Anritsu Spectrum Master MS2722C Maintenance Manual page 34

Chapter 2 — Spectrum Analyzer Verification
6. Set the power meter to display both Channel A and Channel B. Press the Sensor key, the Cal Factor
submenu key, and then the Freq submenu key. Use the keypad to enter the value matching the
frequency of MG3692x or MG3695C as the input signal frequency, which sets the power meter to the
proper power sensor calibration factor. Repeat for Channel B. Press the System key to display the power
reading.
7. Adjust the power level of the MG3692x or MG3695C to get a reading on Sensor A that matches the test
power level in the first column of
Verification" on page
8. Record the Sensor B reading in the "Required Sensor B Reading" column of
9. Repeat Step 7 and
Sensor B readings in the second column.
Before continuing, allow a 30 minute warm-up period for the internal circuitry to stabilize.
The listed Amplitude Accuracy specifications in
verified in an environment between 20°C and 30°C after a 30 minute warm-up period. For an
instrument that is not being verified in a temperature controlled environment, but within a
Note
temperature range between –10°C and 50°C (–10°C and 40°C for MS2726C only) and after a
60 minute warm-up, add ± 1 dB to the Amplitude Accuracy specification for frequencies from
100 kHz to 32 GHz, or add ± 2 dB to the Amplitude Accuracy specification for frequencies from
32 GHz to 40 GHz.
Measuring the Unit for 50 MHz Amplitude Accuracy
1. Connect the equipment as shown in
connecting the RF In port of the MS272xC to the splitter output via the Attenuator.
Ext Ref In
(back panel)
Figure 2-4. 50 MHz Amplitude Accuracy Verification, Test Setup
MS272xC MM
Table A-9, "Characterization Chart for 50 MHz Amplitude Accuracy
A-5.
Step 8 for the other power levels in the first column of
Figure
ML2438A Power Meter
MG3692x Signal General
10 MHz
Sine Out
R
PLUS R
TESTIME RubiSource T&M
Sine wave Out AUX
1 PPS Sync
Failure
Oscillator Warmup
Oscillator Ready
Power
1 MHz 5 MHz 10 MH 5 MHz 10 MHz
10 MHz Reference
PN: 10580-00279 Rev. E
2-7 Spectrum Analyzer Absolute Amplitude Accuracy
Appendix A
2-4, disconnecting Sensor A from the Attenuator, and
Adapter
15NNF50-1.5B
Ext Ref In
1 PPS OUT
1 PPS IN
MS272xC Spectrum Master
Table A-9.
Table A-9, and record the
apply when the instrument is being
Sensor B
1870A
Power Splitter
10 dB
Attenuator
Fault
MS2722C
Spectrum Analyzer SpectrumMaster
ESC On
Off
Shift
+/-
Back
File System Mode
7 8 9
Measure Trace Limit
4 5 6
Preset Calibrate Sweep
1 2 3
0
Enter
2-15