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5. Ensure that is is possible to tune another frequency in the same frequency band.
6.
Select tuning LOCK and ensure that frequency is not changed by further rotation
of tuning knob.
5.5.3
Frequency Stability
1.
Connect the frequency counter to the output of REF
IN/OUT
12.
2; Ensure
th~t
the output frequency is 1 MHz
±
1 Hz.
5.5.4
Frequency Calibration Resolution
Connect the frequency counter to internal standard (A8TPIO).
Ensure that the internal standard is
5
MHz
±
1
Hz.
5.5.5
RF
Gain Control
1. Set up the equipment as in Figure 5-1.
2. Set the Receiver controls as follows:
a. Power
ON
b.
Gain
Mode
Manual
c. Detection Mode
CW
d. BW
3.24 kHz
3. Set the signal generator for an output of 1.5 MHz at -100 dBm, CW.· Connect the
signal generator to RF
IN
connector 11 on rear panel.
4. Using the remote controller, adjust the manual gain control on the Receiver fully
clockwise and adjust the line level control for 1 m W output on distortion analyzer.
5. Adjust the manual gain control on the remote control device one step down and
check whether or not the AF output falls by 3
±
1.5 dB.
6. Increase signal generator level to 1 m W and repeat step 5 until manual gain is at
minimum.
7. Restore the 1 m W reference at the minimum manual gain and note the signal
generator level. This should be greater than -10 dBm.
5.5.6
Final IF Frequency
1. Set up the equipment as shown in Figure 5-1.
2.
Set the Receiver controls as follows:
a. Power
ON
b. Gain Mode
AGC-SHORT
c.
BW
3.2 kHz
d. Receiver Tuned
1.5 MHz
Frequency
e.
Detection Mode
CW
5-13
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