applies to:
8592L spectrum analyzers
8593E spectrum analyzers
8596E spectrum analyzers
The output signal from the A3A1 comb generator assembly, with the
Step Recovery Diode Module (SRD) disconnected, is adjusted for
maximum peak-to-peak voltage. A3A1C5 FREQ is centered, and the
comb generator frequency is measured with a frequency counter. If the
measured frequency is not 100.000 MHz ±0.0004 MHz, A3A1L3 is
selected to bring the frequency within tolerance.
The comb generator signal is adjusted for maximum output power as
measured with a measuring receiver (used as a power meter). If the
amplitude is not +26.0 ±0.8 dBm, A3A1R6 is selected to bring the
amplitude within tolerance.
A3A1C5 FREQ is adjusted for a comb generator frequency of
100.000000 MHz ±0.000010 MHz (tolerance of ±10 Hz).
Equipment Required
Oscilloscope
Frequency counter
Measuring receiver (used as a power meter)
Power sensor, 300 MHz
Attenuator, 20 dB
Cable, SMA, 90 cm (36 in.)
Cable, BMC, 120 cm (48 in.)
Adapter, Type N (m) to SMA (f)
Adapter, Type N (f) to Type N (f)
Adapter, Type N (m) to BNC (f)
92 Chapter 2