4-12 Max FM Deviation Tests
Performance Verification
4-38
PN: 10370-10386 Rev. B
MG362x1A MM
Span = 250 MHz, RBW = 3 MHz, VBW = 3 MHz, Ampt / Display Range = 10 dB, Trigger = Continuous.
External Function Generator:
10 Hz, Amplitude = 2.00Vpp, Channel ON. Adjust Function Generator
amplitude so that the External DVM indicates
≥
(but as close as practical to) 0.707 Vrms.
DVM:
AC, 1Vrms range.
5.2.3MG362x1A:
Wide (unlocked) FM mode, Ext FM, DC Coupled, Sensitivity = 105 MHz/V, FM ON.
Test Procedure
1.
Set DUT and FSWP RF frequency per the following list, starting at the lowest freq:
2.6 GHz, 5 GHz, 10 GHz, 20 GHz
At each RF frequency, test max FM deviation.
2.
Wait 40 seconds for DUT frequency to settle.
3.
Set SPA marker to peak. Set SPA Marker freq to center.
4.
Set SPA Trace 1 mode = Max Hold.
5.
Wait 20 seconds for the SPA display to fill in. Then set Trace 1 mode = View.
6.
Set up the BW measurement function:
SPA: Marker Funct / N dB down value, set 3 dB.
7.
Calculate FM Deviation = (Noted value –3 MHz)/2. Record this result. If the result is < 101.19 MHz,
record “Fail” for this measurement.
8.
Set SPA trace 1 mode = Clear/Write.
9.
If current RF frequency is < 20 GHz, set DUT and SPA to next frequency from the list in
, then go
to
.
10.
If no Fails have been reported for any of the RF test frequencies, indicate “Pass” for the overall test.
11.
Exit.
Int Wide FM Max Deviation
Preliminary
Test limit = (100 MHz sales spec) + (0.135 % SPA-related uncertainty) + 1 % margin for DUT variation. Gives
Test Limit = 101.14 MHz.
Test Setup
Connect equipment as shown in
FSWP:
Tab “Spectrum”. This will close out the previous measurement window and activate the RF Spectrum
display.
Span = 250 MHz, RBW = 3 MHz, VBW = 3 MHz, Ampt / Display Range = 10 dB, Trigger = Continuous.
External Function Generator and DVM :
Not used.
MG362x1A:
Wide (unlocked) FM mode, Int FM, DC Coupled, Int FM Deviation = 105 MHz, Mod rate = 10 Hz,
FM ON.
Test Procedure
1.
Set DUT and FSWP RF frequency per the following list, starting at the lowest freq:
2.6 GHz, 5 GHz, 10 GHz, 20 GHz. At each RF frequency, test max FM deviation
2.
Wait 40 seconds for DUT frequency to settle.
3.
Set SPA marker to peak. Set SPA Marker freq to center.
4.
Set SPA Trace 1 mode = Max Hold.
Summary of Contents for Rubidium MG362 1A Series
Page 12: ...Contents 10 PN 10370 10386 Rev B MG362x1A MM ...
Page 16: ...1 9 ESD Requirements General Information 1 4 PN 10370 10386 Rev B MG362x1A MM ...
Page 30: ...2 6 RF Deck Assemblies Functional Description 2 14 PN 10370 10386 Rev B MG362x1A MM ...
Page 66: ...3 11 FM and Phase Modulation Calibration Calibration 3 36 PN 10370 10386 Rev B MG362x1A MM ...
Page 292: ...B 5 Self Test Messages Instrument Messages B 8 PN 10370 10386 Rev B MG362x1A MM ...
Page 293: ......