Anritsu Spectrum Master MS2711D Maintenance Manual page 32

25. Convert this measured value to dBc using the following formula:
Input Related Spurious Response (dBc) = [Second Harmonic Level @ 5750 MHz] + 45 dBm = _____ dBc
Specifications for this measurement are –45 dBc with –45 dBm into the first mixer.
Residual Spurious Response Test
The following test can be used to verify the combined residual spurious response of the FCN4760 Fre-
quency Converter and Spectrum Master.
e. Equipment Required:
· Anritsu 28N50-2 or SM/PL 50 ohm Termination or equivalent
f.
Procedure:
1. Connect the output of the FCN4760 to the Spectrum Master RF In port.
2. Connect the 50 ohm termination to the FCN4760 RF Input.
3. On the Spectrum Master, press and hold the
turn on the Spectrum Master. (This sets the instrument to the factory preset state.)
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
4. Press the
AMPLITUDE
5. Enter –75 and press the
6. Press the
Scale
7. Press the
BW/SWEEP
8. Press the
RBW Manual
set the resolution bandwidth to 10 kHz.
9. Press the
VBW Manual
set the video bandwidth to 3 kHz.
10. Press the
FREQ/SPAN
11. Enter and press the
4.7
12. Press the
Stop
GHz.
13. Wait till one full sweep is complete.
14. Press the
MARKER
15. Press the
Marker To Peak
16. Record the M1 amplitude reading and verify whether it is less than or equal to –90 dBm.
NOTE: If a spur with an amplitude larger than –90 dBm occurs, wait another full sweep and observe
whether the spur occurs at the same point on the second sweep. If the spur does not occur at the
same point on the second sweep, then the spur on the first sweep was not real.
28
key and the
Ref Level
key to set the Reference Level to –75 dBm.
ENTER
soft key and enter , then press
5
key and the
Bandwidth
soft key and use the Up/Down arrow key to select
soft key and use the Up/Down arrow key to select
key and the soft key.
Start
soft key to set the start frequency to 4.7 GHz.
GHz
soft key and enter , then press the
6
key and then the
M1
soft key.
key and press the
ESCAPE/CLEAR
soft key.
.
ENTER
soft key.
soft key to set the stop frequency to 6
GHz
soft key.
key to
ON/OFF
. Press to
10 kHz ENTER
and press to
3 kHz ENTER
Spectrum Master MM