TB 9-6625-2185-35
Function
generator
Record display
Reading
Downscale
Range
(dBm)
readings
should be:
correction
10.00 w
2
-20
---
---
100.00 w
3
-10
---
---
4
-0
---
1.00 mw
---
(21) Set 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.
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.
2See 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 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 level generator output and display
indications listed in table 7. If all ranges are in tolerance, repeat paragraph 9a above.
