TB 9-6625-2043-35
Table 3. Meter Sensitivity - Continued
True rms
True rms
Adjustments
Test instrument
Adjustments
Test
(R)
indications (dBm)
(R)
instrument
indications
(dBm)
-10
-10 dBm
-9.75
-10.25
R521
-10
(100.0 W)
-10
-20 dBm
-19.75
-20.25
R543
-20
(10.0 W)
0
0 dBm
-.2
+.2
R520
0
(1.000 mW)
0
-10 dBm
-9.8
-10.2
R548
-10
(.100 mW)
+10
+10 dBm
+9.75
+10.25
R519
+10
(10.00 mW)
+10
0 dBm
-.25
+.25
R562
0
(1.00 mW)
b. Adjustments
(1) Adjust function/arbitrary generator output for an indication of -30.00 dBm on
true rms voltmeter.
meter (R).
13. dBm Ranging (Model 42BD Only)
a. Performance Check
(1) Connect TI power detector to function/arbitrary generator Output.
(2) Set FULL SCALE range selector switch to 10 mW.
output for TI indication of 10 mW.
(4) Set OFF-PWR-dBm switch to dBm. If TI does not indicate between +9.8 and
+10.2 dBm, perform b (1) below.
(5) Reduce function/arbitrary generator output to minimum.
(6) Set FULL SCALE range selector switch to 100 nW and OFF-PWR-dBm switch
to PWR.
(7) Adjust function/arbitrary generator output for TI indication of 100 nW.
(8) Set OFF-PWR-dBm switch to dBm. If TI does not indicate between -39.7 and
-40.3 dBm, perform b (2) below.
(9) Set FULL SCALE range selector switch to 1 mW and OFF-PWR-dBm switch
to PWR.
(10) Adjust function/arbitrary generator output for a TI indication of 1.0 mW.
(11) Set OFF-PWR-dBm switch to dBm. If TI does not indicate between -0.2 and
+0.2 dBm, perform b (3) below. Record TI indication.
