My Marconi 2382 spectrum analyzer has a spurious response at 94.8 MHz, which suggests the 1st LO is getting into the 2nd mixer. It's about 20 dB above the noise floor at RBW 1 KHz, independent of input attenuation. Has anyone else seen this problem on a 2382?
The vital statistics are:
1st IF = 502.6 MHz
2nd IF = 47.4 MHz
1st LO = 597.4 MHz (for f = 94.8 MHz)
2nd LO = 550 MHz (fixed)