TB 9-6625-2127-35
(5) Repeat technique of (3) and (4) above
limits specified, perform b(5) and (6) below.
at TI switch positions and for meter indications listed in
table 4. If
true rms voltmeter does not indicate within
Table 4. Carrier Level (75 ohms)
Test instrument
Range switch
Meter
Adjustments 1
positions
indications
30 to 100 Hz
(dBm)
(dBm)
600 kHz to 1 MHz
10 Hz to 600 kHz
1 MHz to 3 MHz
Min
Max
Min
Max
Min
Max
-40
0
-40.5
-39.5
-40.2
-39.8
-41.5
-38.5
A2C12 (-40 dBm)
-30
0
-30.5
-29.5
-30.2
-29.8
-31.5
-28.5
A2C7 (-30 dBm)
-20
0
-20.5
-19.5
-20.2
-19.8
-21.5
-18.5
A2C4 (-20 dBm)
-10
0
-10.5
-9.5
-10.2
-9.8
-11.5
-8.5
---
0
0
-0.5
+0.5
-0.2
+0.2
-1.5
+1.5
---
+10
0
+9.5
+10.5
+9.8
+10.2
+8.5
+11.5
A2C1 (+10 dBm)
1Set test oscillator to 100 kHz for adjustments.
(6) Set RANGE switch to +10 dBm.
b.
Adjustments
kHz and output for a -50-dBm indication on true rms
kHz and output for TI meter indications listed in table 5.
voltmeters.
True rms voltmeter will indicate within limits specified.
NOTE
Table 5. Meter Tracking
A3R43 (1 kHz) (Fig. 2) is accessible through
Test instrument
True rms
battery compartment. Removal of chassis
meter
from case is not required.
indications
indications
(dBm)
(dBm)
(2) Adjust A3R43 (1 kHz) until TI meter
indicates 0 dBm (R).
Min
Max
-2
7.8
8.2
(3) Adjust test oscillator frequency for 3
-4
5.8
6.2
MHz, keeping true rms voltmeter indication constant.
-6
3.8
4.2
-8
1.8
2.2
-10
-0.2
+0.2
indication 0 dBm (R).
(5) Perform (a) through (e) below prior to
Change 1 6