TTI TCB-550 - Receiver Section Alignment

Figure 2
Figure 3
Notch󰼿filter󰼿
30dB󰼿ATT󰼿
TCB550󰼿
󰼿
Power󰼿
Supply󰼿
Spectrum󰼿
Figure 4
5-3. Receiver Section Alignment
5-3-1. Required Test Equipment : If uses in HP8920, the 1)~4) equipment is not a necessity.
1) Standard Signal Generator (SSG)
2) SINAD Meter
3) AC Level Meter
4) Distortion Meter
5) Oscilloscope
6) DC power supply (13.2V/3A)
7) 8 ohm Dummy Load
5-3-2. Alignment procedure
Step Test Item UUT setting Equipment setting
Alignment
point
Spec.
1
AM
Audio output
Adjustment
Channel: CH19 Connect the equipment and
Function:
1) AM mode 2) CB
Unit: RX condition
Volume: Optional
Squelch: Minimum
Others: Don’t care
UUT as shown on Figure.5
SSG setting:
1) Freq.: 27.185MHz
2) AF: 1KHz
3) RF level: -47dBm
4) Modulation: 30%
LR1
L1
L2
L3
LR2
LR3
LR4
Audio Level:
>5V at maximum
unit’s volume.
Distortion:
<5% at 2V audio
level (need unit’s
volume adj. to get
2V audio level)