Filter
Top Products
Performance Verification
2715 Spectrum Analyzer Service Manual
4-13
Check Sensitivity as specified in Table 4--7.
1. Recall default power up settings by pressing UTIL 1 1. Select the following
settings on the Spectrum Analyzer:
FREQUENCY 110 MHz
REFERENCE LEVEL --50 dBm
SPAN/DIV 5 MHz
RESOLUTION BW 5 MHz
VERTICAL SCALE 10 dB/
2. Set the VIDEO FILTER to 10 Hz by pressing UTIL251.
3. Enable peak detection mode by 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 the noise. Press MKR/∆/OFF to enable a
second marker (the delta marker) and position the delta marker on the signal
peak. It may be necessary to reposition the delta marker if the signal is
drifting.
6. Check that the indicated delta amplitude is ≥2.1 dB.
Table 4- 7: Sensitivity Set tings at 110 MHz
Span Res BW Ref Level
RF INPUT Level,
Preamp OFF
RF INPUT Level,
Preamp ON
5MHz 5MHz --50 dBm --85 dBm --97 dBm
1MHz 1MHz --50 dBm --92 dBm --104 dBm
200 kHz 300 kHz --50 dBm --97 dBm --109 dBm
100 kHz 100 kHz --60 dBm --102 dBm -- 11 4 d B m
50 kHz 30 kHz --70 dBm --107 dBm -- 11 9 d B m
20 kHz 10 kHz --70 dBm -- 11 2 d B m --124 dBm
10 kHz 3 kHz --70 dBm -- 11 7 d B m --129 dBm
10 kHz 1 kHz --70 dBm --122 dBm --134 dBm
1 kHz 300 Hz --70 dBm --127 dBm --139 dBm
7. Enable the preamplifier by pressing INPUT MENU 1 (PREAMP), and reset
the input signal amplitude to --97 dBm.
8. Check that the readout shows the difference amplitude to be ≥2.1 dB.
Sensitivit y