4-6
4.1 Overview SPM-32A ... SPM-36A
• "REL" can be incremented or
decremented using the up / down
keys.
Demodulates single sideband signals.
You can toggle between LSB and USB
demodulation by pressing this key. The
built-in loudspeaker can be used to listen
to the demodulated signal.
• It is a good idea to select the
3.1 kHz filter and to tune to the
centre of the bandwidth
• The volume can be adjusted with
the up / down keys.
"MAX.HOLD": displays the max. level
reached by keyed signals (carrier
telegraphy)
SCALE
"EXPAND": expands bargraph display:
1 dB/div, 0.1 dB/DOT (on/off).
Non-expanded display 10 dB/div, 1 dB/
DOT.
"AVRG": result averaging (slow) on/off,
resolution 0.01 dB.
• Clears any entry which has not
been terminated with [ENTER]
• Cancels the shift key, [*]
DEMOD
DEMOD
*
MAX.HOLD
7
*
EXPAND
8
*
AVRG
CLEAR
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