4-20
4.2 Operation and features SPM-32A ... SPM-36A
4.2.1.3 SSB demodulation (DEMOD)
The instrument can demodulate SSB signals. The signals
can be monitored but cannot be measured. Telephone
channels in the CF range are demodulated to the AF range
(0.3 to 3.4 kHz), provided the instrument is tuned to the
centre of the channel
Fig. 4-3 SSB demodulation. The carrier and the USB have been
suppressed.
Setting the instrument:
• Select the input and the input impedance:
Use the keys in the group marked "Z/Ω" and shift: [*] [1],
[*] [2] or [*] [3]
---> (see section 4.2.2 on page 4-22)
• Change the receive frequency:
Use [TUNE] or [STEP]
---> (see section 4.2.3 on page 4-26)
The centre of the band is converted to 2 kHz, provided
the instrument has been tuned to the centre of the
channel. If the instrument has been tuned to the
suppressed carrier, the receive frequency must be de-
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