Tektronix 2715 Sensitivity

Performance Verification
2715 Spectrum Analyzer Service Manual 4-13
Check Sensitivity as specified in Table4--7.
1. Recall default power up settings by pressing UTIL 1 1. Select t he following
settings on the Spectrum Analyzer:
FREQUENCY 110 MHz
REFERENCE LEVEL --50 dB m
SPAN/DIV 5 MHz
RESOLUTION BW 5 MHz
VERTICAL SCALE 10 dB/
2. Set the VIDEO FILTERto 10 Hz by pressing UTIL251.
3. Enable peak detection modeby pressing DSPL 4.
4. Connect a 110 MHz, --85 dBm signal to the RF INPUT.
5. After one sweep, press MKR/∆/OFF to enable the marker.Tune the marker
away from the signal and onto thenoise. P ressMKR/∆/OFF t o enable a
second marker (thedelta marker) and position the delta marker on the signal
peak. It may be necessaryto reposition the delta marker if the signal is
drifting.
6. Check that the indicated del ta amplitude is ≥2.1 dB.
Table4 -7: Sensitivity Settings at 110 MHz
Span Res BW RefLevel
RF INPUT Level,
Preamp OFF
RF INPUT Level,
Preamp ON
5MHz 5MHz --50 dBm --85dBm --97dBm
1MHz 1MHz --50 dBm --92dBm --104dBm
200 kHz 300 kHz --50dBm --97dBm --109 dBm
100 kHz 100 kHz --60dBm --102dBm -- 1 1 4 d B m
50 kHz 30 kHz --70 dBm --107 dBm -- 11 9 dB m
20 kHz 10 kHz --70 dBm -- 1 1 2 d B m --124 dBm
10 kHz 3 kHz --70dBm -- 1 1 7 d B m --129 dBm
10 kHz 1 kHz --70dBm --122dBm --134 dBm
1 kHz 300 Hz --70 dBm --127 dBm --139dBm
7. Enable the preamplifier by pressingINPUT MENU 1 (PRE AMP), and reset
the input signal amplitude to --97 dBm.
8. Check that the readout shows the differenceamplitude to be ≥2.1 dB.
Sensitivity