Table of Contents
Advertisement
5. Log Amplifier Adjustments
Note
4. Connect DVM to A4AlTPl and DVM ground to the IF casting.
Connect the frequency synthesizer to the RF INPUT. Key in
80 MHz and
synthesizer will now provide a 5OfI load.
Offset Adjustment Check
5. Adjust A4A2R79 ZERO for 0.0000 f0.0005 V dc. See Figure 3-34
for location of adjustment.
L O G AMPLIFIER-
L O G A M P L I F I E R -
F I L T E R
D E T E C T O R
Figure 3-34. Location of Log Amplifier Adjustments
6. Press LOG
(
ENTER
7. Set the frequency synthesizer for 7.6000 MHz at +5.0 dBm output
level.
8. Adjust A4A3C55 CTR for maximum DVM indication. See
Figure 3-34 for location of adjustment. If A4A3C55 is at an
extreme of its adjustment range (fully meshed, maximum
capacitance, or unmeshed, minimum capacitance), increase or
decrease value of A4A3C52 and A4A3C53. Refer to 'able 3-3 for
range of values.
If A4A3C55 is fully meshed, increase the value of A4A3C52 or
-86.98 dBm. The frequency
[
)
AMPLITUDE
Z E R O
LG
10
LG
20
CTR
AMPTD
Advertisement
Table of Contents
