TB 9-6625-103-24
harmonic and verify the spectrum analyzer indication is within limits listed in table 9.
(5) Verify that the measuring receiver total harmonic distortion indication is within
limits listed in table 9.
(6) Using standard Sub-harmonic measurement techniques on the spectrum
analyzer, verify that the measuring receiver indication is within limits listed in table 9.
(7) Using standard distortion techniques measure the non-harmonic distortion
using a 5 kHz offset from the center carrier frequency, verify that the measuring receiver
indication is within limits listed in table 9.
(8) Repeat techniques of (2)(c) and (3) through (7) above for remaining frequencies
listed in table 9.
Table 9. Spectral Purity.
Measuring Receiver
Test instrument
Harmonic related
THD
Sub-harmonic
Non-harmonic
frequency
Max ≤ (dBc)
Max ≤ (dBc)
Max ≤ (dBc)
(dBc)
10.0
MHz
-40
-28
-80
-50
500.0
MHz
-40
-28
-80
-50
2.0
GHz
-40
-28
-40
-50
1,2
10.0
GHz
-40
-30
-40
-50
20.02
GHz
-40
-40
-30
-50
2
25.0
GHz
-40
-40
-30
-50
1 Upper limit if using an E4440A as the measuring receiver system.
Measure 2nd harmonic.
2
(9) Set TI outputs to minimum.
b. Adjustments. Refer to paragraph 6 c.
12. Sideband Phase Noise
a. Performance Check
(1) Press TI keys as listed in (a) through (e) below.
(a)
Preset.
(b)
RF On/Off to Off.
(c)
AMPD, 0 and dBm.
(d)
FREQ, 1, 0, and MHz.
(e)
RF On/Off to On.
(2) Set measuring receiver as listed in (a) through (f) below.
(a)
Mode to Phase Noise.
(b)
Measure to Spot Frequency.
(c)
Measurement Setup Spot Offset to 20 kHz.
(d)
Avg Number to 10 and on.
(e)
Frequency Channel to 10 MHz.
(f)
Press Restart.
(3) Verify that the measuring receiver SSB avg display is within limit listed in
(4) Repeat technique of (1)(d), 2(e) and 2(f) above for remaining rows in table 10.
