TB 9-6625-2134-24
Table 1. Calibration Description Continued.
Test instrument parameters
Performance specifications
IF gain
Range: 93 dB of gain increase, 10 dB of gain decrease (MIN NOISE
activated) in 10 dB and 1 dB steps
Accuracy:
Gain steps are monotonic (same direction) with the following limits:
Within 0.2 dB/dB to a maximum of 0.5 dB/9 dB except at the decade transitions of -19 to
-20 dBm, -29 to -30 dBm, -39 to -40 dBm, -49 to -50 dBm, -59 to -60 dBm, and -69 to -
70 dBm, where an additional 0.5 dB can occur for a total of 1.0 dB per decade.
Maximum deviation of the 90 dB range is within +2 dB.
Sensitivity (option 01)
The following tabulation shows the equivalent maximum input noise for
through 5 (100 kHz to18 GHz ), and Tektronix high performance
waveguide mixers for bands 6 through 10 (18 to 140 GHz). The NARROW
video filter is activated for narrow resolutions (1 kHz or less); WIDE filter
for wide resolution.
Frequency/band to include
Equivalent input noise for resolution bandwidths (dBm)
2 (GHz)
WM490-2 (option 21)
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
(dBm)
(dBm)
(dBm)
(dBm)
(dBm)
50 kHz to 7.1 (bands 1 to 3)
-118
-110
-100
-90
-80
5.4 to 12.0 (band 4)
-103
-95
-85
-75
-65
12.0 to 18.0 (band 4)
-98
-90
-80
-70
-60
15.0 to 21.0 (band 5)
-93
-85
-75
-65
-55
1
18.0 to 26.5 (band 6)
-108
-100
-90
-80
-70
1
26.5 to 40.0 (band 7)
-103
-95
-85
-75
-65
1
40.0 to 60.0 (band 8)
-103
-95
-85
-75
-65
60.0 to 90.0 (band 9) 1
Typically -95 dBm (-103 dBm w/opt 03) at 60 GHz degrading to -85 dBm
(-93 dBm w/opt 03) at 90 GHz
1
90.0 to 140 (band 10)
Typically -85 dBm (-93 dBm w/opt 03) at 90 GHz degrading to -75 dBm at
140 GHz (-83 dBm w/opt 03)
1
140 to 220 (band 11)
External mixer dependent
1
Spurious responses
Range: Intermodulation products
(option 01)
1.8 to 18 GHz: At least -70 dBc from any two on-screen signals
within any frequency span.
1.7 to 1.8 GHz : At least -70 dBc from any two -40 dBm signals
within any frequency span.
Calibrator (CAL OUT)
Level: -20 dBm, 0.3 dB
EXT in HORIZ/TRIG
Input voltage range: 0 to 10 V (dc + peak ac) for full screen deflection
Trigger: 1.0 V peak (minimum) Frequency 15 Hz to 1 MHz
Maximum input: 50 V (dc + peak ac)
Maximum ac input: 30 V rms to 10 kHz then derate linearly to 3.5 V rms
at 100 kHz and above.
Pulse width: 0.1 s minimum
1
1st LO and 2d LO output
Provides access to the output of the respective local oscillators (1st LO +7.5
dBm minimum to a maximum of +15 dBm. 2d LO -22 dBm minimum to a
maximum of +15 dBm). These ports must be terminated in 50Ω at all
times.
1
Vertical output
0.5 V, 5% of signal per division of ac video above and below the centerline
1
Horiz out
0.5 V/div either side of center full range -2.5 V to +2.5 V, 10%
Sweep time
Range: 20 s/div to 5 s/div in a 1, 2, 5 sequence (10 s/div in auto)
Accuracy: 5%
2.0 divisions of signal for internal, and 1.0 V peak minimum for external
Triggering
1 This
calibration description is for information only and not verified in this procedure.
Tektronix Type high performance waveguide mixers.
2
5