TB 9-6625-2185-24
Table 5. Downscale Sensor Correction Levels
Function
generator
Record display
Reading
Downscale
Range
(dBm)
readings
should be:
correction
2
-20
---
---
10.00 Pw
3
-10
---
---
100.00 Pw
4
-0
---
1.00 mw
---
(21) Set synthesizer/level generator to STANDBY.
(22) Set control bit switch to CALIBRATE MODE 2 (AC CAL) (fig. 3).
(23) Using downscale corrections recorded in (19) and table 5 above, press
pushbuttons from left to right as listed in table 6.
Table 6. Downscale Correction Data Entry
Press Pushbuttons 1 2
0, RANGE HOLD, 0, dB LIMITS HI
1, RANGE HOLD, X, dB LIMITS HI
2, RANGE HOLD, X, dB LIMITS HI
3, RANGE HOLD, X, dB LIMITS HI
4, RANGE HOLD, X, dB LIMITS HI
1
X Denotes downscale correction.
2
See note and example on page 16
NOTE
To enter negative corrections, press CHS pushbutton after
downscale number.
Example: To enter -8 on range 1, press 1, RANGE HOLD, 8,
CHS, and dB LIMITS HI pushbuttons.
(24) Set control board bit switch to OPERATE MODE (fig. 3).
(25) Press RANGE AUTO, MODE dB, and ZERO pushbuttons, wait for zeroing
to complete.
(26) Turn synthesizer/level generator to ON and position controls for a 50 MHz, -34
dBm output. If display does not indicate between -34.12 and -33.88, record as out-of-
tolerance display indication for range 0.
(27) Repeat technique of (26) above for synthesizer/level generator output and
display indications listed in table 7.
If all ranges are in tolerance, repeat
paragraph 9 a above.
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