Aeroflex 9102 - Mode function key menus

Chapter 17 Programming Examples
Application examples
348 9102 Handheld Spectrum Analyzer Software version 5.31
Application examples
The application examples below use three subroutines which transmit
a command (Output9100), read a result (Input9100) or send a
command and read the acknowledgement (OutAck9100). These
subroutines are not printed here but available from Aeroflex on
request. The program examples are written in BASIC.
Signal monitoring Task: Permanently monitor a signal and check, if it is still present. The
signal frequency is 97.3 MHz and the signal strength is around -40
dBm.
OutAck9100 ("SENS:FREQ:CENT 97300000")' set the center to the
frequency
OutAck9100 ("SENS:FREQ:SPAN 2E06")' set span to 2 MHz
OutAck9100 ("SENS:REFL -30") ' set a sensitive ref level
OutAck9100 ("INP:ATT 10") ' set a low attenuation
OutAck9100 ("SENS:TRAC:A ACT") ' activate an normal trace
OutAck9100 ("SENS:DET:FUNC POS") ' use only positive samples
OutAck9100 ("CALC:MARK:AOFF") ' switch all markers off
OutAck9100 ("CALC:MARK:A NORM") ' activate marker A
SIG_FLAG = True
While SIG_FLAG = True
OutAck9100 ("SENS:SWE:STAT SING")' do one measurement
OutAck9100 ("CALC:MARK:A:X 97.3E06")' set marker to the signal
Output9100 ("CALC:MARK:A:Y?") ' read the signal level
Lvl = Val(Input9100())
If Lvl < -45 Then SIG_FLAG = False ' signal lost
Wend
Print "Signal disappeared!!!"